Roadx-PCR-CATALOG-20190423

Tire Basics

UHPT (Ultra High Performance Tire) is the shortened name for the best performance tire. Its aspect ratio is less
than 55 and has an inner diameter is 16" or higher.

UHP tire size label

225 / 40 Z R 18 92 Y

1 2 34 5 67

1 Normal Section Width 4 Radial Tire
5 Normal Rim Diameter
5

2 Normal Aspect Ratio

Aspect Ratio (%) = Section Height(H) x 100% 6 Load Index
Section Width(W) 7 Speed Rating

3 Speed Rating V ≤ 240 km/h
Z > 240 km/h
W ≤ 270 km/h

1 Y ≤ 300 km/h

What is a UHP Tire ? 2. Structure

1. Pattern Section width increase: Wider contact area, increased lateral strength
Section height lowered: Tire Sidewall strength increased
Innovative tread design which uses a wide pattern block to improve Rim protection strip: protects the rim, better looking
maneuverability and offer stronger grip.

Section height lowered Single Tread Radius Triple Tread Radius

Section width increase Rim protection strip

HP UHPT

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