- Crank Arm Material
- 2024 Aluminum
- Chain Ring Material
- 6061 Aluminum
- 564g - 690g
- Crank Arm Finish
- Polished and Anodized
- Chain Ring Finish
- Anodized Color
- Black or Silver
- Crank Arm Length
- 175mm or 180mm
- Chain Ring Size
- Circles 32, 34, 36, 39, 44, 46, or 48
Royal Flush 46 or 48
- Chain Ring Width
- Bottom bracket
- 111mm ISO Square Taper
We designed the Mountain Crank around a 111mm bottom bracket with an ISO square taper.
Suitable bottom brackets are available from Phil Wood, Campagnolo, Miche, and others.
Chainline is the chain ring's offset from the centerline of the bicycle frame.
The Mountain Crank has a 52mm chainline when paired with a 111mm bottom bracket.
Our Mountain Cranks are a great single-ring crank set for single speed mountain bikes, and match the 52mm chainline of our WORD hub.
These cranks use a specially designed interlocking chain ring/crank interface. Four 7075 Aluminum chain ring bolts with T25 Torx heads bolt through the chain ring and into the reinforced spider on the crank arm. We've made the threads even deeper and reinforced the spider making the assembly impossible to strip.
We machine our crank arms from 2024 aluminum, a very strong and stiff material. Then they are given a high polish finish and the black ones get anodized. We currently make two mountain crank arm lengths: 175mm and 180mm. The crank arms have been canted out to clear the wider chainstays of mountain bikes.
The chain rings are machined out of 6.3mm thick aluminum plate; very sturdy. They're currently designed only to work with 1⁄8" chains (track and BMX), and are unpolished. Replacement chain rings are available.
Chain rings are available in two different patterns and seven different sizes. 32, 34, 36, 39, 44, 46 and 48 tooth rings are available in our Circles pattern. Additionally, 46 and 48 tooth rings are available in our Royal Flush suit of cards pattern.