Shimano STEPS Chainring Lockring Tool — E6100 / E7000 / E8000 / E9000 / EP8
This is a dedicated lockring tool for installing and removing Shimano STEPS e-bike chainring lockrings.
It’s built for proper torque application on Shimano mid-drive systems and replaces Shimano’s TL-FC39 service tool.
Key Functional Details
- Designed for Shimano STEPS chainring lockrings
- Compatible with E6100, E7000, E8000, E9000, and EP8 drive units
- CNC-machined aluminum construction
- Red anodized finish for easy visibility in the shop
- Interfaces with 1/2" drive torque wrenches
- Compatible with Unior 1725/CF crowfoot for proper torque application
- Direct replacement for Shimano TL-FC39
Compatibility & Technical Notes
- Fits Shimano STEPS chainring lockrings only
- Compatible with Shimano STEPS E6100, E7000, E8000, E9000, and EP8 motors
- Designed for use with 1/2" drive torque wrench
- NOT compatible with standard Hollowtech II crank systems
- NOT compatible with non-STEPS e-bike motors
- Tool only — does not include crowfoot or torque wrench
Service / Ownership Context
This is a purpose-built e-bike service tool meant for correct chainring installation and removal. Proper torque is critical on STEPS systems to prevent creaks, loosening, and premature spline wear.
Fit & Use Signals
- Good Fit: Shops and home mechanics servicing Shimano STEPS e-bikes.
- Not A Fit: Standard bicycles, non-Shimano e-bike motors, or riders looking for a general crank tool.
This is a real e-bike service tool, not optional fluff.
STEPS chainrings must be torqued correctly. If they aren’t, you get creaks, loose rings, and eventually chewed splines on expensive motors.
Biggest customer mistake: trying to remove these lockrings with punches, hammers, or generic spanners. That destroys lockrings fast.
Second mistake: reinstalling without a torque wrench. Hand-tight isn’t enough on STEPS.
Aluminum body is fine because it’s meant to be used with proper torque — not impact tools.
Who this is really for: shops or serious home mechanics servicing Shimano mid-drive e-bikes.
Who should avoid: anyone without a torque wrench or anyone not working on STEPS systems.
Typical service scenario: chainring replacement, deep drivetrain cleaning, or motor service.
Mechanic advice: always clean threads, apply light grease, torque to Shimano spec, and re-check after first ride. These motors don’t tolerate sloppy installs.