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Track Day Grip That Still Gets You Home On The Street
The Toyo Proxes Sport R is an extreme performance summer tire built for autocross, time attack, endurance racing, and HPDE use while remaining street legal for the drive to and from the track. In the 225/45ZR17 94W XL size, it pairs an aggressive directional tread pattern with a reinforced internal casing to deliver strong dry handling, traction, and high speed stability for classic and modern sports cars.
Key Features
- Extreme performance summer tire designed for autocross, time attack, endurance racing, and HPDE
- Aggressive directional tread pattern for dry traction and cornering grip
- Reinforced internal casing supports high speed stability under hard driving
- High grip compound tuned for consistent performance during repeated hot laps
- 200 AA A UTQG rating with a 7/32 inch tread depth specification that meets competitive racing class requirements
- Extra Load (XL) construction for higher load carrying capacity
- 225/45ZR17 94W XL size, street legal for daily driving between track sessions
Specifications
| Detail | Value |
|---|---|
| MPN | 178310 |
| Tire Size | 225/45ZR17 |
| Load Index / Speed Rating | 94W |
| Load Range | XL (Extra Load) |
| UTQG | 200 AA A |
| Tread Depth | 7/32 in (competitive racing class spec) |
| Sidewall | Black sidewall |
| Category | Extreme performance summer |
| UPC | Not published by manufacturer for this SKU |
What's Included
- 1x Toyo Proxes Sport R tire, 225/45ZR17 94W XL
About Toyo
Toyo Tires develops passenger, performance, and off-road tires with an engineering focus on real world testing and motorsports development. The Proxes line covers everything from daily-driven all-season tires to extreme performance summer tires built for competitive track use.
FAQ
What is the Toyo Proxes Sport R 225/45ZR17 94W XL?It is an extreme performance summer tire from Toyo engineered for autocross, time attack, endurance racing, and HPDE track events, while still being street legal for daily driving. This listing is the 225/45ZR17 size with a 94W load and speed rating in Extra Load construction.
Is the Toyo Proxes Sport R legal for street driving?Yes. The Proxes Sport R is designed to deliver track capable dry performance while remaining a street legal tire, making it suitable for driving to and from track events.
What does the 200 AA A UTQG rating mean on this tire?The UTQG rating reflects a treadwear score of 200 along with the highest available traction (AA) and temperature (A) grades, indicating a tire tuned for maximum grip rather than long tread life.
What does XL mean on a tire like the Proxes Sport R?XL stands for Extra Load, meaning the tire is built with reinforced construction to carry a higher maximum load than a standard load tire of the same size.
Is the Proxes Sport R a good choice for track days and autocross?Yes. Toyo specifically engineers the Proxes Sport R for motorsports use including autocross, time attack, endurance racing, and HPDE, and it meets the 7/32 inch tread depth specification required for many competitive racing classes.
Does the Proxes Sport R perform well in wet or cold conditions?The Proxes Sport R is categorized as an extreme performance summer tire, meaning it is optimized for dry, warm weather performance and is not intended for winter or cold weather use.
What speed rating does the 225/45ZR17 94W XL Proxes Sport R carry?This size carries a W speed rating along with a 94 load index in Extra Load construction.
Will the Proxes Sport R fit any 17 inch wheel?This specific listing is sized for 225/45ZR17. Always confirm your wheel's approved rim width range before purchasing to ensure proper fitment.
Install Instructions
- Confirm your wheel's approved rim width range matches this tire size before mounting
- Have the tire professionally mounted and balanced on the wheel
- Inflate to the pressure specified on your vehicle's tire information placard, not to exceed the tire's max PSI rating
- Perform a break in period of moderate driving for the first 100 to 200 miles before aggressive track use
- Check tread depth and pressure regularly, especially before track sessions
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