Tooltorial: How to Fix a Tubeless Flat on the Trail

You hear it before you feel it. That hiss, then the spray of sealant pinwheeling off your tire through the rock garden. Stan's on your shoes, your fork, your face. The tire is going soft and the truck is twenty minutes of fire road behind you. This is the moment that separates the riders who finish the loop from the ones who walk it out.

A tubeless flat is not a big deal if you carry a plug and know the move. Here is how to seal it and keep riding, without taking the wheel off or touching a tube.

Stop and find the hole

Get off the trail and spin the wheel slowly. The leak shows itself, a bubbling spot, a hiss, a fresh line of wet sealant. Once you find it, rotate the tire so the hole sits at the bottom. Sometimes that alone lets the sealant pool and seal a small puncture. Give it ten seconds before you reach for the plug.

Plug it

If the sealant cannot keep up, the hole is too big to close on its own. That is what the plug is for. The Wheelie Wrench™ X Dynaplug® carries a tubeless plugger right in the tool, so you are not digging through a pack for a separate kit. Load a plug, push the insertion tip straight into the hole until most of the plug is buried, then pull the tool back out in one motion. The plug stays. The Dynaplug tips seat clean and hold under pressure, which is the part that matters when you are still ten miles out.

Do not trim it

Leave the tail of the plug sticking out. It looks wrong. It is right. The plug wears flush against the trail in a few minutes of riding, and trimming it short only risks pulling it loose. Sealant gathers around the plug and finishes the seal for you.

Air it back up

Plugging the hole does nothing if the tire is flat. Re-inflate to your trail pressure, somewhere around 22 to 28 PSI up front and 25 to 30 in the rear for most trail and enduro setups, with heavier riders and rocky terrain at the top of that range. A CO2 cartridge gets you going fast. A digital pump like the Eflator™ Mini gets you to the actual pressure you want instead of a guess.

Spin, check, ride

Spin the wheel one more time and watch the plug. A little weep of sealant is normal and will close. A steady leak means the plug did not seat, so add a second plug right next to the first. Two plugs hold what one cannot. Once it is holding pressure, you are back on it.

When a plug is not enough

Some tears are too big to plug, a sidewall slice, a blown bead. That is when a tire boot and a tube earn their keep. Carry one. It is the difference between a long fix and a long walk. But nine times out of ten on the trail, a plug and thirty seconds is the whole story.

The verdict

Tubeless is the best thing to happen to traction in a decade, right up until it sprays sealant across a rock garden and you have nothing to fix it with. A plugger on the tool and a pump in the pack turn a flat from a ride ender into a thirty second stop. Carry it on the bike, not in the truck.

Now go ride.