GoldenMotor.com Forum

General Category => General Discussions => Topic started by: GM Canada on October 08, 2010, 01:05:57 PM

Title: TIRES TIRES TIRES!
Post by: GM Canada on October 08, 2010, 01:05:57 PM
I see posts about tires in different threads all over the forum. Maybe it would be more helpfull if dedicate a thread to this topic.

So what tires do you use on what rim?

What pressure do you run it at?

Where did you find it?

Is there a link you can provide to us?

Ill start with mine. I needed tires for 26 inch rims, I needed them for a heavy rider with trailor and gear so I went for something thicker then most

My tires are 26 x 2.125. That seems about as thick as I can go and still use my fenders.

I keep the front tire at about 25 pounds and the rear at 35. Gives a soft smooth ride.

I buy most of my tires at Canadain Tire

http://www.canadiantire.ca/AST/browse/5/SportsRec/BikesAccessories/BicycleAccessories.jsp?locale=en

unfortunatly the website does not list all the tires available in the store.

Gary
Title: Re: TIRES TIRES TIRES!
Post by: MonkeyMagic on October 08, 2010, 07:07:26 PM
Yes true but I think I'm possible in a different category?

I can find few metric tires but none that are the width I want (3"+)

Gary, do you stock any of the cast wheels or the 'Cleaver' bike - could you possibly tell me the tires on that?

yay
Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on October 08, 2010, 07:26:24 PM
Please let's not make different catagories. The common sizes like mine are easy to find. This thread really is for people with uncommon sizes like yourself. Hopefully people that do find tires will post where they found them here. Sorry I have every size rim in stock but nothing comes with a tire on it.

Gary
Title: Re: Wide Tires!
Post by: Bikemad on October 09, 2010, 12:06:05 AM
I can find few metric tires but none that are the width I want (3"+)

3"+ is very wide!

Take a close look at these 20 x 4.25" tires:
(http://images.nitrosell.com/product_images/1/94/VTread.JPG) (http://www.choppersus.com/store/product/772/Tire-20-x-4.25-Big-Boa/)(http://images.nitrosell.com/product_images/1/94/02601.JPG) (http://www.choppersus.com/store/product/121/Tire-20-x-4.25-Fat-Cat-/)
Click the above images for more info.

Monkey, a 4.25" wide tire is really much too wide for your wheel:
(http://images.americanlisted.com/nlarge/schwinn_stingray_orange_county_chopper_bike_125_south_st_louis_10448443.jpg)

I reckon those 20 x 2.3" Curb Monkeys would be ideal:
(http://www.chainreactioncycles.com/Images/Models/Full/42324.jpg)(http://i217.photobucket.com/albums/cc153/belair9514/2887886735_1863020387.jpg)

What size are you using at the moment?

Alan
 
Title: Re: TIRES TIRES TIRES!
Post by: Leslie on October 09, 2010, 12:29:46 AM
Please let's not make different catagories. The common sizes like mine are easy to find. This thread really is for people with uncommon sizes like yourself. Hopefully people that do find tires will post where they found them here. Sorry I have every size rim in stock but nothing comes with a tire on it.

Gary

Gary collect the links to the sizes that matter and update the first post, I would do it but it not my op. So too this information doesn't get lost in the middle of 20 pages.  This way you can have the common sizes herein too in one post.


Whoooah those 20 x 4.25" tires are like, hmm.

Awesome.
Title: Re: TIRES TIRES TIRES!
Post by: Andrew on October 09, 2010, 07:20:52 AM
i've just bought these... Schwalbe Big Apple KevlarGuard Tyre 26 x 2.35

from here http://www.cyclesportsuk.co.uk/product_info.php?products_id=4307&cPath=450

 I cannot give any impressions yet as only one is fitted and the other is awaiting the pie wheel.

i have it pumped to 40psi on front, I expect to have at least this psi in the rear.  it's a nice fat tyre 8)

i probably would have bought these if I had seen them first, I think Alan has them on his bike.....
...... http://cgi.ebay.co.uk/26-Schwalbe-Crazy-Bob-Slick-MTB-Bike-Dirt-Street-Tyres-/120608922001?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item1c14da1991   "wrap around tread" - nice! :)


Andrew
Title: Re: Wide Tires!
Post by: MonkeyMagic on October 09, 2010, 10:25:20 AM
What size are you using at the moment?

