Heidenau Inner Tube 9 C – 33G/90° Valve

Heidenau 9 C fits the 2½, 2¾, 2.50, 2.75 size range for 9-inch rims — a compact size for mopeds and light scooters.

The wall here is thinner than in the Cross class — 1.5–2.0mm: enough for light machines like this.

Material and durability

Heidenau 9 C is made from natural rubber: the material resists mechanical stress better than synthetic compounds and retains high elasticity even after prolonged use. The trade-off: it loses pressure slightly faster than synthetic rubber, so check pressure with a gauge from time to time.

Valve and fitment

Heidenau 9 C comes with an angled 33G/90° valve — useful when a straight stem would foul the frame or fender.

Application

Heidenau 9 C suits mopeds and small scooters with a 9-inch rim. Natural rubber retains elasticity better at low temperatures in Kazakhstan's winter, but ages faster than some synthetic materials during prolonged use in summer heat.

Fitting recommendation

When fitting Heidenau 9 C, use a new rim tape of the correct size. Pinching the tube with tyre levers remains one of the most common causes of premature tube failure.