I have just come into posession of a multitool with a 2mm Allen key. I’m trying to think of anywhere on a bike it might be used. Am I forgetting something obvious?

Some reach adjustable stis are 2mm.

KS Lev cable set screw.

Wee grub screws on some fork adjusters, and the tiny, stupidly-easy-to-roud adjuster screws on 11s XTR mechs

Sounds like fairly limited appeal then!

Lock-ons? Or are they 2.5mm?

Some brake travel adjusters

K-edge Garmin mount is a 2mm i think

digging pebbles out of your cleats 😀

Cinch crank fitting requires one.

bluearsedfly – Member
Lock-ons? Or are they 2.5mm?

2.5 or 3, usually. I came across a Nuke Proof set once that used 3 on one end and 2.5 on the other. Incredibly irritating things to fit/remove, those.

shanking ants!?

SRAM chain catcher?

Old skool V-Brake centring screws were 2mm

Road cartridge pad grub screws. Dropper post and shock lock out cable grub screws.

thekettle – Member
Cinch crank fitting requires one.

2.5 I think

Pretty sure i`ve had to use a 2mm out on the road for the lockring on a Sram Red BB30 cranks?

I use mine to clear dirt from under my toe nails…..VERY useful little tool that

The grub screws on a curtain pole…. in my house anyway…

grip-shift grub screw…

More to the point, why hasn’t my multitool got a T30 on it? I need that for mech hanger and chain ring bolts as well as some pivot bolts.

Its for an M4 grub screw 😕

Lots of people who don’t know the difference between 2 and 2.5mm! (25%)

Shoving in the hole to release the little pin that opens the hinge on Shimano brake lever bar clamps so you can actually get them off your bars without removing your grips because you rounded out the 2.5mm lockring bolt trying to use a 2mm allen key 😉
(Speaks from experience)

not sure if its been mentioned, but I guarantee that if a 2mm wasn’t on the multi tool,you’d end up stuck in the middle of nowhere, in desperate need of a 2mm. But because its there, you’ll never need it. 🙂

Tension adjustment on shimano clutch mechs 🙂

On most road bike brakes there is a 2mm adjuster to tension a spring to centre the caliper

Hydraulic brake lever reach adjustment on mountain bikes?

I think one of the Di2 front mech adjustment uses 2mm. And Tri Rig brake adjustment too.

Throw the 2mm key away, then go for a long ride, in the wilderness, during bad weather, then you’ll probably find the thing on your bike that needs it.

Digging mud out of bolts before you use the 4mm or 5mm.

Rear mech hanger on mine uses a silly small allen key … could be 2mm. Anyway the correct one is buried in my seat pack.

Pad retaining bolt on some Magura brakes.

2.0mm is one of the sizes you need for adjusting mechanical Shimano disc brakes (2mm on one pad and 3mm on the other – go figure)

Lev is about the only other thing I’ve ever used one for.

Upside- a 2mm allen key isn’t going to upset anyone but the most gramme conscious weenie out there… 🙂

Ah, but it’s at the expense of a 2.5mm.

Lockout cap on xfusion RL2 forks uses a small 2mm allen grub screw if I recall?