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e*thirteen Helix Race Alloy e*spec Crank Arm Set - BOSCH SX-Brose S Mag-TQ HPR50 21.5mm Offset 165mm Self Extractor Silver

e*thirteen Helix Race Alloy e*spec Crank Arm Set - BOSCH SX-Brose S Mag-TQ HPR50 21.5mm Offset 165mm Self Extractor Silver

SKU: CS4HAA-110

e*thirteen
$219.95
$219.95 $219.95
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A high-performance weight-optimized alternative to carbon fiber for riders who prefer alloy cranks. These 24mm ISIS interface cranks are engineered for compatibility with Bosch Gen 4 Brose S Mag TQ HPR 50 Fazua Yamaha Maxon and Specialized Brose motor systems. They come in short lengths starting at 155mm for improved pedal clearance and are tested to E-Enduro standards.
Color Silver
Crank Length (mm) 165
Pedal Spindle 9/16"
Spindle Interface Type ISIS
Designed for ebike Yes
Defined Color Silver
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Ride Bicycles, LLC - since 2010

Welcome to Ride Bicycles! We’re a local, independently owned, full-service bike shop nestled in the heart of the Pacific Northwest. Since 2010, we’ve been dedicated to providing exceptional customer service and helping riders of all levels experience the joy of cycling. As passionate riders, we understand the unique needs of our community and offer personalized attention, mountain bike demos, and a curated selection of high-quality mountain and gravel bikes. Meet our team to discover the people who make Ride Bicycles special and see why we’re the perfect stop for your cycling journey.

Come visit our PNW Headquarters & demo a bike!

Got your eye on a new model or curious about eMTBs? We’re just 30 minutes from Seattle, located near some of the best trails and gravel zones the Pacific Northwest has to offer. Explore our demo fleet and find the perfect ride for your next adventure. Book a demo today and use code DEMODEAL for 10% off! 😎


160 Northwest Gilman Blvd, Suite 102
Issaquah, WA 98027 (425) 961-9061