Alan
 

Hi Alan, yes the stingray tires are a bit out of the question (how do people pedal with those things!!) and I am running standard 20"x2.125 freestyles. When I turn a corner at speed I can feel the tire roll, and pumping it past ~35PSI the tire will egg and I end up having a fllintstones ride.... I get way too many flats with these tires too.

I really just want something around 3", but those curb monkeys are looking a treat, I think they will suit well. More and more I am finding that 2.5" will be the limit for the bead seat measurement in some metric tires I've found. Still really want some way of fitting them first.

Running a standard wheel on the back for the interim until I fix the rear pie, I am noticing the huge difference in ride quality as the back wheel (standard bmx rim) has a tire at ~50PSI and the front is ~30PSI

I couldn't really notice that with both wheels on a low pressure, I'm sure I could get upto 5km/h better top speed with better rolling resistance.

Curb Monkeys !!

Title: Re: TIRES TIRES TIRES!
Post by: Sundsvall on October 09, 2010, 05:23:13 PM
One thing to think about when it comes to wide tyres is a suitably rim. Even if the tyre probably will fit as long as the bead size diameter is correct, a too narrow rim will most certainly make the bike unstable. To avoid that, you have to inflate it too much and increase the risk for a flat.

I changed the rim to a 46 mm wide Sun Ringle Double Wide for my 24 x 3” tyre.

Peter
Title: Re: TIRES TIRES TIRES!
Post by: Leslie on October 10, 2010, 01:01:26 AM
too narrow rim will most certainly make the bike unstable. To avoid that, you have to inflate it too much and increase the risk for a flat.


Peter


Yes I used a 26X3 Holly Roller on a narrow rim and it was crappy, used to give out under the rim around corners.
Title: Re: TIRES TIRES TIRES!
Post by: MonkeyMagic on November 20, 2010, 09:25:19 PM
Hey chaps

This will apply to anyone with a cast, or smaller GM wheel. However, there are MANY options available for a heap of wheel options and different vehicle types.

I have continued my hunt.... And by word of mouth from a local supplier here - recommended contacting SAVA tires. He passed me a website and told me to write back to him with my size preference.

The local supplier told me to look for the INSIDE diameter, not the overall diameter - as I could find a much better fit.
GM 20" Casted wheel = 16" Inside diameter. Searching for this size has generated many more options.

So if you live in Europe, bonus!! And you are probably laughing at my post wondering why I had never heard of them before.

Anyway it is really difficult to find different tire options in Australia, so I assumed other people could have the same problem elsewhere.
Here's their site in Europe, and they have WW presence.

http://www.savatech.eu/tyres (http://www.savatech.eu/tyres)

I've been recommended these for my cast 20" wheels:
2 1/2 -16    42 J    TL/TT REINF.    
2 3/4 -16    46 J    TL/TT REINF.    

16" inside diamter, 2.5inch for front, 2.75inch for the rear. They look super sporty but not sure what they will be like in the wet. I take it easy anyway and prefer the 'slicker' look

http://www.savatech.eu/tyres/moped/sport.html (http://www.savatech.eu/tyres/moped/sport.html)

Cheers MM
Title: Re: TIRES TIRES TIRES!
Post by: Leslie on November 21, 2010, 01:55:59 AM
My bad that came out wrong.  Ooops!

What I am saying is Im glad you found your new shoes for your MP.

