Inner tube 12x2.125 valve 45°x45°

Size

12x2.125 inner tube. This size is found on electric balance bikes, children's bikes and some compact vehicles. It accepts a range of widths around 2.125 inches, as the rubber adapts to the tyre.

45x45° valve

The valve is angled at 45 degrees on both segments. This angle is dictated by the rim and mudguard geometry: it gives access to the valve with an inflator head where a straight valve would be unreachable.

A 45x45° valve does not replace a straight valve, nor a 0x90°. Check the angle of the original tube before ordering — this is the leading cause of error on this product family.

Fitting

Sold individually. Inflate the tube slightly before inserting it into the tyre to avoid folds, and make sure it is not pinched between the bead and the rim before bringing it up to pressure.