Heidenau K80 90/90-18 57H RF TL

K80 is the sports road model in the Heidenau range — built for riders who move quickly on tarmac and change direction often. The defining quality of Heidenau K80 is a high level of grip combined with strong wear resistance, delivered by a modern elastomer compound technology. The 90/90-18 size, with a load index of 57 (230 kg), is officially approved by Heidenau for use on either axle — the only 18-inch size in the range that works equally well at both ends.

Key features

• Grip and service life — the defining quality of K80: the modern elastomer compound delivers a high level of grip and wears slowly at the same time.

• Quick direction changes: the tyre contour is designed for responsive handling — Heidenau K80 comes into its own through linked corners.

• Grip at lean: the shoulder area of the tread is developed separately, so Heidenau K80 maintains grip while leaned over, under both braking and acceleration.

• Predictability near the limit: the responses of Heidenau K80 remain predictable for the rider as grip approaches its limit — which is why the model has established itself in supermoto.

• Line stability: new materials in the layer beneath the tread keep Heidenau K80 on line through fast corners.

• Damping: the tyre construction smooths out small surface irregularities — Heidenau K80 rides more comfortably over broken tarmac than a sports road tyre is usually expected to.

Tread and construction

Heidenau K80 90/90-18 is a bias-ply tyre: the size designation carries neither a B nor an R. It is supplied tubeless (TL), suiting cast wheels and tubeless spoked rims alike — which matters on retro classics. The carcass is reinforced (Reinf.), giving headroom for luggage and a pillion. The H speed index permits use up to 210 km/h.

Application

90/90-18 is the versatile 18-inch size: often seen as a front on the Jawa 300 CL, Keeway Patagonian Eagle 250, Harley-Davidson X440, Lexmoto Michigan 125 and Macbor Rockster 410, and as a rear on the Honda CB125F and CB150F, Yamaha YBR125 and Haojue DH 125. Index 57 (230 kg) covers retro classics and lightweight road bikes alike.

The matching tyre for the other axle is K80 80/100-18. For a calmer riding style where mileage matters more, the same size is available as an allround model: K66 90/90-18. Heidenau K80 carries no M+S marking — for cold-weather use Heidenau produces winter versions of other profiles, collected in the Heidenau winter motorcycle tyres section. The full range is in the Heidenau road motorcycle tyre catalogue.