I'll take a look at that site myself and see if I can make any improvements on my stock Snake Pie tires,
Title: Re: TIRES TIRES TIRES!
Post by: MonkeyMagic on November 21, 2010, 04:40:50 AM
huh what came out wrong?

:D
Title: Re: TIRES TIRES TIRES!!!!!
Post by: MonkeyMagic on February 07, 2011, 03:29:53 PM
Okay so a day or 2 after posting my last post in this topic, I spoke with a Sava dealer here is Oz and he ordered a couple of tyres for me. That's back in November and he was just ordering a new shipment of tyres and got a hold of some for me. Not sure if you can get anything like this in Australia, but from all the tyre dealers I've spoken to, they all said to goto Sava for my wheel...

I notice today that's quite a long wait for tyres... But holey crap who cares!!!
(http://i1196.photobucket.com/albums/aa406/bytmeh/Tyres/P2070092_1024x768.jpg)

Check this out....
(http://i1196.photobucket.com/albums/aa406/bytmeh/Tyres/P2070097_1024x768.jpg)
Thats my original BMX tyre on the left, and 2 new tyres on the right.

Both tyres are 16" inside diameter tyres that fit the cast 20" wheels PERFECTLY. A normal BMX or bicycle tyre I find you can nearly hoola hoop over the cast wheel, when I trial fitted the big mother I nearly needed a tyre lever to get it on there.

I tried to show the difference here:
(http://i1196.photobucket.com/albums/aa406/bytmeh/Tyres/P2070094_1024x768.jpg)
(BMX tire on top, new Sava 'moped' tyres underneath)

You can tell a bit the inside diameter is larger on the bicycle tyre compared to what I have now. This meant I had to run low pressure in my wheels since I've had them - as fully inflated my standard BMX tyres would 'balloon' making me bounce up and down like a cowboy.. And I like tacos not sausages so that wasn't for me haha

I have 2.5" for front, 2.75" for rear just as I posted in November:
2 1/2 -16    42 J    TL/TT REINF.   
2 3/4 -16    46 J    TL/TT REINF.

These are some serious tyres and I just need to goto a tyre dealer tomorrow for some decent tubes. No idea if they will increase or decrease my speed. They are overall bigger (taller) but they are heaps heavier. They are however, speed rated at 150km/h so that's a good thing in case my bike gets struck by lightning one day, at least my tyres will be okay with the speed lol

Anyway YAY - it worked out. Personally I know the 16" and 18" cast wheels work fine with bicycle/other general tyres but these 20" wheels were a real head scratcher..

Haha look at the difference:
Before.... (inflated)
(http://i1196.photobucket.com/albums/aa406/bytmeh/Tyres/P2070101_1024x768.jpg)

After ;) (not inflated....)
(http://i1196.photobucket.com/albums/aa406/bytmeh/Tyres/P2070102_1024x768.jpg)

The wheel apparently can take upto a 3" version of these, but I was scared about chain room.. I'm still thinking I have to get a 5 speed rear freewheel and space it out from the hub with this chunka on there...

You can get different tread versions but I wanted this style, you will see once I finish re-building the bike :)

http://www.savatech.eu/tyres (http://www.savatech.eu/tyres)



Title: Re: TIRES TIRES TIRES!
Post by: Andrew on February 07, 2011, 05:20:11 PM
WTF! :o :o :o :o

they are the Mutz Nutz!

Those are what you call NAUGHTY!

Bloody Marvelous :D :D :D

PHWOAR!!

I love rubber ;)
Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on February 07, 2011, 10:03:46 PM
Wow! Nice tires. Can you get out a measuring tape? I am very curious as to what the height of the wheel is with that tire on. Once inflated can you measure from the ground up to the very top of the tire. I am wondering how close you are getting to the overall height of a regular 26 inch tire.

