Remove 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 - Remove A Shimano Hollowtech Bottom Bracket On A Bike

Tools

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

Step 2

Acces the bottom bracket - Remove A Shimano Hollowtech Bottom Bracket On A Bike

Acces the bottom bracket

Remove the cranks

Step 3

Ring spanner - Remove A Shimano Hollowtech Bottom Bracket On A Bike

Ring spanner

Push the ring spanner onto the external splines on the left side of the Shimano Hollowtech bottom bracket. Hold it in place with one hand while you apply torque with the other

Step 4

Loosen The Left - Remove A Shimano Hollowtech Bottom Bracket On A Bike

Loosen The Left

Start the left-hand cup moving anti-clockwise

Step 5

Loosen And Remove The Right Side of theBottom Bracket - Remove A Shimano Hollowtech Bottom Bracket On A Bike

Loosen And Remove The Right Side of theBottom Bracket

Move the ring spanner to the right side of the Shimano Hollowtech bottom bracket and start it moving clockwise. Keep going until the unit comes out.

Step 6

Return To The Left - Remove A Shimano Hollowtech Bottom Bracket On A Bike

Return To The Left

Move back to the left side and unscrew the rest of the unit. You may or may not need to use the ring spanner for this.