Precisely machined for a perfect fit, The Park Tool LRT-1 removes and installs the 8-notch 50mm OD lockring that retains the front chainrings found on Bosch Gen 2 electric bicycle motors once the crank arm is removed, including Active Line (chainrings less than 20 teeth), Performance Line and Performance Line CX systems. The 3/8" drive allows compatibility with most ratchet handles and torque wrenches for tightening to proper torque specifications, and the heat treated and plated 4140 steel construction ensures durability and long life.
As with every other component found on a bicycle, Park Tool offers a full line of tools for bicycle lockring chainrings, including many of the most popular e-bike standards:
LRT-1 Chainring Lockring Tool | LRT-2 Chainring Lockring Tool | LRT-3 Chainring Lockring Tool | LRT-4 Chainring Lockring Tool | BBT-18 Chainring Lockring & Bottom Bracket Tool | BBT-49.2 Chainring Lockring & Bottom Bracket Tool | |
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Tool Fitting | 8 Notches - 50mm Outside Diameter | 16 Notches - 54mm Outside Diameter | 4 Or 8 Notches - 47-48mm Outside Diameter | 16 Notches - 41mm Outside Diameter | 8 Notches - 43.4mm Outside Diameter | 16 Notches - 39mm Outside Diameter |
Brand/System Compatibility | Bosch Gen 2 E-Bike Systems Including Active Line (chainrings less than 20 teeth), Performance Line and Performance Line CX models | Shimano STEPS E6100, E7000, E8000 and E9000 E-Bike Systems | Some Specialized, Cannondale and FSA modular cranks | XTR 9120, XT 8120, MT900, and other Shimano direct mount systems | Bosch Gen 3 & Gen 4 E-Bike Systems | Shimano STEPS E6000, E6002, & E6050 E-Bike Systems |
Equivalent Tool | Bosch 0275009003 | Shimano TL-FC39 | Cannondale KT012, FSA E0667 | Shimano TL-FC41 | Shimano TL-FC38 |
Since our origins in the back of a bike shop in 1963, it has been Park Tools sole mission to design and manufacture high-quality tools that empower mechanics and riders of all skill levels to service their bicycles. As with our other 500+ tools, our lockring tools are a product of our decades of experience and expertise in the industry, in the shop and on the trail.