Gary
Title: Re: TIRES TIRES TIRES!
Post by: MonkeyMagic on February 08, 2011, 06:44:52 AM
Okay I got some tubes today, I took my wheel down and when I told the tyre dealer it was for my bicycle he nearly fell over laughing haha

Can't find my camera charger arghhhhhhhhh
Title: Re: TIRES TIRES TIRES!
Post by: MonkeyMagic on February 08, 2011, 06:54:16 AM
This will be next lolllllll

http://www.youtube.com/watch?v=aEpTwOHKjjw&feature=related (http://www.youtube.com/watch?v=aEpTwOHKjjw&feature=related)

yipes
Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on February 08, 2011, 08:57:04 PM
Okay I got some tubes today, I took my wheel down and when I told the tyre dealer it was for my bicycle he nearly fell over laughing haha

Can't find my camera charger arghhhhhhhhh

Look behind all those bottles piled up all over the table and counter tops. ;)

Gary
Title: Re: TIRES TIRES TIRES!
Post by: MonkeyMagic on February 09, 2011, 08:22:22 AM
Lol true, I need to put a key finder on that thing...

Anyway its still lost haha

I measured the wheel, I had to take it up in the car to the service station to fill the tyres, the tubes I got have metal threads with locking nuts that keep the tube in place.

Wheel measures 22" now from ground to top, so I have increased 2" in height. Cool.

When fitting the wheel, it has a message on the side saying to use a tube with rim that uses tubes.

Looking around for right angle valve attachments so I can fill the tyres at home, I noticed normal motorcycle rim valves.

Honestly, the way these tyres fitted - I had to press VERY firmly with my foot, and would have been better off with a tyre lever. They were that tight of a perfect fit, I put the rear one on checking the direction, but forgot with the front !!

So when I took the front off, it actually 'popped' off before I flipped it around to the correct direction (directional tyres)

I might even try getting some snap in valves and not run tubes altogether, Tom from GM came back to me when I first bought the wheel saying "it suits 2.5" / 20" bicycle tire" No it doesn't.... Lol its a 16" motorcycle size rim so I would be putting some cash down I could possibly run these tubeless.

I'll stick with the tubes anyway, they aren't too heavy and I'm sure it provides some added protection.

So 22" height it is. The 50mm increase is just about all rubber too haha




Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on February 09, 2011, 04:32:03 PM
22 inches, thats great, will you be able to use your pedals again?

Gary
Title: Re: TIRES TIRES TIRES!
Post by: MonkeyMagic on February 20, 2011, 05:15:14 AM
Hey I forgot to answer that one Gary sorry...
YES I can use pedals now :D Woohoo

Not just because of the tyres, but mainly due to changing the rear suspension spring from 150mm to 220mm, this gave me HUGE clearance for pedals, but changed my ride height so it won't corner as good but at least its safe.


Cheers


Title: Re: TIRES TIRES TIRES!
Post by: Electrobent on February 20, 2011, 05:55:20 PM
I needed tires for 26 inch rims, I needed them for a heavy rider with trailor and gear so I went for something thicker then most

My tires are 26 x 2.125. That seems about as thick as I can go and still use my fenders.

I keep the front tire at about 25 pounds and the rear at 35. Gives a soft smooth ride.




I know its counter-intuitive but for weight you want the skinny, high pressure tires.  I run Geax Street Racer 26 x 1.25 at 100 psi on the rear.  Not a smooth ride but the pot holes don't snake-bite the tubes either.

I am pleased that GM went with the narrower wheel when I bought my second wheel.



--Eric
Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on February 24, 2011, 01:42:02 AM
There are a few things I don't like about skinny tires. One is they always seem to leak air if the bike sits for any thime at all. Maybe its just bad luck or bad tires but I have gone though alot of them as they never seem to hold high pressure air for long. Also with the extreme wieght of my ride they do hit the rims even with max air pressure in them. Maybe it will be different with my dual mini motor ride as it has lighter motors. I am also thinking of placing the battery in the trailor to help as well. But truthfully the real issue is not the wieght of the bike, motors or batteries. It is the load in the seat! ::)

