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24-inch tires: sizes and treadwear
Quick answer: NHTSA’s UTQG data lists 8 tire sizes for 24-inch wheels (8 with a treadwear grade). 9 tire lines have a grade at one or more of them, and the median treadwear across line × size grades is 420. The size with the most graded lines is 305/35R24 (7).
8graded sizes
9lines
420median grade
22line × size grades
24-inch sizes in the NHTSA data
| Size | Graded lines | Highest treadwear | Median treadwear |
|---|---|---|---|
| 305/35R24 | 7 | 500 | 420 |
| 295/35R24 | 5 | 500 | 420 |
| 255/30R24 | 3 | 500 | 500 |
| 275/25R24 | 3 | 500 | 420 |
| 285/40R24 | 1 | 420 | 420 |
| 315/35R24 | 1 | 420 | 420 |
| 325/45R24 | 1 | 420 | 420 |
| 335/30R24 | 1 | 240 | 240 |
Sizes link only where this build has a page. Click a heading to sort.
Treadwear mix at 24 inches
Brands with the most 24-inch lines
| Brand | Lines graded at 24 inches |
|---|---|
| Nexen | 2 |
| Continental | 1 |
| Goodride | 1 |
| National | 1 |
| Toyo | 1 |
| Venezia | 1 |
| Western Auto | 1 |
| Yokohama | 1 |
Highest treadwear grades at 24 inches
| Tire line | Size | Treadwear |
|---|---|---|
| Venezia Strada IV | 305/35R24 | 500 |
| Venezia Strada IV | 295/35R24 | 500 |
| Toyo Crusade SUV | 255/30R24 | 500 |
| Venezia Strada IV | 255/30R24 | 500 |
| Venezia Strada IV | 275/25R24 | 500 |
| Nexen ROADIAN HP | 305/35R24 | 460 |
| Nexen ROADIAN HP | 295/35R24 | 460 |
| National Velozza ZXV4 | 305/35R24 | 420 |
Guides that explain these numbers
FAQ
What does the 24 mean in a tire size?
In a size like 225/65R24, the number after R is the wheel (rim) diameter in inches. It must match your wheel exactly; width and aspect ratio come from your vehicle's placard.
What is the most common 24-inch tire size in NHTSA's data?
By number of graded lines, 305/35R24 (7 line × size grades), followed by 295/35R24 (5). This reflects what is in the NHTSA database, not sales.
What is the typical treadwear grade for 24-inch tires?
The median across 22 line × size grades is 420. Treadwear is the maker's wear rating relative to a control tire, not miles.