Park Tool  MTC-40 Composite Tool

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A high-quality, folding, take-along bike tool, the Park Tool MTC-40 Composite tool features essential tools—and a disc brake rotor straightener—needed for on-the-ride adjustment or emergency repair.


  • Features a selection of hex and star driver wrenches for most bolts and fittings found on a bicycle, as well as a universal screwdriver for derailleur adjustment
  • Also features a chain breaker tool for emergency chain repair and replacement, with an integrated disc brake rotor straightener and bottle opener
  • Detachable CO2 cartridge inflator adapter is used in conjunction with disposable CO2 cartridges to assist in reinflating flat tires
  • Inflator adapter is compatible with most bicycle tubes with a Presta valve
  • Tool includes 2.5, 3, 4, 5, 6 and 8 mm hex wrenches; T25 and T30 Torx®-compatible drivers; and combo cross/straight tip screwdriver
  • Also comes with 5- to 12-speed compatible chain tool with integrated disc brake rotor straightener and bottle opener, CO2 cartridge inflator adapter, and keyring holder
  • Built with a superstrong composite multiposition handle and hardened and plated tools to withstand years of use
  • Compact size makes it perfect for a saddlebag or backpack
  • Note: The MTC-40 chain tool will not peen Campagnolo 11-speed chain rivets (see the Park Tool CT-4.3 or CT-6.3, not included)
  • The pin of the chain tool is replaceable—Park Tool part #985-1 (not included)


View all Park Tool Bike Multi-Tools

Technical Specs

Item #225319
Best Use



Composite/steel alloy


3.2 x 2 x 0.9 inches


217 grams

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