Staggered tire size checker
Enter the front and rear tire sizes of a staggered setup to see each tire's overall diameter, how far apart front and rear are, and whether the pair looks like a typical staggered fitment.
225/45R17 front, 255/40R17 rear
- Front diameter
- 25.0 in
- 225/45R17
- Rear diameter
- 25.0 in
- 255/40R17
- Rear vs front
- +0.24%
- +30 mm width, staggered, rear wider
This looks like a typical staggered pair.
The rear tire is wider and the overall diameters differ by only 0.24%, within 1%, so front and rear should turn at nearly the same rate. This only compares tire dimensions. Whether a pair fits also depends on wheel width and offset and on clearance in the fenders and suspension. Confirm any size change with your vehicle's owner's manual or a tire professional.
The rear tire (255/40R17) is 0.24% taller than the front tire (225/45R17): about 0.1 in (2 mm) more overall diameter.
It is 30 mm wider, with a sidewall 1 mm taller.
| Measurement | Front (225/45R17) | Rear (255/40R17) | Difference (rear minus front) |
|---|---|---|---|
| Overall diameter | 25.0 in (634 mm) | 25.0 in (636 mm) | +0.1 in (+2 mm), +0.24% |
| Section width | 8.9 in (225 mm) | 10.0 in (255 mm) | +1.2 in (+30 mm) |
| Sidewall height | 4.0 in (101 mm) | 4.0 in (102 mm) | 0.0 in (+1 mm) |
| Circumference | 78.5 in (1993 mm) | 78.6 in (1997 mm) | +0.2 in (+5 mm) |
| Revolutions per mile | 808 | 806 | -2 |
These are nominal design dimensions. Real tires vary by brand, tread depth, wheel width, load and pressure. Revolutions per mile at the rear are 806 against 808 at the front.
What we checked
Overall diameterClosely matched
Front and rear differ by 0.24% (0.1 in). All four wheels turn at nearly the same rate, which is what ABS, traction control, stability control and any all-wheel-drive system expect.
Section widthUsual arrangement
The rear tire is 30 mm wider than the front. A wider rear is the usual way to stagger a set, often to put more rubber under the driven rear wheels.
Wheel diameterSame wheel size
Both axles use 17-inch wheels.
Tire rotationRotation
Because the sizes differ, the tires cannot be swapped front to back. A staggered set can only be rotated side to side, and not at all if the tires are directional.
What a staggered tire setup is
A staggered setup runs different tire sizes on the front and rear axles, normally with wider tires and often larger wheels at the rear. It is common on rear-wheel-drive sports cars and performance sedans, where the extra width puts more rubber under the driven wheels. A square setup, with the same size on all four wheels, is the opposite.
A 225/45R17 front with a 255/40R17 rear is a typical example: the rear is 30 mm wider, yet the overall diameters are 25.0 in and 25.0 in, a difference of just 0.24%. The wider rear tire gets a lower sidewall so the two axles still roll at nearly the same rate.
The key idea is that width can differ but overall diameter should not. The overall diameter is the wheel diameter plus two sidewalls, and a sidewall is the tire's width times its aspect ratio. When you widen a tire you usually lower the aspect ratio, or raise the wheel diameter, to hold the diameter steady. The tire size calculator shows all the dimensions for any two sizes.
How close should front and rear be?
If the front and rear diameters differ, the two axles turn at different rates at the same road speed. ABS, traction control and stability control compare wheel speeds, and an all-wheel-drive or four-wheel-drive system expects all four wheels to turn at nearly the same rate. So staggered pairs are normally chosen with overall diameters within about 1% of each other. The common 3% rule of thumb for any size change is a looser outer limit, not a target, and it is a guideline rather than an approval.
A difference in diameter between front and rear is separate from a change from your original size. If you are also moving away from the sizes your vehicle was built with, check the speedometer error for the new rear size as well as the front.
Will this pair fit my car?
This checker looks at tire dimensions only, so it can tell you whether the pair looks like a typical staggered fitment, but not whether it fits your car. That also depends on the width of the wheels you will mount the tires on, the wheel offset, and the clearance between the tire and the fender, suspension and brake parts, especially at the rear where the wider tire sits. Load index and speed rating on each tire must also meet what the vehicle needs.
Start from the sizes printed on the door placard and sidewall (see how to read a tire sidewall), and read plus sizing wheels and tires before changing wheel diameter. Confirm any change with your vehicle's owner's manual or a tire professional.
Staggered sets also change how you look after the tires. Because front and rear are different sizes they cannot be rotated front to back, as the guide to tire rotation and alignment explains, so front and rear wear out on their own schedules.
Staggered tire questions
What is a staggered tire setup?
A staggered setup uses different tire sizes on the front and rear axles, usually with wider tires on the rear. It is common on rear-wheel-drive sports cars and performance sedans. A square setup, with the same size on all four wheels, is the opposite.
How close should front and rear tire diameters be?
As close as the sizes allow. Staggered pairs are normally chosen so the overall diameters differ by around 1% or less, and the common rule of thumb for any size change is about 3%. The reason is that ABS, traction control and stability control compare wheel speeds, and an all-wheel-drive system expects all four wheels to turn at nearly the same rate.
Can I rotate staggered tires?
Not front to back, because the front and rear sizes are different. A staggered set can only be swapped side to side, and not at all if the tires are directional. Plan on checking the tread depth of each axle separately and replacing them on their own schedule.
Can I run a staggered setup on an all-wheel-drive vehicle?
Some all-wheel-drive vehicles come from the factory with staggered sizes, so it can be done. Others expect four matching tires, and a diameter difference can strain the drivetrain. Check the owner's manual or ask the vehicle maker before changing sizes on an all-wheel-drive or four-wheel-drive vehicle.
Will this staggered pair fit my car?
This checker only compares tire dimensions. Fit also depends on the width of the wheels you are using, their offset, and the clearance in the fenders and suspension, especially at the rear where the wider tire sits. Start from the sizes your vehicle was built with, and confirm any change with a tire professional.
Why is the rear tire wider than the front?
On a rear-wheel-drive car the rear tires deliver the power and carry much of the load under acceleration, so a wider tire gives more grip there. The front tires steer and brake, and a narrower tire keeps the steering lighter and leaves room for the wheels to turn.
What if the front tire is wider than the rear?
That is a reverse stagger and it is unusual. Check that the sizes are in the right fields and confirm the setup with a tire professional before buying.