Heidenau K 37 3.50-18 Winter Enduro Rear Motorcycle Tyre

The Heidenau K 37 3.50-18 is a German-made rear enduro motorcycle tyre built for an 18-inch rim. It fits enduro and classic motorcycles that run an 18-inch rear wheel. Furthermore, it is designed for mixed winter surfaces, from wet slush to packed snow. The tread pattern carries large, open blocks that bite into loose ground.

This size uses the classic imperial marking. The figure 3.50 states the section width in inches. The number 18 states the rim diameter in inches. Therefore, your motorcycle needs a matching 18-inch rear rim before fitting. The casing is a diagonal (bias-ply) construction with a TT carcass.

Load index is 62 and the speed index is P. Weight is 5.48 kg. Because this is a TT tyre, an inner tube is mandatory during fitting. Tubeless mounting is not supported. The tyre is sold as a single rear tyre rather than a set, since the front axle normally takes a different size.

Key Benefits

• Large K 37 tread blocks – open blocks grip snow and gravel roads, so traction stays predictable.
• Diagonal bias-ply casing – the carcass absorbs impacts from potholes and stones.
• Load index 62 – corresponds to a 265 kg rating under motorcycle tyre classification.
• Speed index P – places the tyre in the 150 km/h class.
• TT carcass with an inner tube – a simple, dependable solution for the cold season.
• Made in Germany – country of manufacture is DE, so wear resistance stays consistent.
• Known weight of 5.48 kg – an exact mass figure helps when balancing the rear wheel.
• M/C marking – the tyre is intended for motorcycles, not other vehicle categories.

Who Is This Tyre For?

This tyre suits enduro and classic motorcycles fitted with an 18-inch rear rim. Above all, it serves riders who use their machine daily through the cold season. The 3.50-18 size mounts on the rear axle only.

In addition, it handles mixed surfaces well. Slush, packed snow and gravel roads are its natural territory. Many riders also run it through the transition seasons, in spring and autumn.

However, the tyre shows its strengths on winter surfaces where an open tread pattern matters. It is not intended for purely sport riding on asphalt. Before ordering, confirm that your rear rim measures 18 inches and that you have a correctly sized inner tube.

Technical Specifications

Why Choose the Heidenau K 37 3.50-18?

Heidenau is a German tyre manufacturer based in Saxony, specialising in motorcycle tyres. The K 37 pattern belongs to their enduro and classic motorcycle family. Moreover, this maker is one of the few that still produces classic imperial sizes such as 3.50-18.

The K 37 tread is coarser than road tyre patterns. As a result, it holds better on soft and slippery ground. The diagonal casing also resists impacts more effectively than thinner road-oriented constructions.

German production keeps the rubber compound consistent in its wear resistance. Additionally, the exact tyre weight of 5.48 kg is published. That figure makes rear wheel balancing easier once the tyre is mounted.

Frequently Asked Questions

Can the Heidenau K 37 3.50-18 be used tubeless?

• No, this is a TT (TubeType) tyre.
• An inner tube is mandatory during fitting.
• Tubeless operation is not supported.

Which motorcycles does this tyre fit?

• Enduro and classic motorcycles with an 18-inch rear rim.
• The 3.50-18 size mounts on the rear axle.
• The M/C marking confirms motorcycle use.

Is this a front or rear tyre?

• It is a rear tyre.
• The front axle on enduro motorcycles normally takes a different size.
• It is sold individually, not as a set.

What does the size 3.50-18 mean?

• 3.50 is the section width in inches.
• 18 is the rim diameter in inches.
• This is the classic imperial marking format.

What load and speed ratings does it carry?

• Load index 62, equal to 265 kg.
• Speed index P, equal to the 150 km/h class.
• Both figures follow motorcycle tyre classification.

Is it suitable only for winter riding?

• It is also used through the transition seasons.
• Its strengths appear on winter surfaces needing an open tread.
• It is not built for sport riding on asphalt.

Where is this tyre made?

• Country of manufacture is DE, Germany.
• Heidenau produces in Saxony.
• The brand focuses on motorcycle tyres.

How much does the tyre weigh?

• The weight is 5.48 kg.
• Knowing the exact mass helps with rear wheel balancing.

The Heidenau K 37 3.50-18 combines an open enduro tread with a robust bias-ply casing. It mounts on an 18-inch rear rim with an inner tube. For riders covering slush, packed snow and gravel through the cold months, it is a straightforward and well-documented choice.