Trials Crank Arms: Impact "Eiffel Tower"

Unicycles and Equipment
1

Been thinking about getting longer crank arms for my trials uni; currently running 125’s. I have read a lot on here about how trials crank arms usually range from 137 - 150 and was wondering which length people suggest. I was leaning more towards 140’s but was wondering if I wanted to do some street/flatland tricks could/would I be able to do that stuff on this uni with longer crank arms?

From what I’ve seen on here I should be able to do street and flat land on a trials uni…how far off am I on this one?

Thanks!

2

You can definitely do street and flatland on a trials unicycle. I rode flatland on a Nimbus Trials Unicycle with 137mm cranks for quite a while and it was totally fine. That being said you can also ride trials with 125mm cranks. It really depends on which style you plan to ride more.

3
  • 1

People tend to preffer shorter cranks for street and flat and longer for trials.

I’ve seen people to both on 150’s and someone get enough speed to jump a 12 set w/ 145’s.

4

150’s…man that’s pretty long. So another question I had was, will I notice much of a difference if it got a pair of KH 137’s instead of my current 125’s? If so, is there really that big of a difference between 137’s and 140’s?

5

You should easily notice a difference between 125’s and 137’s. The difference between 137’s and 140’s is much smaller and probably won’t be noticeable.

6

WEEEELL then, guess I’m gonna have to go with the KH 137 moments. Are the Rollo Disks worth the money?

7

How much Q-factor a cranks has can make more of a difference than length. More = better control at slow to moderate speeds but more wobble at high speeds.

I don’t know if this is true or not but that wobble may affect riding really thin skinnies like a 2" round pipe. I can’t ride anything I’d consider skinny but for my riding I like lots of Q, I’ve never ridden a crank that I felt had too much.

Ventures have virtually no Q, Moments a bit more. Qu-Ax 10 sline cranks have a lot more Q (more than any other crank I’ve tried), so I would guess their ISIS cranks are similar, but I’d ask UDC.UK about those and the Eiffel Towers. The older KH-Onza cranks have more Q than the Moments, I think it’s less than the Qu-Ax 10 spline, but I’m not sure.