Tubeless Tyre Setup: Step-by-Step Guide

Why bother with tubeless?

From the Cyclesite marketplace. Roughly two thirds of used gravel bikes listed on Cyclesite in 2026 ship with tubeless-ready wheels and tyres. Of those, a large proportion are sold with the original sealant long dried out, so a fresh setup is almost always part of the first month with the bike. Buyers who plan to ride off tarmac should budget £40-£60 of tape, valves and sealant on top of the bike itself.

Tubeless tyres seal small punctures as you ride. The sealant inside the tyre fills the hole before the air gets out, you carry on, and you only notice the puncture when you find a small white scab on the tread that evening. On a road bike that is the difference between a five minute roadside fix and not stopping at all. On a gravel bike or mountain bike it is the difference between a ride and a walk.

The other reason is pressure. A tubeless tyre runs five to ten psi lower than the same tyre with an inner tube and feels noticeably more comfortable, especially on British roads where the surface ranges from worn out to actively hostile. Lower pressure also means more grip, which matters more than weight or aerodynamics for almost every rider.

What you give up is simplicity. Tubeless setup takes longer the first time, sealant needs topping up every three to four months, and a really bad puncture still needs an inner tube fitted at the roadside the old way. None of that is a reason to avoid tubeless. It is a reason to budget twenty minutes the first time you fit a new tyre and to keep a spare tube in your saddle pack regardless.

Check your kit is actually compatible

This is where most failed setups go wrong. The terms to look for are TLR (Tubeless Ready) on Bontrager and Trek wheels, UST on Mavic and Hutchinson products, and Tubeless Compatible or Tubeless Easy on Schwalbe and Continental tyres. If your rim or tyre does not have one of those markings, you are gambling. Old non-tubeless rims can sometimes be coaxed to seal but the process is unpredictable and not worth the time.

The rim needs an airtight bed, which on most modern wheels means it ships with rim tape already fitted. Lift the tape, look for the spoke holes, and confirm they are covered cleanly. Fitted tape that is bubbled, twisted or torn must come off and be replaced. Stan's NoTubes yellow tape is the standard, but Bontrager, Mavic, DT Swiss and Schwalbe all sell their own equivalent. Buy the width that matches your inner rim width. Too narrow leaves spoke holes exposed and the tyre will never hold pressure.

Valves come in 44, 50 or 60mm depending on rim depth. Aluminium core valves are stronger than brass and worth the extra two pounds. Pop the rubber base into the tape hole, screw the lock ring on the outside, and tighten by hand only. Pliers crack the valve base.

Sealant: pick one and use enough

Stan's NoTubes Original is the default and the cheapest. Muc-Off No Puncture Hassle is thicker and seals larger holes, useful for gravel and mountain bike use. Orange Seal Endurance lasts longer between top-ups but costs more. Avoid the cheap white-label sealants from Wish and Amazon. They dry out within a fortnight and turn into rubber clods inside the tyre that you then have to fish out by hand.

Quantity matters more than brand. Road tyres need 60-80ml per wheel. Gravel tyres in the 38-45mm range need 100-120ml. Mountain bike tyres need 120-150ml. Less than that and the sealant cannot reach a puncture before the tyre goes flat.

Pour it in either through the valve once the tyre is mostly seated, or directly into the tyre before you push the second bead on. The valve method is cleaner. Unscrew the valve core with a small valve-core tool (about £4 from Halfords or any bike shop), inject sealant with the bottle's nozzle or a syringe, then screw the core back in.

The actual fitting steps

Get the wheel, tyre, valves, sealant, a tyre lever, soapy water in a spray bottle, and your air source ready before you start. Air source means a track pump with a tubeless charge chamber (Topeak JoeBlow Booster, £80, the most-used solution in UK home workshops), a Bontrager TLR Flash Charger (£70), or a small compressor if you have one. Without high-volume air the bead will not seat. A normal track pump rarely gets there on the first try.

