Tire liner
A tire liner is a puncture-resistant strip between the tire and tube. Liners are sized by wheel diameter and tire width, so match yours before you buy.
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A tire liner is a strip of tough material that sits inside the tire, between the tire and the inner tube, to help stop thorns and glass from reaching the tube. It is a popular add-on for heavy e-bikes, where a flat on a hub motor wheel takes longer to fix.
What it's used for
Fit liners when you replace a tube or tire, as in E-bike flat tire and Fix a flat on a rear hub motor wheel. If your wheels are set up tubeless, sealant is the usual alternative. See Tubeless tires and sealant.
What to look for
- Wheel diameter and tire width. Mr Tuffy color codes its liners by tire size (Performance Bicycle, Mr Tuffy liners). For example, its XL liners are listed for 26 and 29 inch tires 4.1 to 5.0 inches wide (Performance Bicycle). Read the size on your tire sidewall and pick the range that covers it.
- Fat tires. The Mr Tuffy size for 3.1 to 4.0 inch tires showed as discontinued online at Performance Bicycle when we checked (Performance Bicycle), so 4.0 inch fat e-bike tires may need a liner from another maker or a local shop.
- Pairs. The Mr Tuffy listings we read are sold as pairs (Performance Bicycle).
- Fit it flat and centered. A twisted or shifted liner can rub the tube, so check it when you seat the tire. See Set tire pressure.
Best price we found
- Mr Tuffy XL-Series tire liners, 26/29 x 4.1 to 5.0 inch, pair, at Performance Bicycle: $69.99, checked Nov 9, 2026 (back order)
- Mr Tuffy tire liners, 700c x 20 to 25 mm, pair, at Performance Bicycle: $15.99, checked Nov 9, 2026 (back order)
Prices change often, and a local shop may match them.
Where to buy
- A large bike retailer such as the one above, or the liner maker's dealers.
- A local shop, through find a shop.
Videos
Guides that use it
Sources
- Performance Bicycle, Mr Tuffy liners, performancebike.com
- Performance Bicycle, performancebike.com
- Performance Bicycle, performancebike.com
- Tannus Armour Installation Guide, youtube.com
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