Tire Model Size Variant Comparator
Compare specifications across sizes of one tire model: service description, tread depth, weight and label ratings that change by size.
Compare specifications across one model’s sizes.
Tire Model Size Variant Comparator: Tire Size Inputs
Compare two tire sizes here. Use the formulas and reference tables below for this tool's specific calculation.
How Tire Model Size Variant Comparator Works?
The Tire Model Size Variant Comparator works by listing one model's published specifications for each size the model is made in. The tool uses 3 steps.
Pick the model
Choose one tire model.
Enter the sizes
Type each size of interest, for example 205/55 R16 to 255/35 R20.
Compare by size
The comparator lines up service description, tread depth, weight and label classes for each size and highlights the changes.
Tire Model Size Variant Comparator Formula
The Tire Model Size Variant Comparator measures Δ_spec = Spec(size_j) − Spec(size_ref) for each size j against a reference size.
Δ_j = x_j − x_refΔ_j% = Δ_j ÷ x_ref × 100- x_j
- Specification value for size j
- x_ref
- Value for the reference size
Worked example
Moving from 225/45 R17 to 255/35 R20 within one model drops new tread from 8.0 mm to 7.1 mm, −11%, and adds 2.4 kg (5.3 lb) of weight, +23%. The rolling resistance class moves from B to C.
Tire Model Size Variant Comparator Conversion Table
The Tire Model Size Variant Comparator conversion table shows a sample of 5 sizes of one model and the specifications that change by size.
| Size | Service description | New tread | Weight | EU label |
|---|---|---|---|---|
| 205/55 R16 | 91V | 8.3 mm | 9.1 kg (20.1 lb) | B / A / 69 dB |
| 225/45 R17 | 94W XL | 8.0 mm | 10.4 kg (22.9 lb) | B / A / 70 dB |
| 235/45 R18 | 98Y XL | 7.6 mm | 11.6 kg (25.6 lb) | C / A / 71 dB |
| 245/40 R19 | 98Y XL | 7.4 mm | 12.3 kg (27.1 lb) | C / A / 72 dB |
| 255/35 R20 | 97Y XL | 7.1 mm | 12.8 kg (28.2 lb) | C / B / 72 dB |
Values are illustrative. Real values come from the model's size chart.
What is Tire Model Size Variant Comparator?
A Tire Model Size Variant Comparator is a tool that shows how one tire model's specifications change from size to size. Reviews test one size, and buyers often need another size.
Label classes, tread depth and load ratings change by size. A tire rated A for wet grip in one size can rate B in another size.
The comparator confirms that a review's results and a warranty's terms apply to the size being bought.
What are the uses of Tire Model Size Variant Comparator?
There are 4 main uses of the Tire Model Size Variant Comparator, including review transfer and plus-size choices.
Review transfer
Check whether a reviewed size matches the size needed.
Plus-size choices
See what a larger size of the same model gives up.
Warranty checks
Confirm warranty terms by size.
Staggered sets
Compare front and rear sizes of one model.
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