Crankbrothers M19 Multi-Tool

The integrated chain tool is officially rated for 8, 9, and 10-speed chains. While some riders have success using it on higher speeds in emergencies, it is best to use a dedicated tool for 11 or 12-speed drivetrains to avoid damaging the chain pins.

At 175 grams, the M19 is substantial but manageable. It is designed to be carried in a saddlebag or hydration pack rather than a jersey pocket, where the weight might feel noticeable over long rides.

The M19 includes a T-25 Torx bit, which is the standard size for most disc brake rotor bolts. However, it does not include a dedicated rotor truing tool, so it is intended for tightening bolts rather than bending rotors back into alignment.

The stainless steel case is highly resistant to corrosion, making it a reliable choice for riders who frequently encounter mud, rain, or stream crossings. It keeps the internal steel bits protected and clean, though it is still good practice to wipe the tool down after a particularly wet ride.

Yes, the side grips are specifically textured to provide extra traction. This is a significant advantage when you are wearing full-finger cycling gloves or if your hands are sweaty, as it prevents the tool from slipping while you are applying torque to a bolt.

With hex wrenches ranging from #2 to #8, the M19 covers the vast majority of bolts found on modern mountain and road bikes. The inclusion of the #8 hex is particularly useful, as it is often required for pedals and crank bolts.