Rene Herse One-By Crank

Rene Herse cranks are ideal for one-by setups: Light, strong and easy to dial in. The one-by chainrings have alternating ‘thick/thin’ teeth that have been optimized to mesh perfectly with the chain. The chain won’t derail and fall off even with the extreme chain angles of 12- and 13-speed drivetrains. Rene Herse One-By cranks have been tested extensively with all 12-speed drivetrains, as well as Campagnolo Ekar 13-speed, to ensure optimum function.

We offer a choice of crankarm configurations: If you’ll only ever want to run a single chainring, our single-specific crankarms are the lightest and most elegant. Or choose our convertible crankarms that use a custom-machined spacer on the chainring tab – that way, it’s easy to install a second (and even third) chainring in the future.

Recommended bottom brackets:

• SKF JIS 107 mm for standard 45 mm chainline
• SKF JIS 110 mm for 48 mm chainline on bikes with widely-spaced chainstays
• Most other bottom brackets have slightly thinner spindles—use a BB spindle that is 2-3 mm longer than SKF.

Rene Herse crank bolts and pedal washers are included. Cranks are custom-assembled based on your order. Please allow 7-10 days until your order can ship.

Pro Tip: With One-By drivetrains, optimizing the chainline is especially important for good shifting and quiet operation. In most cases, that means using the shortest BB spindle that works on your frame. We recommend SKF JIS bottom brackets.