The Nitto SN3 in size 235/45R18 is a studless winter radial tire with service description 98V. The SN3 is Nitto’s winter line for passenger vehicles, with exact size and service requirements to check before ordering.
Size and wheel specifications
- Tire size: 235/45R18
- Manufacturer stock number: 208570
- Wheel diameter: 18 in
- Nominal section width: 235 mm
- Load index / speed rating: 98V
- Load designation: XL (Extra Load)
- Approved rim-width range: 7.5–9.0 in
- Measuring rim width: 8.0 in
- Manufacturer-listed overall diameter: 26.3 in
- Manufacturer-listed overall width: 9.3 in
- Tread depth: 11/32 in
- Maximum load (single tire): 1,653 lb
- Maximum pressure (single tire): 50 psi
Nitto lists this exact stock number at 26.3 inches overall diameter and 9.3 inches overall width on the 8.0-inch measuring rim. The measuring rim is the reference for those published dimensions; the approved rim-width range is 7.5–9.0 inches.
Before ordering
Compare the complete size, load index and speed rating with your vehicle’s approved requirements. Confirm wheel width, wheel load capacity and clearance as well as diameter. A tire’s dimensions do not establish an OEM vehicle application. If changing tire size or type, have the combination and operating pressure checked by a qualified tire professional.
Questions about 235/45R18
What do the numbers in 235/45R18 mean?
The size uses a nominal 235 mm section width and an aspect ratio of 45; the sidewall height is expressed as a percentage of that nominal width. R denotes radial construction and 18 is the wheel diameter in inches. Nitto lists this exact tire at 26.3 inches overall diameter and 9.3 inches overall width on the 8.0-inch measuring rim.
What wheel width is approved for this 235/45R18 tire?
Nitto lists 7.5–9.0 inches as the approved rim-width range for stock number 208570. Its 8.0-inch measuring rim is the reference for the published dimensions, not the only approved width. The wheel must also have the correct 18-inch diameter and be suitable for the vehicle and required load.
What does the 98V XL marking tell me?
98 is the tire’s load index and V is its speed symbol. XL means Extra Load; it is a load designation, not a statement of the number of physical casing plies. Use the complete size and service description when checking a replacement against the vehicle’s approved requirements; the tire model name alone is not enough.
Is 50 psi the pressure I should run in this tire?
No. Nitto Canada lists a maximum single-tire pressure of 50 psi and, separately, a maximum single-tire load of 1,653 lb. Those columns do not prescribe the operating pressure for your vehicle or state that maximum load requires that pressure. Follow the applicable vehicle and tire guidance, and confirm operating pressure when changing tire size, type or load requirements.
Is the Nitto SN3 a winter tire or an all-season tire?
The SN3 is Nitto’s studless winter tire line. This size is 235/45R18 with service description 98V XL. Its winter classification does not establish an OEM vehicle fit; compare the complete size, approved wheel width and vehicle load requirements before choosing a winter setup.
