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 2026-04-30Long-form guides on tire choice, fitment, warranty, and replacement. Written for owners, verified against manufacturer documentation.
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 2026-04-30Three 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 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 2026-04-30The 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 2026-04-30The 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 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 2026-04-30Electric 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 2026-04-30Tire 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 2026-04-30All-season SUV tires range from rugged crossover-focused designs to truck-derived all-terrains. The right choice depends on three variables: vehicle weight, climate, and ground clearance. Here's how to think it through.
Updated 2026-05-01Dedicated winter tires deliver 20-40% better ice braking than all-seasons. Here's how to pick between studless ice tires, performance winter tires, and studded versions for your snow conditions.
Updated 2026-05-01Walmart house brands cost $60-100 per tire; Michelin and Continental cost $180-280. The difference isn't 3x performance. Here's what changes and where the budget option is genuinely OK.
Updated 2026-05-01Run-flat tires can survive 50 miles at 50 mph with zero pressure — but cost 20-40% more, ride harshly, and can't be repaired. Here's whether to stay run-flat or switch to standard.
Updated 2026-05-01All-terrain tires balance road + off-road. Mud-terrain tires sacrifice on-road manners for serious off-road grip. Here's the honest performance gap and where each fits.
Updated 2026-05-01Cabin noise above 40 mph is mostly tire-driven. Here's how dB ratings work, what tread features make a tire quiet, and which fixes actually move the needle.
Updated 2026-05-01Rotation moves tires position to even out wear. Balancing corrects weight distribution to eliminate vibration. They sound similar; they fix different problems. Here's when each matters.
Updated 2026-05-01Tire pressure drops ~1 PSI for every 10°F drop in temperature. Most US drivers don't check pressure until the TPMS warning lights — costing them range and tread life all summer too.
Updated 2026-05-01Direct TPMS sensors live inside the wheel and last 5-10 years. When one dies, do you replace just one or all four? Here's how to decide.
Updated 2026-05-01A bulge means immediate replacement. A scuff is cosmetic. A cut needs measurement. Here's the practical decision tree from a tire safety perspective.
Updated 2026-05-01Not every flat needs a new tire. Here's the decision tree for repair vs replace based on hole location, size, age, and tire type.
Updated 2026-05-01Winter tires sitting in a hot garage degrade faster than ones in use. Here's the practical storage protocol for getting maximum life from a seasonal set.
Updated 2026-05-01Three services, three different problems, often confused. Here's how to diagnose what your car actually needs.
Updated 2026-05-01The yellow-and-black sticker on your driver door jamb has more usable info than the owner's manual. Here's what each line means and which numbers matter.
Updated 2026-05-04Tow a trailer near your truck's GVWR and tire load index becomes the safety bottleneck. Here's how to size tires for towing, what pressure to run, and which trucks need LT tires vs passenger.
Updated 2026-05-05Online tire retailers typically save $40–$80 per tire versus local; local shops trade that against same-day install and bundled services. Here's how to pick the right channel for your situation.
Updated 2026-05-08The three main tread layouts perform differently in wet weather, dry handling, and tire-rotation flexibility. Here's the engineering trade-off behind each.
Updated 2026-05-11All-wheel-drive systems require tires within ~3/32 of an inch of each other in tread depth. Mix them wrong and you cook the center differential. Here's the rule.
Updated 2026-05-14Most tire warranty claims get rejected — not because the claim is invalid, but because the paperwork isn't complete. Here's how to win a claim.
Updated 2026-05-17NHTSA issues 50-150 tire-related recalls per year. Here's how to check if yours is affected and what the manufacturer covers.
Updated 2026-05-17Tesla Model 3 owners report 25-30k miles on OEM tires vs 50k+ on equivalent ICE cars. Three factors drive this; two are fixable.
Updated 2026-05-17