1. Fit the valve. Through the rim hole, lock ring on the outside, hand-tight only.

1. Fit one side of the tyre. Push the bead into the centre channel of the rim. Work around with your thumbs. The last few inches usually need a tyre lever, but be careful not to nick the bead.

1. Spray the bead with soapy water. Both sides. This helps the bead pop into place when you charge it with air. Do not skip this step.

1. Pour sealant in. Either through the open second side, or fit the second bead first and add sealant through the valve.

1. Fit the second bead. Same technique as the first. Last few inches will be tight. A bead jack (£15) makes this far easier on stiff tyres.

1. Charge with air. Single fast burst from the booster pump. You should hear two distinct pops as each bead snaps into the rim. If you hear nothing, the bead is not seating. Squirt more soapy water and try again.

1. Inflate to the upper end of the recommended range. That is usually 80-100 psi for road, 50-60 psi for gravel, 30-35 psi for mountain. Holding the wheel flat, rotate it to spread sealant around the inside of the tyre.

1. Listen and look. A new tubeless setup hisses for a few minutes as small holes between the tape and rim seal. That is normal. Hissing that lasts longer than fifteen minutes means the bead is not fully seated, the tape is leaking, or the valve is loose.

1. Drop pressure to your riding pressure. Tubeless lets you run lower than you used to. Start at 60-65 psi for a 28mm road tyre, 35-40 psi for a 40mm gravel tyre, 22-25 psi for a 2.4 inch trail tyre. Adjust by feel over the first month.

Troubleshooting bad setups

Bead will not pop. Almost always insufficient air pressure or volume. Borrow a compressor from a friend or take the wheel to your local shop and ask them to charge it. Some will do it for free, some charge a fiver.

Persistent slow leak. Pump the wheel up, leave it for an hour, and look for bubbles where you sprayed soapy water. Leak around the valve means the lock ring needs another quarter turn. Leak through a spoke hole means the rim tape has failed and needs replacing. Leak from the sidewall means a porous tyre, which usually fixes itself once the sealant works through.

Sealant explosion. A bead that fails to hold under high pressure, often on stiff carbon road rims. Drop pressure to 60 psi, ride a couple of miles to spread sealant fully, then build pressure up gradually.

Tyre seats but goes flat overnight. Top-up sealant or check valve core. New tyres sometimes need a second sealant top-up after the first ride.

Maintenance schedule

Top up sealant every three to four months. Open the valve, pull the core, and inject 30-60ml. The wheel does not need to come off. In summer with dry conditions, sealant lasts longer. In winter, with the tyre flexing and sealant getting flung around, three months is the safe maximum.

Every twelve months, peel a tyre off and clean out the dried-up rubber clods. They build up at the bottom of the tyre as it sits between rides. Wipe the inside with a rag, add fresh sealant, refit. This is the job most owners skip, and it is the reason their wheels feel heavier than the spec sheet suggests by year two.

Keep a spare inner tube and a tyre lever in your saddle pack. If sealant fails to seal a bigger cut, fit the tube and ride home. Do not try to repair a tubeless tyre at the roadside with plugs unless you have used them before. They work, but the time pressure of a roadside repair is when most plug fixes go wrong.

When tubeless is the wrong answer

Smooth tarmac at high pressure on narrow road tyres with light bodyweight is the use case where tubeless gives the smallest benefit. If you weigh under 65kg and ride 25mm road tyres at 90 psi exclusively on good roads, the comfort and grip wins of tubeless are marginal. The puncture-protection benefit still applies, but a quality clincher with a fresh inner tube and a Continental Gatorskin or similar will get you through a season with one or two punctures.

Cyclocross and high-pressure track use are also marginal. Most other use cases, especially anything off tarmac in the UK, are better with tubeless.

Quick reference

Pressures assume an 80kg rider. Subtract two psi for every 10kg lighter, add two psi for every 10kg heavier.