If you’ve ever stood in a cold garage trying to figure out which snow chains fit your tires, you’re not alone. That’s why we created this free Tire Chain Size Calculator.
It’s simple: Just enter your tire’s width, aspect ratio, and rim size (you’ll find this on the sidewall of your tire, like 265/70R17). We’ll instantly tell you the chain size that fits your tire.
Tire Chain Size Calculator
Enter your tire size to find the right chain fit.
Why Chain Size Matters
Chains that are too small won’t go on. Chains that are too big can slip off or damage your vehicle. Using the correct chain size:
- Keeps you safe on icy or snowy roads
- Protects your fenders, wheel wells, and brakes
- Makes installation faster and easier
Where to Find Your Tire Size
Look for a label on the tire that reads something like: 265/70R17
That means:
- 265 mm wide
- 70% sidewall height (aspect ratio)
- 17-inch rim
Just enter those numbers into the calculator and you’re good to go.
Works For
- Passenger vehicles (cars, SUVs, trucks)
- Light-duty trailers
- Off-road tires
- Winter tires
Example
Let’s say you have a 265/70R17 tire. The calculator will estimate the total tire diameter (about 31.6 inches) and help you find chain sets labeled for that size.
Some chains will show “Fits 265/70R17” directly on the box. Others may use an inch-based system like “Fits 31–32 inch tires.
Need to Know Before Buying Chains
- Not all chains are the same. Some are cable style, others are V-bar, ladder style, or diamond pattern.
- Check local laws — some areas require “Class S clearance” or only allow chains on certain days.
- Always test fit before the snow hits. You don’t want your first try to be in a blizzard.
Summary
Use this tire chain size calculator to save time, avoid mistakes, and get back on the road safely. It’s simple, accurate, and works for all common tire types.