The Park Tool BBT-118 Steel Bottom Bracket / Lockring Tool is a heavy-duty bicycle workshop tool machined from 4140 steel for removal and installation of components with eight-notch tool fittings. Suited for mechanics working across Shimano Octalink external cup bottom brackets, ISIS Drive cups from Truvativ and Bontrager, and front chainring lockrings on Bosch Gen 3, Gen 4, and Gen 5 e-bike systems as well as Specialized Levo Brose systems, the BBT-118 covers a wide range of drivetrain and e-bike service tasks with a single tool. The extra-deep body accommodates extra-wide spindles, while low-profile walls at the point of engagement allow the tool to reach recessed lockrings that shallower tools cannot access. Three drive options — a 3/8" drive fitting, a 1" hex fitting, and 36mm wrench flats — give the mechanic multiple engagement methods for tackling seized components. Internal clearance measures 31.14mm depth by 22.48mm diameter, with a nominal inside diameter of 37.6mm and outside diameter of 42.7mm at the eight-notch engagement.
Machined from 4140 steel for heavy-duty workshop use
Eight-notch tool fitting with a nominal inside diameter of 37.6mm and outside diameter of 42.7mm
Extra-deep body accommodates extra-wide spindles
Low-profile walls at the point of engagement reach recessed lockrings
Three drive options: 3/8" drive fitting, 1" hex fitting, and 36mm wrench flats
Internal clearance: 31.14mm (1.226") depth x 22.48mm (0.885") diameter
Compatible with Bosch Gen 3, Gen 4, and Gen 5 e-bike chainring lockrings and Specialized Levo Brose systems
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Joshua
⭐⭐⭐⭐⭐
Everything was great. Was waiting for the SL9 to release since the first leak. Going from a SL7 was night and day.
Also Sierra Bicycle Supply, was amazing. Will be shopping here plenty more. The service they displayed was top tier, from the order placing online all the way to the delivery.
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Everything was great. Was waiting for the SL9 to release since the first leak. Going from a SL7 was night and day.
Also Sierra Bicycle Supply, was amazing. Will be shopping here plenty more. The service they displayed was top tier, from the order placing online all the way to the delivery.
After many years I wore out my derailleur gears. Since I ride on my wind trainer daily, I needed to get up and riding again. Riding us part of my cancer therapy. Replacing the gears was a quick and easy way to fix the problem. Cost was fine and the delivery was fast. Thank you.
Got this for my kids bike. He does XC racing. Has been riding in dry lose dirt, wet conditions. Lots of climbing and some downhill. He loves them. Shipped fast and in sexure packaging. I would definitely buy again.
