8-piece Short Torx Wrench Set

Torx fasteners are a fixture of modern bikes. Disc-rotor bolts moved to Torx because the six-pointed star recess uses more of the available bolt-head material than hex does, which matters most on small fasteners (M5 rotor bolts at 4–6 Nm) where the bolt head doesn't have material to spare. A complete bike-shop Torx wrench set covers T10 through T40; the size range where bicycling Torx fasteners actually live.

This 8-piece set ships in a plastic clip-index, sized for fast deployment without rooting through a tool bag.

What's in the set

Eight Torx wrenches:

• T9
• T10
• T15
• T20
• T25
• T27
• T30
• T40

T25 is the workhorse for rotor bolts; it'll see the most cycles in any shop that services disc brakes. T30 shows up on some crank-arm bolts (especially Shimano Hollowtech II generations). T40 covers larger fasteners and some BB lockring work. The T9, T10, T15, T20, T27 sizes fill out the rest of the cycling Torx range; small accessory fasteners, brake-lever clamps, shifter mounts.

Why dedicated Torx wrenches matter

A Torx wrench is not interchangeable with a hex wrench of the same outer diameter; the recess geometry is fundamentally different. A hex wrench in a Torx recess will round the recess on the first cycle. A Torx wrench in a hex recess will round the wrench tip on the first cycle.

Torx geometry is tightly specified: the precise distance from corner-to-corner across the six-point star, the depth of the engagement surface, the radius at the corners. Wrenches that hold that geometry fit; wrenches that drift off-spec strip the recess. Unior's safety cut backs this up by spreading force across the recess surface, away from the fastener's outer edges.

When to step up to TX Plus

A TX Plus profile is an enhanced Torx with additional engagement geometry inside the standard Torx recess. For high-torque applications (crank-arm bolts at 50+ Nm), the TX Plus 1/2-drive socket is the better tool; additional grip area means less chance of cam-out at the top of the torque range. For routine rotor-bolt work at 4–6 Nm, standard Torx is fine.

Specs

• Sizes: T9, T10, T15, T20, T25, T27, T30, T40
• Handle style: short-arm L-shape
• Storage: plastic clip-index
• Set weight: 130 g on the clip
• Construction: premium chrome-vanadium steel with greater density at the highest-pressure points

Made in Slovenia, since 1919

Unior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. Torx geometry is unforgiving of manufacturing drift: a tip that's a few hundredths off across the corner-to-corner dimension will either round the wrench or round the bolt recess. Our manufacturing process holds the dimensional tolerance through the full production run; the tip-shape consistency is what keeps the wrench in service for years.

Pro tip from our mechanics

Replace your T25 wrench at the first sign of tip wear. A worn T25 will round every rotor bolt it touches, and the bolt loses faster than the wrench does. For the framework on which wrench style fits which job: Hex and Torx wrenches for bike work →.

FAQ

Which Torx sizes are in this set? Eight L-shaped wrenches: T9, T10, T15, T20, T25, T27, T30, and T40, each in a size-labeled slot on the clip. T25 covers six-bolt rotor bolts, T30 turns up on some crank and chainring hardware, and the small sizes handle brake-lever clamps, shifter mounts, and accessory screws. The loaded clip weighs 130 g.

Does the set include a T8 wrench? No, T9 is the smallest size here. On bicycles T8 is rare, appearing mostly on tiny electronic-shifting and accessory screws; the fasteners you meet in routine service, from brake-lever clamps up to rotor and crank bolts, sit inside the T9 to T40 band this set covers.

Are these tamper-resistant (security) Torx wrenches? No. These have the standard TX profile without a center bore. Tamper-resistant TR fasteners carry a pin in the middle of the recess and need a drilled tip, which Unior builds as a separate 9-piece set, sold here as the Set of Wrenches with TX Profile and Hole in Plastic Clip.

What is Unior's catalogue number for this set? Unior catalogues this set as article 220/7TXNPH, code 617077, EAN 3838909170770. Each wrench inside is article 220/7TXN in its own size. If you cross-shop against European listings, 220/7TXNPH is the number to search for.