5 speeds 11T shortened freewheel

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Doctorbass   100 GW

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5 speeds 11T shortened freewheel

Post by Doctorbass » Apr 18 2011 10:23pm

I think that thing doesn't really exist
But for us that use hub motor at high speed and nearly never use the large gear of the freewheel, this could be appreciable.

So until someone else find a source for them.. ( i know that it exist some 14T or 15T single speed freewheel... but...)

Due to the strange and rare X5 axle lengh i have on my 5302, i must shorten my 7 speed 11t freewheel to get enough threaded lenght on the axel.

I thought that for those who would like to save weight and have a 11T gear without the rest of the gear or just to remove some gear when using with hub motor, this could be some good solution.

So here is the pics of my little upgrade

The goal is to save my old gen 5302 that have an Axel lenght problem. Yes i could buy one of those HT motor for 260$.. but it is still cheap to modify that casette by removing the undesirable gear and also to add a disk brake adaptor and weld it with 3M epoxy!


Next step.. : cutting the extra lengh of the clutch that i dont need.. on that diameter... the only lenght i need is to just enough hold in place the 11T gear.. no more... ( Yes.. i'll epoxy it to hold in place with metal aerospace grade epoxy DP-420) :wink:


By doing that i'll save around 10mm on the AXEL.. and save the weight of 6 larger gears

Doc
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Last edited by Doctorbass on Apr 29 2012 6:54pm, edited 2 times in total.
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Doctorbass   100 GW

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Re: Single speed 11T freewheel

Post by Doctorbass » Apr 22 2011 11:12pm

Update 22 april 2011:

My new 5 speed 11T freewheel is finished!

The total lengh is 32mm

I needed to epoxy all the gear together because when they was 8 original speeds, they were all hold together with spacers..

The 5 speed 11T freewheel is really strong!!

Doc
Attachments
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Last edited by Doctorbass on Apr 29 2012 6:55pm, edited 1 time in total.
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
YOUTUBE---https://m.youtube.com/user/Doctorbasss
http://twitter.com/DocbassMelancon
I speak FRENCH and english

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dogman dan   100 GW

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Re: 5 speeds 11T shortened freewheel

Post by dogman dan » Apr 23 2011 6:50am

On my commuter, I often wish I just had a freewheel with several 11 tooth cogs, and maybe one or two more with 14 or 16. You tend to really wear out the 11 tooth gear since you spend 99.9% of your ride in it.

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Re: 5 speeds 11T shortened freewheel

Post by tailwind » Apr 23 2011 8:39am

I cut the first step off the freewheel body, so I couldnt attach the 11t or 13t sprocket.
Three years later it is still going strong.
Thanks for the tip on using epoxy. I will use that next time.

http://endless-sphere.com/forums/viewto ... 420#p63420

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Re: 5 speeds 11T shortened freewheel

Post by deVries » Jul 13 2011 4:13pm

Doctorbass wrote:Yes i could buy one of those HT motor for 260$.. but it is still cheap to modify that casette by removing the undesirable gear and also to add a disk brake adaptor and weld it with 3M epoxy!
Hi Doc,

Have you tried using the 3M epoxy to glue a disk brake adapter? Any pics or video?

Also, do you think it would be safe to add a metal disk brake tab/adapter to the rear dropout bike frame by bonding it with this epoxy? One of my (older) bikes did not come with the disk brake mount on the rear triangle, but maybe an adapter plate could be attached & bonded with 3M epoxy?

What do you think? :?:

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Re: 5 speeds 11T shortened freewheel

Post by fabiograssi » Jul 13 2011 9:13pm

Very nice! I dream with it on my old 9c, but...

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Re: 5 speeds 11T shortened freewheel

Post by neptronix » Jul 13 2011 9:23pm

Hey doc..

I have one of those freewheels. how the hell did you take it apart? what tool do you need?

i tried it with a vice grip and pliers.. no go
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Re: 5 speeds 11T shortened freewheel

Post by Architectonic » Feb 23 2012 6:37am

neptronix wrote:I have one of those freewheels. how the hell did you take it apart? what tool do you need?
An interesting thread and an interesting question...

See also putting DNP 11t onto 6 speed Shimano freewheel (on a Magic Pie):
http://goldenmotor.com/SMF/index.php?topic=2788.0

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Re: 5 speeds 11T shortened freewheel

Post by crusoe » May 03 2012 10:47pm

Hey doc, I'm also wondering how you got the freewheel apart. I need to remove gears to get rid of chain line issues
http://endless-sphere.com/forums/viewto ... =2&t=39393 Any help would be great!

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Re: 5 speeds 11T shortened freewheel

Post by Sacman » May 04 2012 12:22am

crusoe wrote:Hey doc, I'm also wondering how you got the freewheel apart. I need to remove gears to get rid of chain line issues
http://endless-sphere.com/forums/viewto ... =2&t=39393 Any help would be great!
According to Sheldon Brown ... To remove sprockets from a freewheel for replacement or restoration, you normally use two chain whips: one to unscrew the sprocket, the other to prevent the freewheel from rotating backwards. This is easiest with the freewheel installed on the wheel. (found this in the Sprocket Replacement and Restoration section) http://sheldonbrown.com/freewheels.html

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Re: 5 speeds 11T shortened freewheel

Post by NeilP » Oct 28 2014 3:38am

Hey Dr. B

I made a 5 speed the other day too ..out of the new DNP Epoch 7 speed. Got the total width down to about 32mm ( need to check that).

I did not like the idea of glueing the 11 tooth on, so instead turned the splines down, and will re tap the thread, as per the original. Looks like the thread is a M30 x 1.0

I have not threaded yet as I don't fancy doing it on the lathe so waiting for a die to arrive so I can cut it that way.

More info and pics here
http://endless-sphere.com/forums/postin ... =3&t=62844
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