GoldenMotor.com Forum
General Category => eBike Mods/Legalization => Topic started by: Andrew on December 31, 2010, 09:07:47 PM
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most people probably run a Shimano 6 speed freewheel on their PIE. If like me you want to pedal at top speed then you may be wishing you had that extra small 11 tooth cog on the freewheel.
I've successfully done it and this is with my Hydraulic disc brake set-up too and my 26" X 2.35 fat road tyres. All this on a standard 135mm rear mountain bike axle ;D
Remember, that once done you will need to adjust your rear derailer and probably have to change to a 7 speed gear shifter.
(http://www.arhservices.co.uk/apaclark/1-2.jpg)
(http://www.arhservices.co.uk/apaclark/2-3.jpg)
(http://www.arhservices.co.uk/apaclark/3.jpg)
(http://www.arhservices.co.uk/apaclark/4-1.jpg)
(http://www.arhservices.co.uk/apaclark/5.jpg)
(http://www.arhservices.co.uk/apaclark/6.jpg)
(http://www.arhservices.co.uk/apaclark/7.jpg)
(http://www.arhservices.co.uk/apaclark/8.jpg)
(http://www.arhservices.co.uk/apaclark/9.jpg)
I hope this helps if you decide that you need that extra gear for pedalling when at full speed.
Andrew :)
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isn't there an cog with 11 tooth that is 6 speed?
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isn't there an cog with 11 tooth that is 6 speed?
Not that I've seen, I think even 12t is rare on a 6spd.
Hey Awesome work Andrew!! Great stuff you took some pics and posted it up, I was thinking with the washers - was cool but have you got some holding your axle in the dropouts now? I'm sure it's tight, but you don't want all that hard work you've done to 'spin' on you!
The guy at my local bicycle store is possibly the most unhelpful person alive lol, I'm sure there are many others that may have a suitable axle spacer. I had a quick squiz at this page: http://www.bicyclepartswholesale.com.au/contents/en-us/d65.html (http://www.bicyclepartswholesale.com.au/contents/en-us/d65.html) and there may be something there for a quick solution.
Good stuff, I'll pick up one of those now I'm sure it will fit :) I just received my linear stepper motor I'm building into the rear frame for an electronic gear change should be fun to see if I can get working
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isn't there an cog with 11 tooth that is 6 speed?
Due to the way the freewheel mechanism works, getting one with a smaller cog than 14 or 13 is rare. the 11 cog freewheel as far as I know only exists with the DNP Epoch as pictured above. I got it fron a US company and they inject it with grease using a special tool so it is silent and does not click loudly like the shimano freewheel.
and of course, please do not confuse a threaded freewheel with the modern splined cassettes which you usually find on modern bikes
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Monkey, Yes don't worry, I have torque washers in place , infact I have custom made ones which have blocks on them which wedge into the dropout space and are jammed in
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The biggest pain in the Ar$e has been the disc brake set. They have crap quality allen/hex bolts and after just a couple of adjustments the bolt heads have rounded. The brake calipers have caused me more headache than anything else
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Also, I have found it impossible to find 14mm ID washers with a less than 25mm OD. Trying to find a washer the same diameter and shape as the PIE axle is non existant as far as I know in the UK
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Also, I have found it impossible to find 14mm ID washers with a less than 25mm OD. Trying to find a washer the same diameter and shape as the PIE axle is non existant as far as I know in the UK
I've just discoveed that many car 'oil sump washers' have a 14mm inner diameter and less than 25mm outer. :)
So if you can spare one torque washer to go inside the DNP freewheel and line up with the axle shape, then a few sump plug washers could be used to fill out the rest of the internal space
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lol andrew you will never look at a washer the same again will you ;)
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lol andrew you will never look at a washer the same again will you ;)
Now when I look at clouds all I see are different size n shape of washers and spacers :D
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Also, I have found it impossible to find 14mm ID washers with a less than 25mm OD. Trying to find a washer the same diameter and shape as the PIE axle is non existant as far as I know in the UK
I've just discoveed that many car 'oil sump washers' have a 14mm inner diameter and less than 25mm outer. :)
So if you can spare one torque washer to go inside the DNP freewheel and line up with the axle shape, then a few sump plug washers could be used to fill out the rest of the internal space
Thank You for that! I have looked around and the best thing I found were lock washers. These are surprizingly stong. But a true washer would certainly be stronger.
