Somewhere on the trail, a rattling bolt or a punctured tubeless tire turns a good ride into a long walk unless you're carrying the right fix. The M13 from Crank Brothers is the trimmer end of the brand's M-Series, built around 13 high tensile steel tools and, notably, an integrated tubeless tire plug tool. It runs machined alloy side rails with stainless steel through-bolt tool axles, and the whole package weighs 164 grams at 89mm long, which puts it right in the sweet spot for a hydration pack, frame bag, or saddle bag rather than a jersey pocket.

The function count covers the fasteners you actually meet on the trail: 2, 2.5, 3, 4, 5, 6, and 8mm hex wrenches, Torx T-10 and T-25, plus Phillips #1 and #2 and a flat #1 screwdriver. The hex range handles everything from stem and bottle cage bolts up to the 8mm heads on some crank and pedal hardware, and the two Torx sizes cover disc rotor bolts and a lot of modern accessory mounting. The side grips give you a secure hold even with gloves on or hands that have been banging along rough singletrack for a couple of hours.

The standout is the tubeless repair setup. The M13 has an integrated plug tool, and it ships with a shallow storage case that clips directly onto the tool's rails and holds five tire plugs, keeping them clean, dry, and sticky until you need them. That case does double duty as chain quick-link storage, so you can stash a spare link right alongside the plugs. Plug repairs on the M13 are rated for tire pressures up to 40 PSI, which suits mountain and gravel running pressures well.... Read More