If you are replacing rotors or looking to upgrade

Chain stabilising technology makes for a quiet drivetrain in all gear positions and reduces chain drop

But this simplification

The Topeak Joe Blow Mountain X Floor Pump is a mountain bike specific pump that claims to inflate tyres/tubes 50% faster than your standard bike pump

they'll just be slow (but that's what the motor is for

Smith Mountain Pilot Mips Helmet - S - Matte Gravy Images Uploaded - Ready for Review If you are replacing rotorsBuckle up and hit the trail. The Smith Pilot mountain bike helmet is the total package for trail riding. It combines a durable, lightweight build with elevated safety tech and on the fly adjustability. A MIPS liner system helps reduce angle impact forces in a crash, and fixed vents provide the airflow you need to stay comfortable through climbs and descents. An easy to use dial lets you fine tune the fit, and side channels let you secure your shades