On this page you’ll find the full specifications for this 225/50R18 Kumho WI31 Winter tire — including load/speed ratings, certifications (3PMS / studdable / run-flat / XL), UTQG (when provided by the manufacturer), and shipping details for Ontario and Quebec.
Quick Specs
Size: 225/50R18
Brand / Model: Kumho WI31
Season: Winter
Certifications: 3PMSF severe snow service, Studdable, XL (Extra Load)
Delivery (Ontario & Quebec): Free shipping • 1–3 business days (Ontario and Quebec)
225/50R18 Kumho WI31 Winter
3PMSF severe snow service rating indicated. Studdable option available where permitted.
How this tire is positioned
225/50R18 Kumho WI31 is positioned as a winter tire built around a 225 mm section width and 18-inch wheel fitment.
In practical terms, this size combines a 50-series sidewall of about 113 mm with a 18-inch wheel diameter, which is useful when matching an existing tire size and wheel setup.
Feature-wise, this listing indicates 3PMS certification for severe-snow service, a studdable design where permitted, an XL extra-load rating.
About the 225/50R18 tire size
The 225/50R18 size breaks down as follows:
225 — tread width in millimetres
50 — sidewall height as a percentage of tread width (approx. 113 mm)
R18 — fits a 18-inch rim
The 225/50R18 size is commonly found on sport sedans and coupes. If you’re matching an existing set, confirm the full size marking on your sidewall before ordering.
Key features — Kumho WI31 in 225/50R18
3PMSF severe snow service symbol indicated.
Studdable design (where permitted).
XL (Extra Load) rating indicated.
Size: 225/50R18 (fits an 18-inch wheel).
Ontario & Quebec — winter tire information
In Quebec, winter tires are mandatory on all passenger vehicles from December 1 to March 15 under the Highway Safety Code. In Ontario, winter tires are strongly recommended during cold-weather months and many insurance providers offer premium discounts for equipped vehicles. The 225/50R18 Kumho WI31 is a Winter tire bearing the 3PMSF severe snow service symbol, making it eligible to satisfy Quebec’s winter tire mandate.
Find tires for your vehicle
Select your year, make, model, and trim to see all compatible tires available for delivery across Ontario and Quebec:
The 225/50R18 size indicates a tread width of 225 mm, a sidewall ratio of 50% (approximately 113 mm tall), and a 18-inch rim diameter. This size is commonly found on sport sedans and coupes.
Is the 225/50R18 Kumho WI31 a Winter tire?
Yes — the 225/50R18 Kumho WI31 is categorized as a Winter tire. Winter tires are mandatory in Quebec from December 1 to March 15, and strongly recommended across Ontario during cold-weather months.
Is the 225/50R18 Kumho WI31 3PMS rated?
Yes — the 225/50R18 Kumho WI31 carries the 3PMSF (Three-Peak Mountain Snowflake) severe snow service symbol, confirming it meets recognized winter traction performance standards.
Is the 225/50R18 Kumho WI31 studdable?
Yes — the 225/50R18 Kumho WI31 is listed as studdable. Stud installation is regulated by province — Ontario bans studs on most public roads; Quebec permits them seasonally. Verify local rules before installation.
Does the 225/50R18 Kumho WI31 support run-flat driving?
No — the 225/50R18 Kumho WI31 is not listed as run-flat.
Is the 225/50R18 Kumho WI31 an XL (extra load) tire?
Yes — the 225/50R18 Kumho WI31 carries an XL (extra load) rating, enabling it to handle higher inflation pressures and greater load capacities than a standard-load equivalent.
Can I order the 225/50R18 Kumho WI31 with delivery to Ontario or Quebec?
Yes — XYZTires ships the 225/50R18 Kumho WI31 to addresses across Ontario and Quebec. Free shipping • 1–3 business days (Ontario and Quebec).