Gary
Title: Re: TIRES TIRES TIRES!
Post by: Electrobent on February 26, 2011, 05:19:16 AM
Yeah, my 100 lb rear tire is at 80 at the end of a ride, but it has hit some pretty bad pot hole edges with my 245 # ass on top of it.  I guess its just a lot harder to contain 100 psi of air than 25.
Title: Re: TIRES TIRES TIRES!
Post by: MonkeyMagic on February 26, 2011, 11:34:28 AM
I think my pizza cutter is 1.25" ;)
Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on March 06, 2012, 01:06:03 AM
Recently I was asked what fits on the 16 inch Magic Pie. I had a 16x1.75 tire on mine originally, now I have a 16 x .2.25.

Gary

(https://arhservices.co.uk/GoldenMotorCanada/027-1.jpg)
Title: Re: TIRES TIRES TIRES!
Post by: Henry Chang on March 06, 2012, 04:08:47 AM
Very big, very thick tire, a bit like motorcycle tyres, Loaded with the amount of good
Title: Re: TIRES TIRES TIRES!
Post by: Andrew on March 08, 2012, 08:20:51 PM
i've got 2.35 on my 26",  but am tempted to try 2.50 on one of my frames as there is room for this width.  One day when I have the funds I would like to try Maxxis Hookworm tyres.. http://www.chainreactioncycles.com/Models.aspx?ModelID=5847 (http://www.chainreactioncycles.com/Models.aspx?ModelID=5847)
Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on March 15, 2012, 04:54:32 PM

The local supplier told me to look for the INSIDE diameter, not the overall diameter - as I could find a much better fit.
GM 20" cast wheel = 16" Inside diameter. Searching for this size has generated many more options.


After just helping a person with finding a tire to fit his cast 20 inch wheel I read this post and went to google to search for tires. I found this link.

http://cyclocamping.com/blog/2015/08/01/what-do-size-markings-on-bicycle-tires-mean/

This is excelant in describing the issues people have with finding appropriate tires. The ETRTO standard of measuring tires by the inside diameter is far better then the Imperial standard of measuing tires by the outside diameter. If you look at this link you can see that tires are available in 7 different inner diameter measurments and they still are considered 20 inch tires.

Gary
Title: Re: TIRES TIRES TIRES!
Post by: SydneyCommuter on March 18, 2012, 12:27:09 PM
Gary good idea starting a thread on tyres, getting the right combo of roll,weight, comfort, puncture resist is making of a happy riding, when I started commuting on my one man power cycle some idiot at a bike shop flogged me some super slick 26 tyres that popped a flat every other trip, enough to have you throw in t towel pretti quick, if I new then what I know now!
 Guys my major requirement is puncture proof, priority 1 thru 5!
Traveling 28km ea way the last thing I need is to get a flat, I think of the effort to get my tires on in the comfort of my guarage, I'd hate to be fighting my pi off the back at the side of the road.
Since I went for schwalbe marathons no puncture yet and that's quite a few hard kms. As the dual pi has power to burn, roll resistance and weight are not in the equation , so i'm looking for something with more air. 
My dual mini lightweight build I've gone with the marathon 1.5's. As power is limited.
Anyone got a good suggestion for a bit more comfort on my dual pi, but max puncture resistance, short of monkeys motorcycle tyres?
Cheers
Title: Re: Solid Tyres
Post by: Bikemad on March 19, 2012, 01:54:25 PM
Anyone got a good suggestion for a bit more comfort on my dual pi, but max puncture resistance, short of Monkeys motorcycle tyres?

Have you considered using solid tyres (http://www.greentyre.co.uk/bicycle-tyres.php)?

Quote from: greentyre.co.uk
The Greentyre Company has its own in-house computerised design and testing facility.The Company offer a full design and testing facility to all their customers to ensure that Greentyres are right for the job they are required to do.

Combining the advances made in polyurethane technology over the past 60 years, together with computer controlled production and advanced design, Greentyre have made a comfortable puncture proof tyre a reality.

