Self extracting crank bolts
The cleaning and maintenance of a bike chainset is essential to keeping the best possible shifting performance. In addition, standing dirt and grit on the bottom bracket penetrates seals far faster than if it were given a swift clean at the end of a winters day ride.
This simple level of maintenance can never be as comprehensive as it should be without removing your cranks with a crank extract tool - or a pair of Middleburn self-extract bolts.
With our self-extract bolts all that is required is a 6mm allen key - simple. Anti friction washers ensure minimum effort is required. With the bolt sets available in a range of colours they also provide you with the finishing touch to any bike.
Note: Titanium self-extracting bolts are temporarily unavailable.
| materials | 7075 T6 Alloy (outer), stainless steel (inner) | |
| compatibility | square-taper cranks only | |
| weight | 31g (stainless steel), 21g (titanium, temporarily unavailable) | |
| colours | 
Silver 
Black 
Red 
Blue  Gold |
|