Low-profile tires — short sidewalls, big wheels — became standard equipment on sports cars in the 1990s and increasingly common on regular cars in the 2010s. They look great. They handle great. They also cost more, ride harder, and damage easier. Here's the full picture.
What 'low profile' means
The aspect ratio in a tire size — the second number — tells you the sidewall height as a percentage of width. A 255/35R20 has a 35% aspect ratio, which is genuinely low profile. A 215/65R17 has 65% — a tall, comfortable sidewall.
Anything 50 or below is typically called low-profile. 40 and below is ultra-low-profile, almost always on performance cars.
What you gain
- Sharper steering response — less sidewall flex during cornering
- Less body roll feel
- More room for big brakes (the rotors live inside the wheel)
- Aesthetic — the big-wheel look most cars are styled around today
What you give up
- Ride comfort — short sidewalls don't absorb road impacts
- Wheel damage risk — every pothole goes straight to the rim
- Tire price — 18+ inch performance tires cost significantly more
- Tread life — performance compounds wear faster
- Snow capability — low-profile snow tires exist but are limited
- Replacement availability — odd sizes can be hard to find
The pothole problem
A tire with a 6-inch sidewall absorbs a pothole impact across that whole height of rubber. A tire with a 2-inch sidewall has very little material between the wheel and the road. Drivers with 20-inch+ wheels report bent rims at a much higher rate than drivers with 16-17 inch wheels — sometimes from impacts that wouldn't have damaged a taller-sidewall tire at all.
If your car came with them
Run them. The car was tuned for the geometry of those wheels. Try to drive a little more carefully on pothole-laden streets. Consider tire insurance through your retailer for an extra 5-10% on the tire price.
If you're plus-sizing
Plus-sizing means putting a larger wheel with a shorter sidewall on a car that came with smaller wheels. Stay within 3% overall diameter of the original, and don't go more than two sizes up — past that, ride and reliability suffer faster than the aesthetic gain is worth.
Low profile is a real engineering tradeoff, not a free upgrade.