Freewheel issue

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BikeVirgin   10 mW

10 mW
Posts: 20
Joined: Nov 23 2019 6:28pm

Freewheel issue

Post by BikeVirgin » Nov 23 2019 6:47pm

Hi. Please could you help. I've just bought a rear hub with a 7 gear free wheel. The small cog is very close to the dropout and frame. There is no room to insert washer. What are my options other than locking out that small cog. Could I replace the freewheel with another one. The original gearing is 8 on the handlebars! Many thanks

Balmorhea   1 kW

1 kW
Posts: 301
Joined: Oct 01 2019 8:30pm

Re: Freewheel issue

Post by Balmorhea » Nov 23 2019 7:25pm

Replace with a 6 speed freewheel and 6 speed shifter.

These are very cheap and durable. With electric assist, you won't miss the extra gears.

BikeVirgin   10 mW

10 mW
Posts: 20
Joined: Nov 23 2019 6:28pm

Re: Freewheel issue

Post by BikeVirgin » Nov 24 2019 6:11am

Thank you for the advice. :thumb:

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TommyCat   1 kW

1 kW
Posts: 368
Joined: Jan 22 2018 8:05pm
Location: North-west Illinois, USA

Re: Freewheel issue

Post by TommyCat » Nov 24 2019 10:49am

On mine I was able to use a cut down nut similar to the one on the far right hand side(used as a jam nut) in this picture.


Image

With it tightened down to the where the threads end (closest to the motor), which happened to be about even with the free wheel side. (But not touching) It made a good backstop to tighten the dropout to. Then shimming with a washer to get the last gear to easily clear. Now I did have to spread the dropout a couple mms. But with a steel frame it was a non-issue.

Image


Regards,
T.C.
See my completed Magic Pie V5 rear hub E-Bike build Here!

Voltron   10 MW

10 MW
Posts: 2172
Joined: May 02 2013 4:53pm
Location: Santa Barbara CA

Re: Freewheel issue

Post by Voltron » Nov 24 2019 11:32am

They sell a couple of different thicknesses of these, one should fit without spreading the frame much, with the hook pointing out away from the freewheel. The one pictured is pretty thick, they also sell thinner ones.

One consideration if you do use a washer, a regular round hole one isn't supported the whole way around the circle because of the axle flats, and can push over onto the axle too far after the nut is tightened, sometimes during riding, which makes the nut go loose, which can lead to spinning the axle in the dropout.

P.S. I wouldn't use one in a fork like the picture shows btw, esp with what looks like heavily filed dropouts to get the motor axle to fit... They're just begging for the fork tips to blow up!
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BikeVirgin   10 mW

10 mW
Posts: 20
Joined: Nov 23 2019 6:28pm

Re: Freewheel issue

Post by BikeVirgin » Nov 25 2019 2:12pm

Thanks guys for the response and pictures. I wish my dropouts were that deep.

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