Duro Butyl Inner Tube - 29 x 2.25-2.5 - Presta 40 mm

Reliable, ready and built to match your 29-inch mountain bike tyres, the Duro Inner Tube delivers solid performance when you want to stay riding, not repairing.

Key features:

• Fits tyre widths from 2.25″ to 2.50″ (29″ wheel size) — ideal for trail, all-mountain and 29er setups.

• Equipped with a 40 mm Presta (French) valve, suited for most modern rims and making inflation straightforward.

• Durable butyl rubber construction gives you trustworthy air retention and dependable performance in routine and rugged use.

• Budget-friendly spare or replacement tube — the kind you stash in your bag with confidence.

Why you’ll appreciate it:
Whether you’re mid-ride and hit a thorn, a snag or just need a reliable fallback, this tube gives you the simplicity of replacement without compromise. Its wide width compatibility means fewer mis-match worries, and the Presta valve length suits many rims without needing extensions.

Ideal for:

• 29-inch mountain bikes using tyres between 2.25″–2.50″ width.

• Riders who prefer the simplicity and speed of tube replacement over more complex systems in remote settings or when every minute counts.

• Maintaining a practical spare for training, commuting or trail days — because flats happen and being prepared counts.

What it means for your ride:
With this Duro tube in your kit or on your wheel, you’re more prepared for the unexpected. When a puncture occurs, you swap in the new tube, inflate, spin and ride on — less downtime, less stress, more kilometres. A small detail, but one that keeps your bike moving.

Pro tip for installation:
Before mounting, inflate the tube slightly (≈ 30–40 % of target pressure) so it takes shape. Inspect the tyre and rim for sharp objects or burrs that caused the flat originally. Fit the tube, align the valve straight in the rim hole, then inflate to your recommended pressure for your tyre width and terrain type. Carry a spare tube, pump or CO₂ inflator and a lever—flat readiness starts with the right tube.