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Race-focused grip with road-ready sizing
Toyo Tires 178410 brings the Proxes Sport R's high-grip compound and directional tread to a 225/40R18 package for autocross, time attack, HPDE, and other warm-weather performance use.
Key Features
- Extreme-performance summer compound developed for high dry grip
- Directional tread pattern supports predictable response at the limit
- Reinforced internal casing is designed for cornering stability
- 200 AA A UTQG rating with 7.2/32-inch tread depth
- Extra Load construction with a 92W service description
- Black sidewall and non-run-flat construction
Fitment
No year-make-model fitment applies. Confirm every dimension, interface, clearance, load, and installation requirement shown below.
| Application Type | Requirements |
|---|---|
| Dimension Based | No year-make-model fitment applies. Match 225/40R18 size, 92W service description, Extra Load construction, 7.5- to 9-inch approved rim width, 1,389-pound maximum load at 50 psi, 25.1-inch overall diameter, and vehicle clearance. Professional mounting and balancing are required. |
Specifications
| Detail | Value |
|---|---|
| Brand | TOYO |
| Manufacturer Part Number | 178410 |
| Product Type | Automotive Tires |
| Product Line | Proxes Sport R |
| Tire Size | 225/40R18 |
| Service Description | 92W |
| Load Range | Extra Load (XL) |
| Maximum Load | 1,389 lb at 50 psi |
| Approved Rim Width | 7.5-9 in |
| Section Width | 9.1 in |
| Overall Diameter | 25.1 in |
| Tread Depth | 7.2/32 in |
| UTQG | 200 AA A |
| Season | Summer |
| Sidewall | Black wall |
| Run Flat | No |
| UPC | 4981910014904 |
| Quantity | One tire |
What's Included
- One new Toyo Proxes Sport R 225/40R18 92W XL tire
- Not included: Wheel
- Not included: Valve stem and tire-pressure sensor
- Not included: Mounting, balancing, and installation service
About TOYO
Toyo Tires develops performance, competition, passenger, light-truck, and off-road tires with product-specific compounds, tread designs, and casing construction. The Proxes Sport R is Toyo's 200-treadwear extreme-performance summer line for drivers who prioritize dry grip and responsive handling.
Related Parts
FAQ
What is the 178410?It is a Toyo Proxes Sport R extreme-performance summer tire in 225/40R18 with a 92W service description and Extra Load construction.
Is this tire sold individually?Yes. The listing includes one tire. Order the required quantity for a pair or complete set.
Is this a year-make-model-specific tire?No. Compatibility depends on tire size, load and speed requirements, approved rim width, overall diameter, and available vehicle clearance.
What wheel width is approved?The verified approved rim-width range is 7.5 to 9 inches, with 7.5 inches used as the measuring rim width.
What is the maximum load?The verified maximum single-tire load is 1,389 pounds at 50 psi. Use the vehicle's specified cold pressure within the tire and wheel limits.
Is the Proxes Sport R suitable for winter weather?No. It is an extreme-performance summer tire and is not intended for snow, ice, or freezing-temperature service.
Does this listing include a wheel?No. Wheels shown in mounted tire photos are for presentation only and are not included.
Who should install this tire?A qualified tire technician should verify the application, mount and balance the tire, confirm directional orientation, set cold pressure, and check clearance.
Installation Instructions
- Confirm the vehicle requires 225/40R18 tires with at least a 92W service description and that the wheel is 7.5 to 9 inches wide.
- Inspect the wheel, valve system, and tire-pressure sensor components and replace any damaged or unsuitable parts.
- Have a qualified technician mount the tire in the correct directional orientation and balance the assembly.
- Set cold inflation pressure to the vehicle manufacturer's specification without exceeding tire or wheel limits.
- Verify fender, suspension, brake, and body clearance through the full steering and suspension range before performance use.
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