Multi-tools live in your saddle bag until something goes wrong, which means they need to handle real repairs without weighing you down or falling apart when you actually need them. Park Tool's IB-1 I-Beam Multi Tool packs 13 functions into a design that borrows its shape from construction I-beams, giving you a rigid central spine that doesn't flex when you're applying torque to a stubborn bolt on the side of the road.

The I-beam shape does more than look different. That central spine creates a natural handle that lets you generate actual leverage, unlike folding tools where you're gripping a stack of loose implements. When you need to tighten a stem bolt or adjust a derailleur limit screw mid-ride, the difference between a tool that flexes and one that stays solid determines whether you finish the repair or limp home.

Hex wrenches cover the sizes you'll encounter on modern bikes: 2mm, 2.5mm, 3mm, 4mm, 5mm, and 6mm. The 4mm and 5mm see the most use on stem bolts, bottle cage mounts, and brake caliper adjustments, but having the smaller sizes means you're not stuck when a derailleur limit screw needs attention. A T25 Torx handles disc brake rotor bolts and the occasional stem faceplate. Phillips and flathead screwdrivers round out the driver selection for older components and accessory mounts.... Read More