Greentyres do feel a little different. Riders using Greentyres for the first time will experience the difference.
On roads and tracks all pneumatics have a tendency to go "psssss" whereas Greentyres go on and on. You can say goodbye to puncture repair kits, inner tubes, pumps, levers and tools when you ride in confidence with a Greentyre

Greentyres are just as stable as traditional pneumatics with the added bonus that they will never go flat. Roll and Ride performance are achieved in the production process enabling us to control whatever particular characteristic the client requires. Soft, medium or hard compounds give Greentyres the ability to outperform pneumatics again and again.


Take a look at the fitting video (http://www.greentyre.co.uk/fitting.php) to see exactly how they're fitted.

They appear to be the ideal solution, but has anyone here actually tried them?

Alan
 
Title: Re: TIRES TIRES TIRES!
Post by: Leslie on March 20, 2012, 04:22:43 PM
I got a beauty ATM.  Its called Cheng Shin Tyres, FLATFIGHTER, EPS casing.

Tried google my particular tyre and came up with blank.  But these are lined, puncture proof and have stiff rubber with a higher bag, and avoids bending in the corners. 

I was going through cheepies too fast. 

Spend $60 instead of $25 and the story changes dramtically.  This one has done hard time, maybe 8mths old now. 

Its been a long leason via my GF's proxy.  :-X 

You know, when you pick one thing and say we need this type, and we gotta buy the cheaper one because it looks the same quality, fools me too. 

Im allowed to say now, the better quality will save us much money in the long run and know it's true.   And we are feeling love in our lives again. 

A bad ebike tyre can make life just horrible. ::)

Life is so good when your Ebike has be performing smooth for so long.  Sighs.  8)
Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on March 21, 2012, 01:00:08 PM
On my Townie I have the "stock" tires that came with the bike. They are "Fat Frank" 26x2.35 ballon tires with Kevlar. Love the colour too! Sort of an off white. I think I'll look into a match for the Bob trailor. I wonder if the Fat franks come in 16 inch. That would really look good :)

Gary

(https://arhservices.co.uk/GoldenMotorCanada/053-1.jpg)
Title: Re: TIRES TIRES TIRES!
Post by: Leslie on March 21, 2012, 01:50:52 PM

Hi Gary.  Wow she looks great riding on fat franks  8)

How do the bags fair on those skinny rims? 

I Got a Maxis Holly Rollers and it seemed to roll almost as much side ways on corners as they did forward.  The tyres were hard to get onto the rims. 

The holly rollers were all tread with a crappy wall though.
Title: Re: TIRES TIRES TIRES!
Post by: Leslie on March 21, 2012, 02:08:26 PM
Last time I looked this shocked >  :o   was when someone threw a basket ball in my face. The Emoti sort of doesnt match the emotion. LOL
Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on March 21, 2012, 02:10:54 PM
Hi Les, Nice talking with you again :)

The original rims were a half inch wider then the pie rims. The max PSI for the tires is 60 and I was running 30 in the front and 40 in the rear. I did notice a bit of tire roll but nothing drastic. when I put on the trailor I pumped the rear up to 50 PSI. Everything seems fine now, but I do not push it to the limits when cornering. The only real issue I had was since the rims are thinner the brake shoes had to travel farther causing the arms of the brakes to rub on the tire when applied. I since added a few washers behind the shoes and everything is fine now. I have full regen on both wheels so I don't need the brakes much anyway. One thing I did notice with the MP3 is regen works right down to a dead stop. With the MP2 regen only worked down to about 10kph, then nothing.
 
Gary
Title: Re: TIRES TIRES TIRES!
Post by: Leslie on March 21, 2012, 02:14:05 PM
Gary.  Yer I noticed a lot of issues whn I had a lot of weight on the bilke with them SLAs.  Have you seen my off road vid I posted.  I tend to ride a bit crazy at times.
Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on March 21, 2012, 06:34:49 PM
No I have not seen it. Did you post the link some where?

