29 Inch Mountain Bike Inner Tubes 2 Pack Tough As Nails Heavy Duty Butyl Rubber Replacement Fits 1.75 to 2.3 Inch Tires Presta Valve 48mm Leak Free High Air Retention For MTB Mountain Biking

Heavy-Duty 29er MTB Inner Tubes for 29er wheels (2-pack)
✔️ 2-pack; fits 29x1.75-2.3 in (736.6x44.45-58.42 mm); Presta 48mm

These MTB inner tubes are built with 60% high butyl rubber for superior air retention and durability. The thicker sidewalls (1.1-1.2 mm) resist punctures and maintain shape under temperature changes. They fit 29x1.75-2.3 inch tires and use a 48 mm Presta valve. Each tube is vulcanized for uniform roundness and undergoes 100% quality control. This 2-pack makes replacement quick and easy to store in the included carton. Note: insert into the outer tire before inflating to prevent blowouts.

✅ 60% high butyl rubber for better air retention
✅ Sidewall thickness 1.1-1.2 mm for improved puncture resistance
✅ Fits 29x1.75-2.3 inch tires with 48 mm Presta valve
✅ Includes two inner tubes per pack for easy replacement

💡 What is an inner tube used for on mountain bikes?

In simple terms, it holds air inside the tire to keep it seated on the rim and cushion the ride.

- Keeps air pressure within the tire so you can ride without flats
- Provides a flexible barrier between the tire and rim for a smoother ride
- Works with Presta valves and common MTB wheel sizes
- Choose the correct size and wall thickness for your tire width and riding conditions