bicycle pedal wrench size Unior Pedal Wrench

bicycle pedal wrench size Unior Pedal WrenchThe thin wrench for when the modern wrench will not fit Modern carbon cranks pull the spider closer to the pedal spindle face every generation. Some current road cranks leave less than 5 mm of clearance between the back of the wrench flats and the inboard edge of the crank arm. A chunky pedal wrench will not seat against the flats squarely in that space; it catches the crank arm and engages the flats at an angle, where it rounds them under the first

The thin wrench for when the modern wrench will not fit

Modern carbon cranks pull the spider closer to the pedal-spindle face every generation. Some current road cranks leave less than 5 mm of clearance between the back of the wrench flats and the inboard edge of the crank arm. A chunky pedal wrench will not seat against the flats squarely in that space; it catches the crank arm and engages the flats at an angle, where it rounds them under the first hard pull.

The 1610/2 is 5 mm thick. The drop-forged body fits where the chunkier wrenches will not, and it does so without giving up the leverage of a 340 mm handle. This is the wrench shop mechanics keep on the bench specifically for carbon road bikes that show up with the previous wrench's tooth marks already on the flats.

What “low profile” buys you

Two outcomes that make the thin profile load-bearing:

• Square contact across the full face of the flats. A wrench that seats flush distributes the load across both wrench flats instead of concentrating it on the outer corners. Even at the install-removal extreme of 60–80 Nm, the flats stay sharp.
• Access on cranks where the standard wrench gives up. Some premium road cranks need a wrench thinner than the standard pedal-wrench profile to engage the flats at all. The 1610/2 is the answer when the standard pedal wrench bottoms out against the crank before reaching the flats.

The 5 mm thickness comes with a tradeoff: the wrench is one-piece steel without a rubberized handle. People who have been in the bike game for a while tend to prefer this. The drop-forged body transmits full hand force into the pedal instead of absorbing it through grip foam.

Compatibility

The 1610/2 fits any pedal with 15 mm wrench flats, including the tight-clearance carbon road cranks the chunkier wrenches will not reach. For pedals with hex-only engagement, see the Speed Pedal Wrench 6mm or 8mm.

Specs

• Length: 340 mm
• Thickness: 5 mm
• Opening size: 15 mm × 2 (one each end)
• Material: Drop-forged steel, heat-treated through the body
• Finish: Trivalent chrome plated per ISO 1456:2009
• SKU: 1610/2

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 drop-forging is what makes the 5 mm body strong enough to carry 80 Nm of break-loose torque without flexing. A stamped wrench at 5 mm would bend at the openings; the forged grain orientation runs along the lever arm, which is why this wrench fits where a thicker stamped one would have to.

Pro tip from our mechanics

The 1610/2 is what we reach for on bikes with carbon cranks. Before forcing the wrench against the flats, check that it seats flush across both faces; if it sits at an angle, the wrench is engaging on a corner of the flats and will round them on the first pull. Our pedal guide covers when to use the low-profile wrench and when to reach for the longer-handle Pro version: How to install and remove bike pedals →