Core e*spec Chainguides

Core e*spec Chainguides offer a lightweight, durable chain retention solution for Bosch® CX Gen4, Gen5, and Shimano® EP8 motor systems, with 55mm chainlines.

Core e*spec Guides are designed to provide the long-lasting performance of an alloy backplate guide, with a wider 55mm chainline for modern Boost and Super Boost e-bikes. They feature a wider offset to accommodate 2-pc chainrings, which often have clearance issues, and our latest e*spec upper sliders, which provide unprecedented retention while improving ease of setup and maintenance. 

• Adjustable upper slider    
  
• Durable aluminum backplate    
  
• Includes ISCG mounting hardware for 55mm chainline     

We use UPS/Fedex to deliver all of our products to ensure they arrive in the best possible condition.

Local pickup is available if selected at checkout.

All products unopened products are eligible for return within 7 days of delivery. Custom orders are subject to a restocking fee.