Staggered Tire Size Calculator
Plan staggered front and rear tire sizes. Compare front and rear diameter, width and circumference gaps for RWD and AWD cars.
Compare front and rear sizes.
Staggered Tire Size Calculator: Tire Size Inputs
Compare two tire sizes here. Use the formulas and reference tables below for this tool's specific calculation.
How Staggered Tire Size Calculator Works?
The Staggered Tire Size Calculator works by calculating the front and rear tire dimensions separately and reporting the front-to-rear gap in diameter, width and rolling circumference. The tool uses 4 steps.
Enter the front size
Type the front tire, for example 245/40 R19.
Enter the rear size
Type the wider rear tire, for example 275/35 R19.
Compare axles
The calculator shows the width stagger (30 mm, 1.18 in) and the diameter gap between axles.
Check drivetrain limits
The calculator flags a front-to-rear gap above the limit entered for the drivetrain, often 1% to 2% on AWD cars.
Staggered Tire Size Calculator Formula
The Staggered Tire Size Calculator formula is Δ%_axle = (OD_rear − OD_front) ÷ OD_front × 100, and the width stagger is W_rear − W_front.
Δ% = (OD_r − OD_f) ÷ OD_f × 100ΔW = W_r − W_fΔW ÷ 2- OD_f, OD_r
- Front and rear diameter (mm)
- W_f, W_r
- Front and rear width (mm)
Worked example
A 245/40 R19 front tire measures 678.6 mm, and a 275/35 R19 rear tire measures 675.1 mm. The axle gap is -0.52%, and the width stagger is 30 mm (1.18 in).
Staggered Tire Size Calculator Conversion Table
The Staggered Tire Size Calculator conversion table compares front and rear diameter for 6 staggered setups.
| Front / rear | Front diameter | Rear diameter | Axle gap | Width stagger |
|---|---|---|---|---|
| 225/40 R18 / 255/35 R18 | 637.2 mm | 635.7 mm | -0.24% | 30 mm |
| 245/40 R19 / 275/35 R19 | 678.6 mm | 675.1 mm | -0.52% | 30 mm |
| 245/35 R20 / 275/30 R20 | 679.5 mm | 673.0 mm | -0.96% | 30 mm |
| 235/40 R18 / 265/35 R18 | 645.2 mm | 642.7 mm | -0.39% | 30 mm |
| 255/40 R19 / 285/35 R19 | 686.6 mm | 682.1 mm | -0.66% | 30 mm |
| 245/45 R18 / 275/40 R18 | 677.7 mm | 677.2 mm | -0.07% | 30 mm |
What is Staggered Tire Size Calculator?
A Staggered Tire Size Calculator is a tool that compares the front and rear tire sizes of a vehicle that runs different widths on each axle. Staggered setups put wider tires on the rear to carry more drive torque and weight.
Rear-wheel-drive (RWD) sports cars accept a small diameter gap between axles. AWD vehicles need a much closer match, so AWD staggered sizes are engineered to land within about 1%.
Staggered setups stop front-to-rear tire rotation. Tires on each axle wear at different rates and are replaced in pairs.
What are the uses of Staggered Tire Size Calculator?
There are 4 main uses of the Staggered Tire Size Calculator, including performance builds and AWD checks.
Performance builds
Plan a wider rear tire for more traction.
AWD checks
Confirm a staggered set stays inside the AWD system's limit.
Rake adjustment
Use a taller rear tire to raise the rear slightly.
Replacement pairs
Confirm a replacement rear pair matches the stagger of the original set.
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