The ranking on this page is not a quality ranking. It is a consequence ranking: what happens if you do not have it. A spare tube is first because without one, a puncture ten miles out is a walk. A saddle bag is last because it fixes nothing — it just means you never forget the rest. Six objects that do six different jobs cannot be ranked any other way without inventing a rubric.
We have not tested any of it. What we can do is tell you which numbers to check before you buy, because three of these six items can be bought in the wrong size, and a spare tube that does not fit your wheel is worse than no spare tube at all — it is dead weight that felt like insurance.
The five-minute version
Tube, levers, something that makes air, a multitool, patches, a bag. That is the whole list, and it has not changed in thirty years. Everything else — a rain shell, food, a spare quick link, cash, a phone — is personal. These six are structural.
The three sizes you have to get right
Tube width. Read your current tire’s sidewall: it says something like 700x28. The tube must cover that width. Park Tool is blunt about what happens either side of the range — a tube too narrow for the tire becomes thin when inflated and punctures more easily, while one too wide will not fit inside the casing and can blow out.
Valve type. The slim valve with a small nut on top is Presta; the fat one like a car tire is Schrader. They are not interchangeable and your pump head has to match too. Our Presta vs Schrader guide covers the whole thing, including what to do if the rim hole is the wrong size.
Valve length. The Continental above publishes a 42 mm stem. On a deep aerodynamic rim that will not protrude far enough to attach a pump, and you need 60 mm or 80 mm instead. Measure by looking at the tube already in your wheel.
CO2 or a pump?
Cartridges are fast and finite. A hand pump is slow and infinite. The honest split: if your rides are close to home or in a group, a cartridge inflator is the better experience virtually every time. If you ride alone, long, or somewhere without phone signal, carry a pump — Lezyne publishes a 120 psi rating and Presta and Schrader compatibility for its hand pump, and a pump that cannot run out is worth the extra weight.
A note nobody mentions: CO2 permeates through a butyl tube far faster than air does. A tire inflated with a cartridge will be noticeably soft the next day. That is not a failure, it is chemistry — top it up with a floor pump when you get home. Our floor pump vs mini pump comparison sets out where each one belongs.
What we deliberately left off
A lock, unless you are stopping. A good lock is heavy enough to change how a ride feels, and our lock roundup explains why the light ones are not worth carrying. A chain tool as a separate item — the multitool above has one. Tubeless plugs, because they only apply if you run tubeless, in which case our tubeless flat guide is the page you want and the kit is different. And a spare tire, which is a bikepacking decision rather than a day-ride one.
Practise the repair once, at home
The most common reason a rider with a full saddle bag still ends up walking is that they have never taken a tire off. Park Tool publishes the full procedure for tire and tube removal and installation, and our own how to fix a flat walks through it in the order you will actually meet the steps. Do it once on the kitchen floor with good light and clean hands. It takes fifteen minutes and it is the highest-value fifteen minutes in this entire article.
Restock the day you use it
The failure that catches experienced riders is not forgetting the kit. It is riding home on the spare, hanging the bike up, and setting out three weeks later with an empty bag and a used cartridge. That is why the tube above is a two-pack, and why the patch kit is on the list at all.