Gary
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Nice post Andrew!
Instructions and good pictures, good stuff!
Gary
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Nice post Andrew!
Instructions and good pictures, good stuff!
Gary
No worries, it's something to do during these dark nights. The best washers i've found are aluminium sump plug washers that are 14mm ID and 20mm OD........ http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270661455664&ssPageName=STRK:MEWNX:IT (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270661455664&ssPageName=STRK:MEWNX:IT)
Probably best to avoid copper sump plug washers as they are more crushable and will oxidize
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You might consider lubricating freewheels with oil rather than grease. Grease can cause pawls to stick resulting in poor operation. Nice job on the installation work-around!
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nice tyres, are those schwalbe big apples ? and if they are, thoughts
ive been using schwalbe marathon kevlars. great but could use a little more test$%cle insulation if you know what I mean ;)
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Yes, they are the 'big apple tyres', or ballon tyres as they are also called. it's funny that you mention them as i've just changed them.
No. 1 , the suspension balloon affect of the tyre is redundant as they are pumped up to beyond 40psi.
No.2 , feel good in the dry but do not instill much confidence taking fast corners in the wet. i.e going straight through fast roundabouts.
No.3 , I had a nightmare taking one off a wheel and the rubber edge split and exposed the metal wire edge (probably my heavy handedness) but now it is unuseable.
I'm now about to try these - http://www.chainreactioncycles.com/Models.aspx?ModelID=24632 (http://www.chainreactioncycles.com/Models.aspx?ModelID=24632)
'Wrap around tread' 8) 8) if they are good on a smooth half pipe ramp, they should be good on the road. ;)
i believe 'Bike Mad' aka Alan, has them on his mountain e-bike. the price above on chainreaction cycles is by far the cheapest you'll find them for and it includes very quick free delivery
Andrew :)
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also, these could be really cool. wrap 'round tread with little rolling resistance http://www.chainreactioncycles.com/Models.aspx?ModelID=5847 (http://www.chainreactioncycles.com/Models.aspx?ModelID=5847)
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Thanks andrew...please let me know how you get on
p.s. dual pies installed now....OMG...you are in for a treat there my friend, just one caution, hold on to the handlebars tight when you first full accelerate, I kid you not, you will fly off !!!! after first ride, check the spokes, I had a couple work loose :)
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isn't there an cog with 11 tooth that is 6 speed?
Not that I've seen, I think even 12t is rare on a 6spd.
Hey Awesome work Andrew!! Great stuff you took some pics and posted it up, I was thinking with the washers - was cool but have you got some holding your axle in the dropouts now? I'm sure it's tight, but you don't want all that hard work you've done to 'spin' on you!
The guy at my local bicycle store is possibly the most unhelpful person alive lol, I'm sure there are many others that may have a suitable axle spacer. I had a quick squiz at this page: http://www.bicyclepartswholesale.com.au/contents/en-us/d65.html (http://www.bicyclepartswholesale.com.au/contents/en-us/d65.html) and there may be something there for a quick solution.
Good stuff, I'll pick up one of those now I'm sure it will fit :) I just received my linear stepper motor I'm building into the rear frame for an electronic gear change should be fun to see if I can get working
I had a look at doing a stepper motor gear change. I made up a test circuit with a 16 bit counter so you press one button to change up an another to change down. using 5 gears on the large chain wheel 6gears on the middle chain gear and then 5 on the smallest chain gear. Had to buy a sun tours free wheel 13t to 18t so the gear ratios wouldn't over lap.
However I enjoyed getting It to work on a bread board but when I found I only used top gear I abandoned the project.
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isn't there an cog with 11 tooth that is 6 speed?
Not that I've seen, I think even 12t is rare on a 6spd.
Hey Awesome work Andrew!! Great stuff you took some pics and posted it up, I was thinking with the washers - was cool but have you got some holding your axle in the dropouts now? I'm sure it's tight, but you don't want all that hard work you've done to 'spin' on you!
The guy at my local bicycle store is possibly the most unhelpful person alive lol, I'm sure there are many others that may have a suitable axle spacer. I had a quick squiz at this page: http://www.bicyclepartswholesale.com.au/contents/en-us/d65.html (http://www.bicyclepartswholesale.com.au/contents/en-us/d65.html) and there may be something there for a quick solution.
