The width of a tire — measured in millimetres across the tread from sidewall to sidewall — is the first number in a standard tire size like 225/45R17. It has a direct impact on your vehicle’s performance, handling, and fuel economy, and choosing the right width matters as much as any other part of the tire size specification.

Wider tires provide a larger contact patch with the road, which generally improves dry-road cornering grip and braking performance. Narrower tires typically offer lower rolling resistance (which supports fuel economy) and better cutting ability in snow and slush — which is why dedicated winter tires in Canada are sometimes fitted in a slightly narrower width than the vehicle’s summer or all-season fitment.

Every vehicle has a recommended tire width range set by the manufacturer, found in your owner’s manual or on the door jamb label. Staying within that range ensures correct handling balance, steering geometry, and wheel arch clearance. Going significantly wider or narrower than the recommended range can affect your vehicle’s safety systems, speedometer accuracy, and fuel economy.

Canada Tire Pro stocks tires across all common widths — from narrow 165mm economy car tires to wide 285mm and 305mm truck fitments. Whether you’re shopping by vehicle or by size, our Calgary and Edmonton teams can confirm the right width for your specific needs and check current stock. Same-day fitting is available.