Ibex Combination Wrench

The 12mm fastener shows up on a working bike more than most mechanics expect: rear axle nuts on track bikes and singlespeeds, certain stem clamp bolts on older builds, pivot bolts on some suspension linkages, and the cone-side of standard cup-and-cone hub axles. We added the 12mm Ibex Combination Wrench to the IBEX set because customers kept asking for it, and because every shop kit eventually finds the size missing.

The defining feature of the Ibex line is the open-end side. Most open-end wrenches slip off when you reverse the swing; the Ibex profile catches on the flats during the back-swing and resets, so the wrench works like a ratchet in tight quarters. That matters when you're working a fastener half-buried behind a frame tube or a derailleur cage, where you can't get a full handle rotation but you can rock the wrench back and forth.

The box-end side has a 15° angle and uses Unior's LIFE profile. The LIFE profile loads the fastener on its flats rather than on its corners. Corners are where rounding starts; the flats are flat for a reason. A LIFE-profile box-end on a 12mm nut that's seen ten removals still drives the nut without slop.

Specs

• 12 mm across-flats, both ends
• Open-end side: IBEX ratchet profile
• Box-end side: 15° offset, LIFE corner-protection profile
• Hardened chrome-vanadium steel, chrome plated
• Article number: 129/1

Built in Zreče, Slovenia

Unior has been forging hand tools in Zreče since 1919, and is the official technical partner of multiple World Tour and downhill teams. The Ibex profile and the LIFE corner-protection geometry are Unior's own designs, not industry-standard wrench geometries. The same wrench bodies are forged at Zreče from chrome-vanadium blanks, then heat-treated and chrome plated through the same process that goes into the rest of the IBEX line.

Pro tip from our mechanics

A combination wrench earns its bench-drawer slot the day a socket can't reach the fastener. Our workshop hand tools guide covers when to reach for a combination wrench versus a socket-on-ratchet, the role of the IBEX profile in tight quarters, and the rest of the hand-tool layer behind the bike-specific kit: Workshop hand tools every bike shop needs →