How to read tire sidewall codes
Every tire's sidewall encodes its width, aspect ratio, rim diameter, load index, speed rating, and a four-digit production date. Here's how to decode each marking and what to act on.
Updated 2026-04-30Tire buyer guides
Long-form guides on tire choice, fitment, warranty, and replacement. Written for owners, verified against manufacturer documentation.
When to replace your tires: tread depth, DOT date, and the inspections that matter
Three independent reasons to replace tires: tread depth at the wear bar, age at six to ten years, and damage. Here's how to check each, what gauges to use, and which replacement triggers are commonly missed.
Updated 2026-04-30UTQG ratings explained: what 320 AA A actually tells you
UTQG treadwear, traction, and temperature ratings are stamped on every passenger tire sold in the US. Here's what each grade means, how it's tested, and where the ratings are actually useful — and where they aren't.
Updated 2026-04-30All-season vs all-weather vs winter tires: which one belongs on your car
The three categories of cold-weather-capable tire are not interchangeable. Here's the difference between an M+S all-season, a 3PMSF-rated all-weather, and a dedicated winter tire — and which one is right for which climate.
Updated 2026-04-30Tire warranties explained: mileage warranty, road hazard, and what's actually covered
The mileage warranty on a tire is not what most owners assume. Here's the breakdown of treadwear warranty vs road hazard, how the proration math works, and which warranties are worth paying for.
Updated 2026-04-30Plus-sizing 101: going up a wheel size without breaking your car
Plus-sizing replaces a smaller wheel and taller sidewall with a larger wheel and shorter sidewall. Done right it improves handling without affecting speedometer or ride. Done wrong it breaks alignment, ride, and clearances. Here's the math.
Updated 2026-04-30EV tires: why your Model 3 doesn't take regular tires
Electric vehicles weigh more, accelerate harder, and have unique noise environments that show off tire noise that ICE cars masked. Here's what makes an EV-rated tire different and which models are worth the premium.
Updated 2026-04-30How much does tire installation cost? State-by-state breakdown
Tire mount, balance, valve stem, and disposal fees vary widely across the US. Here's a realistic price range by state, what's bundled and what's not, and which chains are most predictable.
Updated 2026-04-30