[{"id":686518468978,"handle":"all-products","title":"All Products","updated_at":"2025-12-12T04:06:22-08:00","body_html":"","published_at":"2025-12-04T17:17:42-08:00","sort_order":"best-selling","template_suffix":"","disjunctive":false,"rules":[{"column":"variant_price","relation":"greater_than","condition":"0"},{"column":"variant_inventory","relation":"greater_than","condition":"0"}],"published_scope":"global"},{"id":686518567282,"handle":"best-sellers","title":"Best Sellers","updated_at":"2025-12-12T04:06:22-08:00","body_html":"","published_at":"2025-12-04T17:22:56-08:00","sort_order":"best-selling","template_suffix":"","disjunctive":false,"rules":[{"column":"variant_inventory","relation":"greater_than","condition":"0"},{"column":"tag","relation":"not_equals","condition":"service parts"}],"published_scope":"global"},{"id":686708490610,"handle":"crankmas","updated_at":"2025-12-12T14:44:22-08:00","published_at":"2025-12-12T09:14:48-08:00","sort_order":"manual","template_suffix":"deals-collection","published_scope":"global","title":"Crankmas","body_html":"\u003cp\u003eWelcome to Crankmas: December 12–16. \u003cstrong\u003eUse code CRANKMAS\u003c\/strong\u003e for 30% off cranks and more. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis code applies to full-price items listed below, or sale items with less than a 30% discount\u003c\/strong\u003e. Other select drivetrain components and pedals are discounted by up to 65%.\u003c\/p\u003e\n\u003cp\u003eDecember 16th is the order deadline for guaranteed delivery before Christmas.\u003c\/p\u003e"},{"id":685866713458,"handle":"deals","title":"Deals","updated_at":"2025-12-12T04:06:22-08:00","body_html":"Score deals up to 75% off on select e*thirteen MTB components on sale. Stock is limited. Grab what you need before it's gone.","published_at":"2025-11-20T10:23:48-08:00","sort_order":"manual","template_suffix":"deals-collection","disjunctive":false,"rules":[{"column":"tag","relation":"equals","condition":"clearance"},{"column":"tag","relation":"equals","condition":"b2c"}],"published_scope":"global"},{"id":621466943858,"handle":"e-spec-cranks","title":"E-MTB Cranks","updated_at":"2025-12-12T04:06:22-08:00","body_html":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003ePurpose-built for the demands of electric mountain bikes. Every e*spec crank is engineered for E-MTB strength and available in shorter lengths for improved pedal clearance on modern low-BB geometries. From the ultralight Helix Race Carbon to the value-driven Helix Core alloy, there's an option for every build and budget. Wide motor compatibility covers Bosch®, Brose®, TQ®, Fazua®, Avinox®, and Specialized® systems, with customizable offsets to dial in your Q-factor and ride feel. Self-extracting crank bolts make service simple. Molded impact boots keep you confident when pedal strikes happen.\u003c\/p\u003e","published_at":"2025-04-15T19:54:25-07:00","sort_order":"manual","template_suffix":"emtb-cranks-collection","disjunctive":false,"rules":[{"column":"tag","relation":"equals","condition":"crank"},{"column":"tag","relation":"equals","condition":"e*spec"},{"column":"tag","relation":"equals","condition":"component"}],"published_scope":"global","image":{"created_at":"2025-04-15T20:52:56-07:00","alt":null,"width":1956,"height":1956,"src":"\/\/www.ethirteen.com\/cdn\/shop\/collections\/CS4EAA-105_06.jpg?v=1744775576"}}]
Save 35% on Bosch and Brose models while supplies last!
We're bringing our World Cup proven technology to the eBike marketplace, with our e*spec Race Carbon Cranks.
In contrast to our Gen3 carbon cranks, the Q Factor, overall profile, and volume of our Gen4 cranks has been greatly reduced. Bosch®, Brose®, TQ®, Fazua® e*spec cranks have an 8mm self-extractor built in to both arms for easy removal of press-fit versions. Shimano EP8 Cranks are compatible with EP8, EP800, and E8000/7000 motor systems. E8000/7000 require adapter kit CSS30-114. They're designed with a lightweight single bolt spindle clamp and alloy preload caps, with crank boots for added impact resistance.
Available for Bosch Gen4 CX, Brose S Mag drive, Fazua Ride 50, TQ and Shimano EP8.
Chainring
e*spec Direct Mount Chainrings
Color
Stealth Black w/Protective Vinyl
Compatibility
Bosch CX Gen4
Brose S Mag also compatible with Fazua and TQ Motors
NOT compatible with Fazua Ride 60 with ETOR spindle
Shimano EP8 also compatible with EP800, and E8000/7000 (with adapter)
Features
World Cup proven layup. Slim Q factor, overall profile, and volume. 8mm self-extractor in each arm.
Impact resistant crank boots
Shimano EP8 include alloy preload caps
