Data sheet TS-285/45R22 · Size
285/45R22 in inches
By the formula 285/45R22 measures 32.1 in (815 mm) overall diameter. It makes 628 revolutions per mile (390 per km).
Fig. 1 — Cross-section
Table 1 — Nominal dimensions
| Item | in | mm |
|---|---|---|
| DOverall diameter | 32.10 | 815 |
| ASection width | 11.22 | 285 |
| BSidewall | 5.05 | 128.3 |
| CRim | 22 | 558.8 |
| Circumference | 100.8 | 2,561 |
| Revs per mile · km | 628 | 390 |
| Flotation size printed | 32X11.50R22 | Mickey Thompson |
|---|---|---|
| Measuring rim | 9.5″ | Nitto P |
Table 2 — Measured range
32.09–32.30″overall diameter, 12 tires from 5 makers (math: 32.10″)
10.0–16.0/32″new tread depth
0 LT · 12 Pversions in the makers’ tables we read
All 12 tires ↓Table 3
12 tires in 285/45R22, as published
One row per model and type, from each maker’s size table. LT first, then P-metric; sorted by diameter.
The math says 32.10″. 12 tires from 5 makers measure 32.09″–32.30″. Tallest here: Mickey Thompson Baja Boss A/T (all-terrain), 32.30″. Check the maker’s number before you buy for a tight fit.
| Tire | Type | Diameter | Width | Rims, in | Weight | Tread | Max load |
|---|---|---|---|---|---|---|---|
| Nitto Ridge Grapplernittotire.com · Oct 15, 2026 | XL 114Q | 32.09″ | 11.22″ | 9.0–10.5 | 44.7 lb | 13.5/32″ | 2,601 lb @ 50 psi |
| Nitto Recon Grappler A/Tnittotire.com · Oct 15, 2026 | XL 114H | 32.09″ | 11.22″ | 9.0–10.5 | 43.6 lb | 13.6/32″ | 2,601 lb @ 50 psi |
| Nitto Terra Grappler G3nittotire.com · Oct 15, 2026 | XL 114H | 32.09″ | 11.22″ | 9.0–10.5 | 44.7 lb | 13.6/32″ | 2,601 lb @ 50 psi |
| Firestone Destination A/T2firestonetire.com · Oct 15, 2026 | XL 114H | 32.10″ | — | 9.0–10.5 | 40.6 lb | 12.0/32″ | — |
| Firestone Destination LE3firestonetire.com · Oct 15, 2026 | SL 110H | 32.10″ | — | 9.0–10.5 | 38.2 lb | 10.0/32″ | — |
| Firestone Destination LE4firestonetire.com · Oct 15, 2026 | SL 110H | 32.10″ | — | 9.0–10.5 | 41.3 lb | 12.0/32″ | — |
| Kumho Road Venture AT52kumhotireusa.com · Oct 15, 2026 | XL 114T | 32.10″ | 11.20″ | 9.0–10.5 | 43.8 lb | 11.7/32″ | 2,601 lb @ 50 psi |
| Kumho Crugen HT51kumhotireusa.com · Oct 15, 2026 | XL 114H | 32.10″ | 11.20″ | 9.0–10.5 | 42.8 lb | 12.0/32″ | 2,601 lb @ 50 psi |
| Toyo Open Country A/T IIItoyotires.com · Oct 15, 2026 | XL 114H | 32.10″ | 11.20″ | 9.0–10.5 | 44.0 lb | 13.6/32″ | 2,601 lb @ 50 psi |
| Toyo Open Country R/T Trailtoyotires.com · Oct 15, 2026 | XL 114T | 32.10″ | 11.20″ | 9.0–10.5 | 43.0 lb | 13.6/32″ | 2,601 lb @ 50 psi |
| Toyo Open Country H/T IItoyotires.com · Oct 15, 2026 | XL 114H | 32.10″ | 11.20″ | 9.0–10.5 | 42.0 lb | 11.1/32″ | 2,601 lb @ 50 psi |
| Mickey Thompson Baja Boss A/Tmickeythompsontires.com · Oct 15, 2026 | XL 114T | 32.30″ | 11.30″ | 9.0–10.5 | 49.0 lb | 16.0/32″ | 2,601 lb @ 50 psi |
§ 1
Nominal numbers by the formula
By the formula 285/45R22 has an overall diameter of 32.1 in (815 mm). The section width is 11.2 in (285 mm) and the sidewall height is 5.0 in (128 mm). Rim diameter is 22 in (559 mm).
