How to Set Up Tubeless Tires

Going tubeless means removing the inner tube and letting the tire seal directly against the rim, with a liquid sealant inside that plugs small holes as they happen. It works, it is genuinely worthwhile on gravel, and the first attempt takes most people an entire afternoon.

This guide is the order to do it in, and the specific points where first attempts go wrong. If you have not decided yet, read the comparison first — this is a job, not an upgrade you unwrap.

Step 0: check your wheels and tires are actually tubeless-ready

Park Tool publish a compatibility article because this is where the money gets wasted. Check the manufacturer’s description of your wheels and tires for “tubeless ready”, “TCS”, “TLR” or “TR”. If neither says anything, the honest answer is that this project is not for your current wheels.

Step 1: gather everything before you start

• Tubeless rim tape in the correct width for your rim, unless the wheels came taped from the factory.
• Tubeless valves long enough for your rim depth, with removable cores.
• Sealant and a measuring cup.
• A valve core remover — usually built into the valve cap or included with the valves.
• An air source that moves volume fast: a compressor, a floor pump with a charging chamber, or a CO2 cartridge.
• Soapy water in a spray bottle and rags. It will be messier than you expect.

Step 2: tape the rim

Remove the tire, tube and any old tape, and clean the rim bed with a rag — tape does not stick to a greasy rim.

Start the tape opposite the valve hole and wrap under tension, keeping it centered, so it sits flat with no bubbles and covers the spoke holes completely. Go around once and overlap the start by a few inches. Then pierce a small hole at the valve.

Tape is the number one cause of a tubeless setup that holds air for an hour and then does not. If in doubt, do it again properly.

Step 3: valve in, tire on, sealant in

1. Fit the valve through the taped hole and tighten the lock ring firmly by hand. Not with pliers.
2. Fit one bead of the tire completely, and the second bead most of the way, checking any rotation arrow on the sidewall.
3. Add sealant. Park Tool describe two methods: pour the measured dose into the tire through the gap before closing the last section of bead, or seat the tire first, remove the valve core, and inject the sealant through the valve. The second is cleaner and it is the one to use once you own an injector.
4. Close the last of the bead with your thumbs, working from opposite the valve toward it.

Step 4: seat the bead

This is the loud part. Take the valve core out so air enters unrestricted, spray soapy water around both beads, and hit it with the compressor or charger pump. You are listening for two sharp pops as each bead snaps into the rim lock.

Once it is seated, screw the core back in, inflate to your riding pressure, and rotate the wheel to spread the sealant around the inside. Leave it overnight, then check the pressure in the morning.

When it will not seat

Every one of these is normal and none of them mean the setup is wrong:

• Air escapes as fast as it goes in. Remove the valve core if you have not, and add more soapy water. Surface tension genuinely helps the bead slide.
• The tire is still folded from the box. Fit a tube, inflate it, leave it overnight, then remove the tube. The casing takes its round shape back.
• A hand pump will not do it. Often true, and not a fault in your technique — the volume of air per stroke is simply too low. Park Tool list a compressor as recommended equipment for this job.
• It seats and then goes soft overnight. Usually the tape. Sometimes sealant needs a couple of rides to find the pinholes in a new tire.

Living with it

Tubeless is not fit-and-forget. Three habits keep it working:

• Check pressure before every ride. Tubeless tires lose air faster than tubes do, and low pressure is what burps a tire off the rim in a corner.
• Top up the sealant every few months. Dried sealant seals nothing. WTB publish a low-temperature limit of 15°F for their sealant, which is a useful reminder that this is a chemical product with conditions, not a permanent fix.
• Still carry a tube. A gash too big to seal is fitted with a tube at the roadside, exactly as before — and the flat repair is the same job, with more mess.

And once it is set up, the reason you did it is pressure: tubeless lets you run lower pressures without pinch flats, and that is where the grip and comfort come from. Work out your numbers rather than guessing.