alright here it is. I built the first ever 20" suspension fork. I had to cut the stanchions and completly redesign the internals. It weighs 2.9 lbs so its actually lighter than a lot of ridgid forks. If you ran a 24" wheel on the fork it would hit the steerer tube, so its 20" wheel only. THe worst modification is the vee brakes. Its incredibly difficult to get them to work well on a mod.
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it feels great. Basically suspension is almost exactly like ridgid, your not better at a single trick, but it makes u feel safer cause you can really screw something up badly and not break your wrists.