Home mechanics who want a quick, comfortable tool for everyday adjustments.
Most of the bolts on a modern bike are 4, 5 or 6 mm, and this PRO Y-Wrench puts all three on one tool. Saddle rails, stems, seatpost clamps, bottle cages and many brake and shifter clamps are covered without digging through a set of loose keys.
The Y shape is quicker to use than an L-key. Spin bolts in fast with the tool held by its centre, then use one arm as a handle for extra leverage when snugging them up. The grippy rubber handle keeps it secure in greasy hands.
It's a staple on workshop benches and home toolboards alike, and a good first tool for anyone starting to look after their own bike.
4, 5 and 6 mm
The three most common hex sizes on a bike.
Fast to spin
The Y shape runs bolts in quickly.
Grippy handle
Rubberised centre for a secure hold.
Workshop staple
Handy for setup, fitting and quick fixes.
Tool
Great for
Maybe not for
Hex sizes: 4, 5 and 6 mm. For 2, 2.5 and 3 mm bolts, PRO makes a smaller Y-wrench.
Seat the key fully
Push the hex all the way into the bolt head before turning. Most rounded bolts come from a key that was only half in. On carbon stems and seatposts, finish with a torque wrench set to the number printed on the part.
Shimano's components and accessories brand.
PRO is part of Shimano and makes cockpit components, accessories and workshop tools that sit alongside Shimano's drivetrains and brakes.
