It makes sense to carry a spare inner tube every ride beyond the corner shop. That way, if you suffer a puncture, simply remove the sharp from the tyre, swap the tube and you're back on the road or trail. Then take the punctured tube home to patch at you leisure and use as a spare. We stock tubes in every common size from 12 inch to 29 inch. Choose between Presta and Schrader (car type) valve.