“Do carry a patch kit when I’ve already got a spare tube?” Most riders have asked the question at some point. But carrying both a spare tube and a patch kit is what experienced cyclists do, and for good reason.
One spare tube gives you exactly one fix. A patch kit gives you a safety net when that single fix runs out.
Multiple Flats Are More Common Than You Think
You’re 30 miles from home. You swap in your spare tube and roll on. Ten miles later, you hear that hiss again. No spare. No patches. Just you, your phone, and a long walk.
Experienced riders report getting three, four, even six flats in a single ride. Thorns, glass, and road debris can shred your luck fast. In bad conditions, multiple punctures on one outing happens more often than you’d expect.
Ask any long-distance cyclist and they’ll tell you the same thing. Flats are not rare events. They come in clusters.
A single spare tube gives you exactly one save. A patch kit turns that punctured tube into a backup, giving you multiple extra fixes for a few added grams.
Some Damage Can’t Be Patched
The argument works in reverse, too. A patch kit alone is not enough.
Some tube damage sits beyond repair. Sidewall splits, valve-area tears, seam failures, blowouts, and aged rubber that’s gone brittle all fall into the “unpatchable” category. Slap a patch on a sidewall tear and you’ll be fixing it again in half a mile.
For those failures, you need a fresh tube. No amount of patching will save one that’s torn near the valve stem or split along a seam.
Your spare tube handles the catastrophic damage. Your patch kit handles the simple punctures. They’re complementary tools, not interchangeable ones. That is the real reason experienced riders always carry both.
A Patch Kit Weighs Almost Nothing
A glueless patch kit like Slime Skabs measures 52x38x12mm, smaller than a book of matches. It weighs 10 grams and costs $2 to $5.
A single energy gel weighs more than a patch kit. Your morning coffee cost more. And that tiny kit can fix five or six punctures before you need a replacement.
Compare that to carrying a second spare tube. That’s 80 to 160 grams of extra weight and $5 to $30 depending on the brand. A patch kit delivers the same backup coverage at a fraction of the weight and cost.
Gram for gram, it’s the best insurance you can fit in a saddlebag.
The Smart Repair Cycle
Get a flat on the road? Swap in your fresh spare tube and ride home. That evening, patch the punctured tube at your workbench where conditions are ideal. That patched tube becomes your next spare.
💡 I personally only use a patch tube to get me home. When I get home I swap for a new one. Some people patch a tube several times before replacing, but I know people who have done this and had problems with consistent flats on a long bike ride (always the way!) when they’ve done this….so I don’t recommend it!
A properly vulcanised patch chemically bonds to the rubber and is considered a permanent fix, so you’re not riding on a compromise. You always carry a reliable tube without constantly buying replacements.
This cycle also means you can help a riding buddy who’s stuck. Being the person with a spare patch earns goodwill on every group ride.
Your saddlebag on every ride should hold one spare tube, one patch kit, two tire levers, and a mini pump or CO2 inflator. Total weight is under 250 grams. That’s less than a full water bottle and worth every gram.
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FAQ
Glueless or vulcanizing patches: which should I carry?
Glueless patches apply instantly, work in cold and wet conditions, and have an indefinite shelf life. Vulcanizing patches create a stronger bond, but the glue dries out in heat and storage. Carry glueless on the bike. Keep vulcanizing patches at home for workshop repairs.
Do patches work on TPU tubes?
TPU tubes need specialist patches, and even then the success rate hovers around 50/50. Standard patches won’t bond properly to TPU material. If you ride TPU tubes, always carry a spare. A patch kit is still worth packing, but treat it as a last resort rather than your plan A.
Is a patched tube safe to keep riding on?
A properly applied vulcanising patch is a permanent repair. It chemically bonds to the rubber, and patched tubes can be ridden for thousands of miles without issue. Glueless patches are reliable enough to finish a ride, but apply a vulcanising patch at home for long-term use.
How many patches should I carry?
Most patch kits include five or six patches. Toss the whole kit in your saddlebag. It’s so small and light there’s no reason to leave any behind.
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