Race Tire

The design and components of the Proxes RA1 came from our experiences winning races all over the world. This DOT competition tire* is well-known by road racers for delivering quick lap times, consistency and long wear.

*Caution: Recommended for competition events only.

3.5 Dry Handling
5.0 Wet Handling
5.0 Tread Life
4.5 Braking

Soft But Durable R-Compound

  • Improves grip for better competitive handling and performance.

Stepped Tread Design

  • Increased tread area and limited void improves dry traction.
  • Groove arrangement assists with wet traction.

Tread depth indicators

  • Circles in tread indicate tread depth.
  •  Full 8/32nds tread depth provides good competitive wet traction.
  • Shaving to 6/32nds improves dry traction.

Download brochure: Proxes RA1

Tire Size Product Code Approved Rim Width Range (inch) Overall Diameter (inch) Overall Width (inch) Tread Depth (1/32")
225/45ZR15 236970 7.0-7.5-8.5 22.9 9 8
205/50ZR15 236840 5.5-0.0-7.5 23 8.3 8
225/50ZR15 236830 6.0-0.0-8.0 23.7 9.1 8
245/45ZR16 236800 7.5-0.0-9.0 24.4 9.8 8
P225/50ZR16 236890 6.0-7.0-8.0 24.7 9 8
P255/50ZR16 236880 7.0-8.0-9.0 25.8 10.3 8
235/40ZR17 236760 8.0-8.5-9.5 24.4 9.6 8
255/40ZR17 236770 8.5-9.0-10.0 25.1 10.4 8
275/40ZR17 236780 9.0-9.5-11.0 25.6 11 8
275/35ZR18 236710 9.0-9.5-9.5 25.6 10.9 8

Toyo Tires warranty program


Race-prepared vehicles such as:
BMW e30
Mazda Miata MX-5
Porsche Boxster
Porsche 944
Honda CRX
Honda Civic
Honda S2000

Setup Guidelines

Toyo Tires recommends the following general set up guidelines for the Proxes RA1:

  • Operating Temperature: 71°c to 104°c (160°F to 220°F)
  • Hot Inflation Pressures: High 30s to Low 40s (psi)
  • Camber: -2.5° to -5.0°
  • Caster: As much positive as possible
  • Shaving: 4/32” is recommended for competition  (grooves remain until 2/32”)
  • Rim width: a tire size that falls within the range of midpoint to maximum rim widths is recommended

Proxes RA1 Safety Advisory

  • The tread compound is specifically designed to operate under racing conditions making it difficult to achieve optimum  adhesion levels under normal street driving.
  • The shallower tread depth of 6/32nds limits the tire’s performance capabilities under normal street driving conditions.
  • Performance limitations are particularly evident in low  ambient temperatures or during the spring and fall when ambient temperatures fluctuate significantly.
  • Wet performance is limited when operating outside the optimum temperature range, and when the tire is at less than full tread depth.
  • Do not use the tire if it has cracked.

For recommendations on proper use, handling and storage of this tire in colder climates, please click here.

Proxes RA1

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