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Rigid fork for Mtn Bike(4 posts)

Rigid fork for Mtn BikeB2
Nov 16, 2002 9:37 AM
I've got a couple of older mountian bikes that both have the same length head tube. One with a suspension fork and one with a rigid fork. I'd like to swap the forks out between frames. The rigid fork frame is about 1990 vintage and the suspension fork frame is a 1996 if that matters.

The bottom of the head tube sits quite a bit higher (further from the wheel center) with the suspension fork, even when normally loaded. This is just an in town knock around bike. Should I be worried about creating some drastic changes in geometry and handling?


BTW - Rough measurement of the rigid fork length is 395mm
re: Rigid fork for Mtn BikeLC
Nov 16, 2002 5:51 PM
No it will work fine, but the stering will feel slower. You will just have to adjust the seat angle.
One possible complication...Silverback
Nov 17, 2002 10:09 AM
You don't say if they're both either threadless or threaded steerer tubes. If they're the same, AND if they're both the same size, you should be fine. From memory, though (which may be inaccurate), 1996 is about when the switch from threaded to threadless began and when bikes started showing up with 1-1/8 inch instead of 1-inch headsets. Check that before you start pulling things apart.
One possible complication...B2
Nov 17, 2002 6:00 PM
Thanks for the advice.

Both forks are 1" threaded with 140mm steer tubes. Ran into a problem though. The race diameter on the rigid fork steerer was a little bigger than the one on the suspension fork.

Solution was pretty easy. I found a used fork at Recycled Cycles for $10 that was 1" threaded x 140mm with the 26.??mm race diameter. Just finished installing and took a spin up and down the block a few times. Seems to work just fine. I'll ride into work tomorrow and give it a better test.