Fit A Shimano Hollowtech Bottom Bracket On A Bike

Introduction

A Shimano Hollowtech bottom bracket may have a shell made of metal or tough plastic.

Step 1

Tools - Fit A Shimano Hollowtech Bottom Bracket On A Bike

Tools

Shimano Hollowtech bottom brackets need a special ring spanner that fits into splines and allows each side to be screwed in and out.

Step 2

Grease - Fit A Shimano Hollowtech Bottom Bracket On A Bike

Grease

Clean the threads on the frame and grease them with anti-seize assembly grease.

Step 3

Left To Right - Fit A Shimano Hollowtech Bottom Bracket On A Bike

Left To Right

The unit is marked 'L' and 'R'. The right element contains the axel sleeve.

Step 4

Right - Fit A Shimano Hollowtech Bottom Bracket On A Bike

Right

Carefully introduce the right side of the Shimano Hollowtech bottom bracket into the threads, screwing anti-clockwise. Finger power is enough. Too much force may damage the threads.

Step 5

Left - Fit A Shimano Hollowtech Bottom Bracket On A Bike

Left

Introduce the left element into the other side and screw it in carefully with your fingers.

Step 6

Right again - Fit A Shimano Hollowtech Bottom Bracket On A Bike

Right again

Use the ring spanner to screw the right side of the Shimano Hollowtech bottom bracket tight

Step 7

Left again - Fit A Shimano Hollowtech Bottom Bracket On A Bike

Left again

Use the ring spanner to tighten the left side.

Step 8

 - Fit A Shimano Hollowtech Bottom Bracket On A Bike

Remount the cranks.