ethirteen Core e*spec Chainguides

ethirteen Core e*spec Chainguides Info

The Core e*spec Chainguides from ethirteen deliver dependable, lightweight chain retention specifically engineered for modern e-MTB systems. Designed for Bosch CX Gen4/Gen5 and Shimano EP8 motors running a 55 mm chainline, these guides bring the stability and longevity of an alloy-backplate design into a platform optimized for today’s higher-torque, Boost and Super Boost–equipped e-bikes.

Built around a wider offset, the Core e*spec Chainguide accommodates 2-piece chainrings—an increasingly common configuration on e-MTBs that can create clearance challenges for traditional retention systems. ethirteen’s latest e*spec upper slider provides exceptional chain security while simplifying setup, adjustment, and ongoing maintenance. The result is a guide that keeps the chain locked in place through rough terrain and heavy motor assist without adding unnecessary bulk.

With its durable aluminum backplate and included ISCG hardware, the Core e*spec Chainguide installs quickly and integrates seamlessly with e-MTB drivetrains. Whether you’re hitting rocky climbs, charging technical descents, or riding long-range loops where reliability matters most, this guide delivers the retention and confidence that high-power pedal-assist bikes demand.

Core e*spec Chainguide Specs

• Intended Use: Chain retention for e-MTBs using Bosch CX Gen4/Gen5 or Shimano EP8 motors.
• Chainline: Designed for wide 55 mm chainlines on Boost and Super Boost e-bikes.
• Backplate: Lightweight, durable aluminum construction.
• Upper Slider: Latest e*spec slider design for high retention and easy adjustment.
• Chainring Compatibility: Wide offset supports 2-piece chainrings with improved clearance.
• Mounting: Includes ISCG hardware for straightforward installation.

Design Benefits

1. Enhanced e-MTB chain security: Engineered to handle the added torque and rough terrain of electric assist riding.
2. Optimized for wide chainlines: Purpose-built for 55 mm chainlines common on modern e-bike drivetrains.
3. Durable construction: Alloy backplate ensures long-lasting performance and reliability.
4. Easy setup and service: Adjustable slider streamlines tuning and maintenance.

Final Take

ethirteen’s Core e*spec Chainguides provide a robust, e-MTB–specific solution for riders who want maximum chain retention without unnecessary weight. Purpose-built for today’s powerful motor systems and wide chainline standards, they add confidence and durability to any performance-focused electric mountain bike.