When to Replace Bike Tires and Check Tubeless Sealant
A comprehensive guide on when to refill tubeless sealant and when to finally replace your worn bike tires.
Before you start
Tires are a safety item. Replace them when casing damage, deep cuts, exposed threads, bulges, or a worn tread make a puncture or loss of grip likely.
Do not ride a tire with exposed casing, a bulge, or a cut that opens under pressure. Fit the tire’s rotation direction and stay within the wheel and tire pressure limits.
What you'll need
Plastic levers help protect rims and tire beads.
View on AmazonUse an accurate pressure appropriate for the tire and rider.
View on AmazonMatch wheel diameter, tire width clearance, and tubeless compatibility.
Carry a plug kit for trail- or roadside punctures that sealant cannot close.
View on AmazonFor cleaning and finding a tubeless bead leak.
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Recommended interval
Mileage and time are useful reminders, but inspect sooner after wet, dusty, or especially hard riding.
Step-by-step instructions
- 1
Inspect before removing the tire
Spin the wheel and check both tread and sidewalls. Mark any cut, bulge, or puncture, then inspect the rim tape and valve once the tire is off. Replace the tire if threads show, the carcass is damaged, or tread is too worn for your riding conditions.
- 2
Confirm the replacement fits
Match the tire’s diameter to the rim, verify width clearance at the frame and fork, and check that it is compatible with your rim and intended pressure. For tubeless, use a tubeless-ready tire, rim, tape, and valve.
- 3
Remove the old tire and inspect the rim
Fully deflate, push both beads into the center channel, then use levers only as needed. Remove thorns and debris from the old tire and inspect the rim tape for holes, wrinkles, or lifted edges.
- 4
Mount one bead and add the tube or sealant
Install one bead by hand. For a tube, add just enough air to give it shape, place it evenly inside, and avoid trapping it under the bead. For tubeless, seat the tire according to the tire and rim maker’s instructions, then add the correct sealant amount.
- 5
Seat, inflate, and inspect
Work the final bead over by hand where possible, check both sides for pinched tube or lifted tape, and inflate gradually. Confirm the bead line is even around the whole rim, set riding pressure, and re-check after a short ride.
When to use a professional
Stop the DIY work and book a qualified mechanic if any of these apply.
- The bead will not seat or pressure drops quickly.
- Rim tape, sidewall damage, or a tubeless valve needs replacement.
- You are fitting an unusually tight tire or are unsure whether the tire is safe to repair.
Find a qualified local bike shop
This service benefits from the right tools, torque specifications, and an experienced inspection. Search nearby shops that can help with tubeless tire installation and tire safety inspection.
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