Riken UHP 225/45 R17 94Y

The Riken UHP is a high performance tire that offers excellent grip and traction in all weather conditions. It is designed for use on sports cars and high performance vehicles. The tire has a unique tread pattern that provides excellent traction and handling. The tire is also very durable and offers a long lasting performance. The Riken UHP is a high-performance tire that is designed for use in a variety of conditions, including dry and wet weather.

What does 225/45R17 mean?


The tire width is 225mm.


The aspect ratio of the tire is 45. Aspect ratio is the relative height of tire sidewall. The number refers to the percentage of sidewall height in relation to tire width.


The letter in the middle refers to tire construction. Practically all tires sold for cars are radials.

Sometimes you also see tires with RF or ZR. RF indicates the tire is run flat, whereas ZR means the tire has speed rating higher than V. These tires are also radials, as the R indicates.


Rim diameter for the tire.

225/45R17 94Y tire size

The width of 225/45R17 94Y tire is stated in millimeters and sidewall height in percentages. In this table you’ll find out the 225/45R17 94Y tire size in inches as well as few additional metrics:

In inchesIn millimeters

Section Width


Sidewall height


Diameter / Height




Rim Diameter



808 per mile 502 per kilometer

Rim Size for 225/45R17 94Y Tires

Recommended rim sizes for 225/45R17 94Y tire:

DiameterWidth Range

What does 94Y mean?

The load index 94 means that the tire has been designed to support 1477 lbs or 670 kg.

The speed index Y means that the tire has been designed to be used in speed up to 186 mph or 300 kph.

This size is usually used on passenger cars.


Riken is a Japanese tire company that was founded in 1953. The company produces a wide range of tires for passenger vehicles, commercial vehicles, and racing cars. Riken is best known for its ultra-high performance (UHP) tires that are used on some of the world’s fastest cars. Riken UHP tires are designed to provide excellent grip and handling at high speeds.

Tire Specification

Brand: Riken
Model: UHP
Season: Summer
Size: 225/45 R17
Load Index: 94 — 670 kg | x4 - 2680 kg
Speed Index: Y — 300 km\h
Car Type:Passenger
Road: City
XL / Extra Load: No
RunFlat technology: No
Commercial / Reinforced: No