Gary
Title: Re: TIRES TIRES TIRES!
Post by: OzGeeksGarage on March 17, 2013, 07:43:46 AM
Cool stuff, luckily I got the spoked aluminium rim 20" SmartPie and the factory cheeze cutters fit my trike fine, though I'm thinking of uprading to some wider BMX tyres soon as it lacks traction uphill at times :)
Title: Re: TIRES TIRES TIRES!
Post by: sixty_cycle_hum on May 09, 2013, 07:28:21 PM
I am running 26 x 2.5 Maxxis Hookworms at about 50psi for low rolling resistance. They're huge, and hard to fit through linear pull brakes unless deflated some, but they seem to fit just right in both of my frames.  Tons of volume, so pressure is really stable, and will take a big hit of a curb.  Have not had a "snake bite" flat with these ever.

They are sticky enough on anything dry.  Wet wooden bridges have not been attempted, but I suspect disaster if they are.  Too big for a front fender on this fork.  Need to figure something out.

http://www.amazon.com/Maxxis-Hookworm-Urban-Beaded-26x2-5/dp/B000A8NQQC

(https://dl.dropboxusercontent.com/u/249084/Forum%20Pics/Photo%20May%2008%2C%2010%2059%2009%20PM.jpg)

Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on July 19, 2013, 03:14:01 PM
It seems the most common rim size that people have trouble finding tires for are the 20 Inch rims. I have never used a 20 inch rim so I have no experience at what actually fits. It seems about 1 person in 20 can't find the right size tire so there must be a lot of people that are finding them. If anyone out there is using a 20 inch GM rim it would be great if you could post what tire size you are using. It would be help full to many people.

Thanks in advance!

Gary
Title: Re: TIRES TIRES TIRES!
Post by: MAGICPIE3FOCUSPOWER on August 11, 2013, 10:25:43 AM
I am using only Schwalbe high performance tires, no problem at all.
Only the price is......:-(
Title: Re: TIRES TIRES TIRES!
Post by: GM Canada on May 17, 2014, 10:57:07 PM
I know this is an old thread but I thought I would throw this in as tire size issues seem to still arise from time to time.

The following is taken from a recent conversation where the customer has a 26x 1 3/8 tire that does not fit a 26 inch rim. He was also getting the kit before the bike. Unusual but is does happen.

"I have more clarity on the sizing issue. If the tire has 26 inch printed on it and the second measurement is in decimal form it will fit any 26 inch rim. If it is in fraction form it is an outdated French standard and will most likely be impossible to find a rim that will fit it.

So for example

26 x 1.75 will fit any standard North American 26 inch rim
26 x 1 3/4 is and outdated French standard really only Common in Japan now.

To test this theory I stopped at Canadian tire. All ninety one bikes on display with 26 inch tires had the second measurement in decimal form. Which means all rims would be the North American standard for 26 inch rim. In ISO the rim would measure 559.

I looked on Sheldon brown and he calls the 559 standard a mountain bike rim size. But every different style of bike at Canadian tire had that size rim. I then called my local bike shop and asked them. They also told me all there bikes on display (over 400) all have the tire sizes in digital format except for some odd ball European bikes. Replacement rims for those bike are special order and very expensive.

Since most people are buying bikes with common North American standard bike rims I guess that's why I have never heard of a 26 inch tire not fitting. It is very uncommon to have a non standard size.

So in conclusion if you keep that 26 x 1 3/8 tire you are going to have a very hard time getting a rim to fit it. I would return that tire and get a tire in 26 inch in digital format like 26 x 2.215 to 26 x 2.55. Anything less then 26 x 2.215 will be a very rough ride at 32kph or higher.

Or a tire that has 700c or 29 x digital format number (no fraction).

I would still recommend 26 inch as it's such a common standard with tons of options in tire width and tread."

Gary