Multi-tool and repair kit for your bike: what to always carry

A flat tire or a bolt working loose halfway through a ride are among the most common mishaps on a bike, and almost always fixable on the spot if you're carrying the right tools. The hard part is deciding what to actually bring: too little leaves you stranded, too much just weighs the bike down for problems that in practice almost never happen.

The multi-tool: the heart of the kit

A multi-tool with 2-6mm hex keys covers nearly every adjustment on a modern bike: saddle, stem, bottle cage, disc brakes. Models that also include flat and Phillips screwdriver bits and a T25 Torx key (used on many disc rotors and some saddle bolts) cover the less common cases too. You don't need the most complete tool on the market — more tools just mean more weight and bulk for functions you'll rarely use.

Spare tube, levers and a mini pump

For flats, the classic combination is a correctly sized spare inner tube, two plastic tire levers (never metal ones — they can damage the rim), and either a mini pump or a CO2 inflator. A mini pump never runs out but takes more effort and time; CO2 cartridges are fast but finite, so it's worth carrying more than one if you ride long or far from home. For tubeless setups, a plug kit fixes most small punctures without even removing the wheel.

Quick link and zip ties

A quick link compatible with your drivetrain lets you fix a broken chain in a few minutes — a rare failure, but one that otherwise leaves you with no real alternative. A few plastic zip ties weigh almost nothing and can temporarily fix a loose fender, a rattling mount, or a flapping cable.

Large wrenches, pedal wrenches and drivetrain tools (for the chain or cassette) are better left at home: these are jobs you rarely need roadside, and they add real weight. The same goes for a full cleaning kit — deep maintenance belongs at home, not mid-ride. For regular upkeep, our guide on chain and drivetrain maintenance covers what to check periodically.

Where to keep it all

A small saddle bag is the most common solution and keeps everything within reach without cluttering the bike; for gravel or bikepacking, a top-tube or frame bag spreads the weight better. Either way, it's worth periodically checking that the spare tube in your kit hasn't perished or gone flat on its own, and that the mini pump still works — a check many riders forget to do for years.

Recommended products

A few starting points: a bike multi-tool, a portable mini pump, a tubeless plug kit, and a saddle bag to carry it all without clutter.

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