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Fixed gear mountain bike

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Fixed gear mountain bike

Old 04-26-21, 12:36 PM
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REV160
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Fixed gear mountain bike

I've a very old Specialized Rockhopper that was built with horizontal dropouts. I've used it as a fixie for winters and as a townie for years. Because the frame has 135mm dropouts and the flip/flop hub axle can only go to 130mm, I've been using a quick release. I don't like the QR because the hub can slip when climbing a tough hill under torque and just because it is much harder to adjust chain tension. With a QR, I can not tighten bolts on either side one at a time to "walk" the hub into place. Does anyone have any experience with swapping out an axle that takes a QR and substituting a solid bolt-on axle? If I can do that swap, I can cold set the dropouts down to 130mm to make it work. If relevant, the hub is a Sovos cup and cone type.
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Old 04-26-21, 03:52 PM
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It shouldn't be a problem. Wheels Mfg. has a selection of axles to choose from, e.g.:


https://wheelsmfg.com/products/hub-p...s/axle-06.html
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Old 04-29-21, 12:42 PM
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Use a Surly Tugnut to hold it in place. It comes with washers so it will work with a skewer.
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Old 04-29-21, 06:05 PM
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Or if you can find a disc rear wheel, you could put a bolt-on cog. Although it would change your chainline a bit.
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Old 04-29-21, 06:20 PM
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This is what you want and what you really need:
https://www.paulcomp.com/shop/compon...bs/fixed-word/
Bolt on 135 fixed/free and you are golden my friend.

Paul has been doing single speed and fixed gear MTB stuff for quite a while and certainly has kept his business going so he can continue making awesome parts that aren't just for SSMTB.
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Old 04-30-21, 12:09 AM
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Originally Posted by veganbikes View Post
This is what you want and what you really need:
https://www.paulcomp.com/shop/compon...bs/fixed-word/
Bolt on 135 fixed/free and you are golden my friend.

Good call. Or get Surly's version, with thread-in bolts and a hollow axle, should you ever want to go back to QR.


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Old 05-21-21, 04:52 PM
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Originally Posted by Dylansbob View Post
Or if you can find a disc rear wheel, you could put a bolt-on cog. Although it would change your chainline a bit.
just do this. Then go for a ride.
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