Circumference is 100.8 in (2,561 mm). Revolutions per mile are 628 (390 per km). These are unloaded nominal numbers; real tires measure slightly differently; the formula is in the notes below.
§ 2
What makers publish for 285/45R22
Tire makers list 12 tires in 285/45R22 from five brands. All 12 are P-metric passenger versions; none listed are LT. Makers publish load ranges SL and XL and approved rim widths 9.0–10.5 in (measuring rim often 9.5 in).
Published overall diameters run 32.09 in to 32.3 in against the 32.10 in nominal diameter (0.0% to +0.6%). Published weights run 38.2 lbs to 49 lbs. New tread depths run 10/32 in to 16/32 in.
- Nitto Ridge Grappler: 32.09 in diameter; overall width 11.22 in; weight 44.7 lbs; tread depth 13.5/32 in (Nitto).
- Toyo Open Country A/T III: 32.1 in diameter; overall width 11.2 in; weight 44 lbs; tread depth 13.6/32 in; maker lists 647 revs per mile (Toyo).
- Mickey Thompson Baja Boss A/T: 32.3 in diameter; section width 11.3 in; weight 49 lbs; tread depth 16/32 in; maker lists equivalent 32X11.50R22 (Mickey Thompson).
§ 3
Closest sizes and effects
The neighbor table uses a ±3% overall-diameter window on similar rims. The ±3% window is a tire-shop rule of thumb, not a law.
Close sizes include 275/50R21 (31.8 in, −0.8%), 265/50R22 (32.4 in, +1.0%) and 275/45R22 (31.7 in, −1.1%). Small diameter changes alter indicated speed, axle height and revs per mile.
- 275/50R21: diameter −0.8% (−0.27 in, −7 mm); an indicated 60 mph is 59.5 mph; axle ground clearance −0.14 in (−3 mm); revs 628 → 634.
- 265/50R22: diameter +1.0% (+0.33 in, +9 mm); an indicated 60 mph is 60.6 mph; axle ground clearance +0.17 in (+4 mm); revs 628 → 622.
- Use the comparison tool or the speedometer calculator to see effects for other neighbors.
Fig. 2
285/45R22 and the sizes next to it
To scale, on one ground line. Diameter by the formula.
Table 4
Compare 285/45R22 with another size
Type any size: diameter, sidewall, speedometer and clearance change against this one.
Comparison
295/45R22 is 32.45″ tall, +1.10% against 285/45R22. At 60 mph on the dial you drive 60.7 mph.
| Item | 285/45R22 | 295/45R22 | Change |
|---|---|---|---|
| Overall diameter | 32.10″ | 32.45″ | +0.35″ +1.10% |
| Section width | 11.22″ | 11.61″ | +0.39″ |
| Sidewall | 5.05″ | 5.23″ | +0.18″ |
| Circumference | 100.8″ | 102.0″ | +1.1″ |
| Revs per mile | 628 | 621 | −7 |
| Axle height | 16.05″ | 16.23″ | +0.18″ |
When the odometer counts 1,000 miles, you have driven 1,011.0 miles.
Engine RPM at the same road speed: −1.1%. Gear ratio calculator
Speedometer
| Dial shows | True speed | Difference |
|---|---|---|
| 30 mph | 30.3 mph | +0.3 |
| 45 mph | 45.5 mph | +0.5 |
| 60 mph | 60.7 mph | +0.7 |
| 70 mph | 70.8 mph | +0.8 |
| 80 mph | 80.9 mph | +0.9 |
285/45R22295/45R22
Note 1
P-metric or LT in the same size
0 LT and 12 P versions in the tables we read.
No single model in our tables is published in both P and LT versions of 285/45R22; Table 3 lists both types side by side.
On trucks and SUVs, the load ratings of the tires on an axle must add up to at least the axle’s GAWR on the certification label (49 CFR 571.110).
Vehicles on 285/45R22: not listed yet. We add a vehicle here only from its maker’s own spec sheet for that year and trim.
