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Rene Herse 9- to 12-Speed Double Cranks

$485.00

Finally a 12- and 11-speed-compatible crank that rivals the very best from the big makers in shifting performance, offers chainring combinations useful for most riders, and the beauty and polish of our Rene Herse cranks. The cranks are designed to be 100% compatible with STI (except 12-speed mtb), Ergopower (all versions) and SRAM (all versions). They work equally well with 9- and 10-speed drivetrains, and also with downtube or bar-end shifters.

The completely new outer chainrings were designed to work with the inner rings as a dynamic system to offer an optimized chain path at 50-130 rpm (and not statically, as with many other chainrings). This ensures smooth and quick shifts even with the steep chain path inherent in the narrow spacing of 12/11-speed chainrings. When using with 10- or 11-speed, we recommend Shimano Ultegra 11-speed chains – even if you run derailleurs and cassettes from other brands, use a Shimano Ultegra 11-speed chain. Existing Rene Herse cranks can be retrofitted to 12- or 11-speed by swapping out the big chainring.

Rene Herse crank bolts and pedal washers are included.

Assembled in Seattle. 10 year warranty.

We recommend SKF bottom brackets 110 mm JIS spindle for Rene Herse double cranks.

Free worldwide shipping for all Rene Herse cranks.

 

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Rene Herse cranks remain unsurpassed in their efficiency. 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. 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: 110-113 mm, JIS taper
  • Length: 165, 171, 177 mm
  • Weight:
    • (165 mm): 522 g (double 46/30).
    • (171 mm): + 6 g.
    • (177 mm): + 38 g (177 mm arms are thicker for added strength).
  • Low tread / Q factor: 142 mm (double)
  • For use with 12-, 11-, 10- and 9-speed drivetrains from SRAM, Campagnolo and Shimano (except Shimano 12-speed mtb)
  • When using with 10- or 11-speed, use Shimano Ultegra chains for best performance (even with Campagnolo or SRAM derailleurs).
  • 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 Rene Herse Cranks, SKF Bottom Brackets, and our chart for using the two together.

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