On-bike multi-tool
Every loose bolt, dropped chain, or roadside saddle adjustment turns into a long walk home without one. Live on the bike.
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A good multi-tool fits 95% of your bike's fasteners (M4/5/6 hex, T25 Torx, Phillips, flat) and includes a chain breaker and a couple of spoke wrench sizes. Look for hardened steel bits — soft bits round out hex heads, which is worse than no tool at all.
Carry it where you'll always have it: saddle bag, hip pack, or jersey pocket. Plus a tube, tire levers, and CO2 (or a mini pump). Without all three you're not actually self-rescuing.
Where to buy
Picks with a "Check today's price" button are affiliate links to the brand's store or Amazon. An editorial mention's link to the maker's own page is a plain link; where a mention also carries a "Check today's price on Amazon" link, that one is an affiliate link. Nobody pays to be mentioned either way.
Our picks
Also worth a look
Wolf Tooth EnCase System
Lives inside your bar ends — invisible, weightless, all the tools you actually need.
See the full specs
Pro tips from the e-bike pros
- Buy one with a 4mm hex bit. Half your bike's bolts are 4mm and most cheap tools skip it.
- Carry it with your patch kit, tube, levers, and CO2 inflator. A tool alone doesn't fix a flat.
- Check the bits annually. Heat, sweat, and road grit eat the cheaper coatings.
Some links are affiliate links. See our disclosure.