The size your vehicle left the factory on is printed on the tire and loading placard on the driver’s door jamb (49 CFR 571.110). Pressure and load: that placard too.
Table 5
Within 3% of 285/45R22
Same rim or ±1″, diameter within 3%. A shop rule of thumb, not a law.
| Size | Diameter | Width | vs 285/45R22 | At 60 mph | Clearance |
|---|---|---|---|---|---|
| 275/50R21 | 31.83″ | 10.8″ | −0.8% | 59.5 | −0.14″ |
| 265/50R22 | 32.43″ | 10.4″ | +1.0% | 60.6 | +0.17″ |
| 275/45R22 | 31.74″ | 10.8″ | −1.1% | 59.3 | −0.18″ |
| 305/40R22 | 31.61″ | 12.0″ | −1.5% | 59.1 | −0.25″ |
| 305/45R22 | 32.81″ | 12.0″ | +2.2% | 61.3 | +0.35″ |
| 275/50R22 | 32.83″ | 10.8″ | +2.3% | 61.4 | +0.36″ |
| 33x12.50R22 | 33.00″ | 12.5″ | +2.8% | 61.7 | +0.45″ |
Other 22″ sizes
Q&A
Common questions
What is the overall diameter of 285/45R22?
By the size formula the overall diameter is 32.1 in (815 mm). Makers publish diameters from 32.09 in to 32.3 in.
How many revolutions per mile does it make?
Nominal revolutions per mile are 628 (390 per km). Toyo lists 647 revs per mile for its Open Country A/T III in this size.
Does the tire show load and rim information on the sidewall?
The sidewall shows the maximum load rating and, for LT tires, the load range letter (49 CFR 571.139). Manufacturers must publish the rims that may be used with each tire (49 CFR 571.139).
Where do I find the vehicle inflation and load limits?
See the tire and loading placard on the driver's door jamb for the vehicle maker’s recommended cold inflation pressures and vehicle load limits (49 CFR 571.110).
Notes
Method and sources
Each number and rule comes from a source with the date it was checked.
- Sidewall = width × aspect ratio ÷ 100
- Diameter = rim × 25.4 + 2 × sidewall (mm)
- Revs per mile = 63,360 ÷ (π × diameter, in)
- True speed = dial × new diameter ÷ old diameter
- Clearance change = half the diameter change
Numbers are nominal: the tire unloaded, on its measuring rim. Revs per mile published by makers run higher than the formula. “Within 3%” is a rule of thumb tire shops use, not a law. Tire pressure: the placard on your door jamb.
- Nitto: size table (nittotire.com)checked Oct 15, 2026
- Toyo: size table (toyotires.com)checked Oct 15, 2026
- Mickey Thompson: size table (mickeythompsontires.com)checked Oct 15, 2026
- Nitto: size table (nittotire.com)checked Oct 15, 2026
- Nitto: size table (nittotire.com)checked Oct 15, 2026
- Firestone: size table (firestonetire.com)checked Oct 15, 2026
- Firestone: size table (firestonetire.com)checked Oct 15, 2026
- Kumho: size table (kumhotireusa.com)checked Oct 15, 2026
- 49 CFR 571.139 (FMVSS No. 139), S5.5(d)ecfr.gov · checked Oct 15, 2026
- 49 CFR 571.110 (FMVSS No. 110), S4.3ecfr.gov · checked Oct 15, 2026
Related
Calculators and size classes
- Tire size calculatorTwo sizes: diameter, sidewall, revs and speedometer.
- Compare up to 4 sizesUp to four sizes side by side, drawn to scale.
- Metric ↔ inchesMetric to inches, and 33x12.50R20 to metric.
- Speedometer errorTrue speed after a size change.
- Gear ratio and RPMEngine RPM and the ratio to regear to.
- Wheel offset and pokeBackspacing, poke and inner clearance.
- DOT date codeHow old a tire is, from the DOT number.
- Load index chartLoad index in pounds and kilograms.
- Bolt patternMeasure it, convert inches to mm.
- Rim size and tire fitWhat 17x8 ET35 means, which sizes go on it.
- What fits my carStart from the placard on the door.
- Tire size chartCommon sizes in inches, by rim.