Pre-tension Bolt for Shimano Hollowtech II Cranks and Shimano E-bike motors.
Simplify things with an 8mm fitting and add a splash of your favourite anodised colour. Never worry about turning the garage upside down at midnight to find that little ‘thingy’ to pre tension your cranks ever again.
Remember this product needs minimal torque and do not exceed the manufacturers maximum recommended torque 0.7 to 1.5Nm.
