Rene Herse Tandem Double Crank


Rene Herse cranks are a modern classic. Thanks to their smart design and net-shape forging, they are among the lightest cranks available today, while offering a great choice of chainrings: from 52 to 24 teeth. Whether you want a classic racing double or ultra-compact cranks to match your pedaling style, Rene Herse cranks are available with the chainring combination you need.

Rene Herse with standard rings are compatible with 5- to 9-speed systems. For 9/10/11-speed drivetrains, choose our ramped-and-pinned 11-speed chainrings.

Rene Herse crank bolts and pedal washers are included. Choose your chainring combination:

Outer Chainring (teeth)
(5–9 speed compatible)
52 50 48 46 44 42

(9/10/11 speed compatible)
48-33 46-30 44-28 42-26

Inner Ring (teeth)
44 42 38 36 34 33 32 30 28 26 24

Tandem Left-Side (teeth)

Crank length: Arm pair with double chainrings are “drive arms”; the other set (right crank without chainring) are “connecting arms.”

Assembled in Seattle from Taiwan-made parts. 10 year warranty.

We recommend SKF bottom brackets (JIS spindle) for Rene Herse cranks.


René Herse cranks remain unsurpassed in their efficiency. The small 70 mm bolt circle allows you to use any chainring combination from 24 teeth upward. The minimalist design with three arms makes this one of the lightest cranks ever made, yet the chainrings are well-supported, and standard chainring bolts are used. Choose between single, double and triple cranks. A double crank can be changed to triple by using triple chainring bolts and adding an inner/middle ring.

We’ve updated René Herse’s classic design by curving the arms slightly. This provides additional heel clearance and allows use of a shorter bottom bracket spindle. We forge the arms out of the strongest aluminum, and we machine the chainrings out of ultra-hard 7000-series aluminum for optimum wear resistance. We custom-make our bolts. Producing such a minimalist design requires very tight tolerances and superior quality. That is why we have a dedicated engineer supervising the production at our suppliers.

Thanks to our net-shape forging process (which has a dedicated forging die for each crank length), René Herse cranks are the only classic cranks that pass the most stringent EN “Racing Bike” standard for fatigue resistance. They have proven themselves over tens of thousands of miles of hard riding.

  • Bottom bracket (drive arms): 113 mm, JIS taper
  • Bottom bracket (connecting arms): length see frame specs, JIS taper
  • Low tread/ Q factor: 142 mm (double, drive arms)
  • Compatible with most drivetrains (up to 10-speed)
  • Length: 165, 171, 177 mm
  • Weight: 540 g (double 171 mm), varies with chainring sizes
  • Forged 2014 arms for high strength
  • CNC-machined 7075 chainrings for long wear
  • Meets EN “Racing Bike” standard for fatigue resistance
  • Click here for downloadable instructions for René Herse Cranks, SKF Bottom Brackets, and our chart for using the two together.

You may also like…