Ultimate Wheel Crank Length

Can anybody tell me a good crank size for an ultimate wheel?

I would think that smaller would be better, as your input would have less effect on the wheel, hopefully reducing wobble, but having a longer length means more control, and many comercial producers make them with long crank lengths.

I am using a 24" rim, and I am making one with plywood disk in the center, so I could make the crank length any size I like.

i put mine 5" from the outer diameter of the rim, and that seems to work well

What is a good crank size for a 26 " rim


Just to let you know…
considering that you’re making a six spoke ultimate wheel… you can let it have 3 different cranck sizes.

I built my 26er with 125mm and it works pretty well.

16 years later

Holy thread resurrection batman!


My 29er is is set at 115mm and my 36er is is set at 110mm. And the custom modified wheel shields totally prevent legs rubbing against tire! .

Are the cutouts meant to provide places to grip the wheel so that you can hop?

I would think it’s to allow cross winds to pass through. Apart from the cutouts to help pump up the tyre.

Almost certainly helps with weight reduction too. A plywood ultimate wheel is heavy, even at much smaller wheel sizes.

Mostly for weight reduction. I chose to make the plywood disc 1/2 inch thick rather than the more common 3/4 inch, so it’s way lighter, but sufficiently strong with no stability issues. Rides smooth and true.

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