E Thirteen E Spec Core Chainguide 2026

Ethirteen E*Spec Core Chain Guide: developed for e-bike drivetrains with a 55 mm chainline

The E*spec Core chain guide is specifically designed for e-MTBs with a 55 mm chainline. Built to withstand the power and stresses of e-bikes while maintaining quiet performance, it covers chainrings from 32 to 38 teeth depending on the version and mounts on ISCG tabs for a secure fit.

The construction of this chain guide combines a strong and durable aluminum backplate with a top slider designed to guide the chain, keep it in place, and prevent clothing or branches from getting caught in the drivetrain. This slider is adjustable to fit different chainlines: Boost and SuperBoost.

Delivered with ISCG bolts and, of course, a user manual, this guide is ideal for e-bike riders who want to ride freely without worrying about dropped chains or drivetrain noise.

Features

• Model: E*Spec Core
• Backplate material: Aluminum
• Mount: 2 bolts on ISCG05 system
• Chainring capacity:
    - 32 to 38 teeth (Bosch CX Gen 4)
    - 32 to 36 teeth (Bosch CX Gen 5)
    - 34 to 38 teeth (Shimano EP8)
• Chainline: 55 mm Boost and SuperBoost
• Color: Black
• Compatibility: Drivetrains with 55 mm chainline
• Top guide: Adjustable with removable outer plate for easy maintenance and adjustments
• Motor compatibility
    - Shimano EP8 / E8000 / E7000
    - Bosch CX Gen 4
    - Bosch CX Gen 5

Weight

• 75 g for Bosch Gen 4 version
• 53 g for Bosch Gen 5 version
• 65 g for Shimano EP8/E8000/E7000 version

Included

• E*Spec Core chain guide
• 2 bolts for ISCG05 mount
• User manual