The Summit Ultramax 4S is an all-weather tire for passenger cars, CUVs, SUVs and light trucks. It is built to provide confident traction whatever the forecast brings, along with responsive handling and a comfortable ride on the journey.
The 235/50R18 size is rated 101V for load and speed with extra load (XL) construction. It offers 11/32-inch tread depth, a 50 psi maximum inflation pressure, a UTQG rating of 500AA and an overall diameter of about 27.3 inches.
| Tire size | 235/50R18 |
| Tire load index | 101 |
| Tire speed rating | V |
| Tire load range | Extra Load |
| Tire season | All-Weather |
| Tire terrain | Highway Terrain |
| Uniform tire quality grade (utqg) | 500AA |
| Tire sidewall style | Black Sidewall |
| Tread depth | 11/32 |
| Overall diameter | 27.3 in |
| Manufacturer | Summit |
| Tire width | 235 mm |
| Vehicle fitment type | Universal |
| Is run flat | N |
| Vehicle type | Car |
| Construction type | Radial |
| Electric vehicle tire | N |
| Automotive parts division | Performance |
| Wheel diameter | 18 in |
| Flotation tire | N |
| Maximum vehicle rim width | 8.5 in |
| Features | Fits Multiple Makes And models |
| Items included | Tire Only |
| Minimum vehicle rim width | 6.5 in |
| Total count | 1 |
| Vehicle class designator | P |
| Tire location | Front and Rear Tires |
| Tire diameter | 18 in |
| Tire type | Sport Utility Vehicle Tires, Performance Tires, Light Truck & SUV Tires |
| Model | Ultramax 4S 1603891 |
| Maximum inflation pressure | 50 psi |
| Tire aspect ratio | 50 |
Specifications are as published by the manufacturer. Please confirm the size against the placard on your vehicle before ordering.