Heidenau Inner Tube 12 D – 33G/90° SV Valve

Heidenau 12 D fits the 3.00/3.50 size range for 12-inch rims — a narrow, precisely-matched range for mopeds and light scooters.

The wall here is thinner than in the Cross class — 1.5–2.0mm: enough for everyday road riding.

Material and durability

Heidenau 12 D is made from natural rubber: the material resists mechanical stress better than synthetic compounds and holds elasticity for longer. 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 12 D comes with an angled, long-stem 33G/90° SV valve — the 90° bend routes the valve away from a brake disc or chain guard, and the longer stem reaches through a wider rim.

Application

Heidenau 12 D suits motorcycles, scooters and mopeds with a 12-inch rim under normal road conditions. 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 12 D, 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.