Crankbrothers M19
Top PickWhat We Like
- 19 tools cover bolts and chains
- Side grips work with gloves
- Compact 89mm body
- Lifetime warranty
Worth Noting
- 175 g is heavy for weight-focused kits
- Tools sit tight when new
- Tools
- 19 functions
- Weight
- 6.17 oz
- Chain Tool
- 8 / 9 / 10 / 11 / 12 speed compatible
- Folded Size
- 3.5 x 2 x 0.5 inches
Read the full review
A chain tool and a broad fastener set in one folding body is what makes the M19 our default. The 19-tool spread includes 2–8mm hex keys, 8 and 10mm open wrenches, spoke wrenches, Phillips and flat drivers, T10 and T26 Torx, and a chain tool rated for 8 / 9 / 10 / 11 / 12 speed chains. That is more than most roadside adjustments need, but it means you are not improvising when a cleat, seatpost, or derailleur comes loose.
What we appreciate is the shape. Side grips give gloved hands something to hold, and the 89mm body still slips into a saddlebag or jersey pocket. The tools pivot from a center drive, so you can fan out the one you need without unpacking a separate bit set. In the hand it feels like a tool rather than a keychain, and the lifetime warranty backs up the build.
The chain tool is the reason we keep coming back. It has the range for modern 11- and 12-speed chains, and the body gives you something to brace against when a stiff link resists. We also like that the tool set is laid out around the pivot rather than buried in a pouch; you can see the bit you need and get to it.
For one tool that stays packed and handles the common failures, this is the pick we trust first. The useful part is not the count but the coverage: bolts, chain, and the small bits that otherwise stay in the workshop.
Bottom line: For one tool that covers both loose bolts and a broken chain, the M19 is our default; its broad tool set and solid chain tool make it the easiest complete kit to leave packed.