This morning I decided to ride to work on my Schlumpf 36er. About a mile away from home, after stopping at a light, I shifted into high-gear. After several rotations, I found myself being intimate with the pavement. It became immediately apparent why. My Schlumpf crank arm was sitting on the pavment, have snapped clean off. Luckily I wasn’t going very fast when this happened.
Likely, I own too many unicycles, and I was still able to ride to work on my Nimbus 36.
So, I need new cranks. I’m thinking steel might be the way to go since they’re more likely to bend without breaking, and I fear what would have happened had I been going 20+mph downhill when it broke.
Does anybody have recommendations about strong cranks that work well with a Schlumpf? I’ll probably get two sets, 152s 140s.
I know that Joe Marshall and Spencer both had their 150mm Schlumpf cranks break as well. I am not sure what brand they are using now…it might be the ProWheel ones though.
Ouch, hope you’re OK. Good excuse to try out those 140s we’ve been talking about. (And, mental note: extra square taper cranks in the spare parts bin for RTL).
I think the ProWheel cranks are what Jimbo is using; they’ve got a sort of annoying Q-factor.
I have a set of cheap 150mm steel cranks (straight) you can borrow/have. I can’t imagine ever wanting to put 150mm square taper cranks on anything I’m likely to own. I’ll be home after 8 tonight.
I also wonder if using cranks with no q-factor is ideal for a schlumpf. I would think you would want a little q-factor so you are not too close to the shifting button. I think the KH moments have about 10mm q and that seems to work great. I haven’t tried straight cranks on a schlumpf before though, so I am just speculating.
I’m fine, just added a couple more scuffs to my collection.
The Q might be OK. I mainly don’t like the ProWheels for unicycles that have the extra-wide hub since it’s already pretty wide on its own. I have ProWheels on v54.
I just worry about them because they’re aluminum. Unfortunately, UDC does have much in stock in the way of high quality steel cranks, and by that I mean they have nothing.
My other option is the pricy Black Widows, which appear to have very little added Q, and they’re not available in 140mm.
I was debating switching to some light weight Qu-Ax ISIS cranks for use with the KH Schlumpf 29er. How do the light weight cranks compare to the Moments?
They’re light; in your hand, the difference is pretty dramatic. On the unicycle, I don’t think I notice the difference that much, but it probably makes spinning a little less wobbly. It took quite a bit of torque, and a 100km ride where one of the cranks kept coming loose all day, to get the Qu-Ax cranks tight enough to stay on, but since I bought the silly 6mm torque wrench bit and tightened them down, they’ve been fine.
Thanks for the info…if they didn’t make a significant difference I think I will stay with the dual drilled moments since I already have them torqued on there well and don’t want to go through all that hassle again.
Yeah. They’re great. They have got a bit more Q than the original Schlumpf ones, but that really doesn’t seem to be a problem. If anything, it is easier to shift now, although that could be because I went from 152mm to 127, and also changed my riding shoes at the same time.