Mountain Crank
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100% Pure Crank now available from Paul. Our Mountain Cranks are a great single-ring crank set for single speed mountain bikes, and match the 52mm chain-line 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 ⅛" chains (track and bmx), and are unpolished. Replacement chain rings are available. Chain rings are available in two different patterns and six different sizes. 32, 34, 36, 39, 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. Now for the important part. There are two square taper designs in use today, JIS (Shimano, and pretty much everyone else except Campagnolo), and ISO which is used by Campagnolo. We designed our cranks around Campagnolo 111mm width spindles, so that's what you should use. They make a really affordable one called the ACH, and they make some really nice expensive ones too. We also strongly recommend the Phil Wood 110.5 Campy taper bottom backet which lets you fine tune the chain-line. Tech Info:
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