Park Tool BBT-118 Steel Bottom Bracket & Lockring Tool (Black)

Park Tool BBT-118 Steel Bottom Bracket & Lockring Tool Description:

The Park Tool BBT-118 Steel Bottom Bracket & Lockring Tool is a rugged, shop quality tool specifically designed for the installation and removal of select bottom brackets and e-bike chainring lockrings with 8-notch tool fittings. Precisely machined 4140 tool steel ensures long life, and a 3/8″ ratchet, a 1″ hex fitting, and 36mm wrench flats give plenty of options for applying the leverage needed to remove the most stubborn components.

Note: This tool is not rated for use with impact tools/drivers.

Features:

• Heavy duty shop quality bottom bracket/chainring lockring tool
• A precision machined 4140 steel tool for the installation and removal of select threaded bottom brackets and lockrings with 8-notch tool fittings
• 8 notches with a nominal inside diameter of 37.6mm and an outside diameter of 42.7mm
• Extra-deep body to accommodate extra-wide spindles and low-profile walls at the point of engagement, with an internal clearance of 31.14 mm (1.226″) depth (from tool face) x 22.48 mm (0.885″) diameter
• Three methods of tool engagement, with a 3/8″ drive fitting, a 1″ hex fitting, and 36 mm wrench flats that give plenty of leverage options for removing seized components

Can be used to install/remove (among others):

• ISIS Drive Bottom Bracket Cups (including Truvativ and Bontrager)
• Truvativ Giga Pipe Threaded Bottom Bracket
• Shimano Octalink Drive-Side Bottom Bracket cups w/ External Notches
• Chainring Lockring For Bosch Gen 3, Gen 4, and Gen 5 E-Bike Motors
• Chainring Lockring For Specialized® Levo Brose E-Bike Motors

This product was added to our catalog on June 5, 2026