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Key Features
























































The Heidenau K37 is a rugged dual sport knobby tire with a traditional block-style tread that delivers stability and control across mixed terrain. Designed for riders of classic Enduros and military motorcycles, it brings a vintage look with modern reliability.
Its progressive knobby profile prevents excessive buildup of mud or snow, helping the tire maintain traction even in challenging conditions. The K37 is available in multiple sizes, including the 4.00-19, which carries a distinctive tread pattern originally engineered for sidecar use. While it was created with sidecars in mind, this tire size can also be mounted in front or rear positions depending on your setup and local regulations.
Heidenau uses a resilient rubber compound to ensure durability and extended tread life, making the K37 a tough knobby that resists breakage and performs consistently over time. Built as a Tube Type (TT) tire and P-rated for speeds up to 93 mph (150 km/h), the K37 combines proven off-road performance with reliable road capability. Made in Germany.
| Tire Position | Front/Rear or Sidecar, Sidecar |
|---|---|
| DOT Compliant | Yes |
| Vehicle | Motorcycle |
| Belt Type | |
| Sidewall | Blackwall |
| 5 star | 80% | |
| 4 star | 20% | |
| 3 star | 0% | |
| 2 star | 0% | |
| 1 star | 0% |
Customer Images

Installed easily and so far has performed above my expectations.
Standard equipment on Ural Gear-Up. Nice blend of on-road and off-road handling. Noise level on road is quite low – especially given the aggressive tread.
a great tire
Use this tire on my Ural.
Great