Heidenau Inner Tube 10/11 F – 33G/90° SV Valve

Heidenau 10/11F fits the 4.00, 110/90, 120/90, 130/90, 110/70, 120/70, 130/70 size range for 10-inch rims — the same range as the other two 10/11F variants, but with an angled, long valve.

The wall here is thinner than in the Cross class — 1.5–2.0mm: enough for a scooter.

Material and durability

Heidenau 10/11F 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 10/11F comes with an angled, long-stem 33G/90° SV valve — it solves two things at once: the 90° bend routes the valve away from a brake disc or fairing, and the longer stem reaches through a wider rim.

Application

Heidenau 10/11F suits scooters with a 10-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 10/11F, check the bend angle and length of the original valve and 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.