Good stuff, I'll pick up one of those now I'm sure it will fit :) I just received my linear stepper motor I'm building into the rear frame for an electronic gear change should be fun to see if I can get working
I had a look at doing a stepper motor gear change. I made up a test circuit with a 16 bit counter so you press one button to change up an another to change down. using 5 gears on the large chain wheel 6gears on the middle chain gear and then 5 on the smallest chain gear. Had to buy a sun tours free wheel 13t to 18t so the gear ratios wouldn't over lap.
However I enjoyed getting It to work on a bread board but when I found I only used top gear I abandoned the project.
I'm using a servo, and have build a working example. Just need to expoxy it all together and write a small code for a PIC and I'm good to go !!
I removed the big spring in the derailluer and used a metal gear servo. I was going to use a linear actuator, I have a small one but the servo seems to work better.
I'd love to have a chain drive motor and auto gear change based on speed, it would sound awesome lol
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andrew
how are your crazy bobs ?
Ive gone for the big apples...and you know, I didnt get many looks for the dual pies, but many many looks at the big apples
Everyone just keeps saying ( ive never seen anything so big, ( including the wife hehe, but thats another story !!)))
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the crazy bobs don't as yet show any significant wear though I do think they are a much softer compound compared to the apples. I bet the apples last a long time. I had as nightmare removing one of my apple tyres when swaping for the crazies. I used(never again) metal tyre levers instead of plastic ones and they completely destroyed the rubber edge of the apple tyre and now it has the inner wire exposed in several places. I'm not sure if the tyre is still safe to use as the wire could end up pinching the inner tube. I've wondered whether there is a cheap way of getting the tyre edge remolded but it's probably cheaper to buy a new one >:(. Shame as I was hoping to put both the apples I have on the new bike.
One thing I would say, if these kind of fat tyres aren't pumped up well I would not trust, them around fast bends, for instance, going straight through a round about at full throttle.
Are you using the 'balloon affect' or are they pumped to 40psi?
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isn't there an cog with 11 tooth that is 6 speed?
Not that I've seen, I think even 12t is rare on a 6spd.
Hey Awesome work Andrew!! Great stuff you took some pics and posted it up, I was thinking with the washers - was cool but have you got some holding your axle in the dropouts now? I'm sure it's tight, but you don't want all that hard work you've done to 'spin' on you!
The guy at my local bicycle store is possibly the most unhelpful person alive lol, I'm sure there are many others that may have a suitable axle spacer. I had a quick squiz at this page: http://www.bicyclepartswholesale.com.au/contents/en-us/d65.html (http://www.bicyclepartswholesale.com.au/contents/en-us/d65.html) and there may be something there for a quick solution.
Good stuff, I'll pick up one of those now I'm sure it will fit :) I just received my linear stepper motor I'm building into the rear frame for an electronic gear change should be fun to see if I can get working
I had a look at doing a stepper motor gear change. I made up a test circuit with a 16 bit counter so you press one button to change up an another to change down. using 5 gears on the large chain wheel 6gears on the middle chain gear and then 5 on the smallest chain gear. Had to buy a sun tours free wheel 13t to 18t so the gear ratios wouldn't over lap.
However I enjoyed getting It to work on a bread board but when I found I only used top gear I abandoned the project.
I'm using a servo, and have build a working example. Just need to expoxy it all together and write a small code for a PIC and I'm good to go !!
I removed the big spring in the derailluer and used a metal gear servo. I was going to use a linear actuator, I have a small one but the servo seems to work better.
I'd love to have a chain drive motor and auto gear change based on speed, it would sound awesome lol
You are a head of me there I've never worked with pic chips, and I should have said a 4 bit counter not 16 bit one that counts from 0 to 15. I fed the output into an eprom that I had manually programmed 16 lines of code.
the first 6 bit were for the 6 back cogs and the last 2 bits for the front three with a nor gate to get the third cog. It's funny how when you get all the little leds lighting up as you press the buttons how rewarding it is.
I also enjoyed using the sound card of my computer as an oscilloscope and finely getting the servos to work with a 556 timer.
but I gave up trying to solder it all together.