The Crank Brothers M13 covers the core tools you need for most trailside repairs in a compact folding multi-tool that weighs 164 grams with its storage case. The high tensile steel construction handles regular use without the tool tips flexing when you apply torque, and Crank Brothers backs it with a lifetime warranty. The storage case clips directly onto the multi-tool body and holds two tubeless tire plugs plus a fork-style plug installation tool. You can also store chain quick links or other small parts in the case when you're not using the plugs.

The tool includes hex wrenches in 2, 2.5, 3, 4, 5, 6, and 8mm sizes, which handles most modern mountain bike hardware from stem bolts to saddle clamps. The tubeless plug tool uses a fork design that grabs the stem of the plug and pushes it through from inside the tire, which is the same method most tubeless repair systems use. The plugs are rated to 40 PSI maximum tire pressure. That works for trail and all-mountain riding but may not hold at higher pressures if you're running narrower tires pumped up harder.

You get two Phillips head screwdrivers in size 1 and 2, a flat screwdriver, and Torx bits in T10 and T25 sizes. Side grips on the tool body give you something to hold onto when you're working with gloves on, which helps when you're trying to get leverage on a stubborn bolt. The case measures 89mm by 47mm by 19mm when closed, so it fits in most jersey pockets or saddle bags without taking up much room. This is the stripped-down version of the M-series lineup, so you're not getting chain tools, spoke wrenches, or valve core removers. If you need those tools, look at the M20 instead. But if you want something compact that covers basic adjustments and tubeless repairs, the M13 handles that without adding extra weight to your pack. Crank Brothers sells plug refill kits separately when you use up the included pair.