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Free Estimates — No Obligation Acima Financing — $10 Down • 100 Days Same as Cash 500+ Builds Completed in Willis, TX Serving Willis, Conroe, Montgomery & The Woodlands Mon – Fri: 8:00 AM – 5:00 PM Call Us: (936) 320-8120 Lift Kits • Leveling Kits • Wheels • Tires • Accessories
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Free Fitment Tools

Tire Size Calculator

Convert. Compare. Fit It Right.

Convert metric tire sizes to inches, compare your current setup against the one you want, and check wheel offset and backspacing — the same math we run at the counter before anything gets ordered.

Enter a metric size (like 295/60R20) or a flotation size (like 35x12.50R20).

These tools estimate — real fitment also depends on your truck, lift height, wheel choice, and fender clearance. Before anything gets ordered, we verify the full setup in person. Estimates are free, and fitment is guaranteed when we build the package.

Tire School

How To Read
A Tire Size

A metric size like 295/60R20 reads: 295 = tread width in millimeters, 60 = sidewall height as a percent of that width, and 20 = wheel diameter in inches. A flotation size like 35x12.50R20 is simpler: 35" tall, 12.5" wide, on a 20" wheel. Same tire, two languages — that's why converters exist.

  • Overall diameter is what matters for lift clearance
  • Width plus offset decides whether it rubs
  • 3%+ diameter change throws off your speedometer
Fitment Is A System

The Calculator
Is Step One

Numbers get you close — the last inch is knowing your platform: where the F-150 crash bar sits, when a RAM needs upper control arms, which offsets clear a leveled Silverado at full lock. That's the part we add. Run your numbers here, then send us the setup and we'll confirm the whole package fits before you spend a dollar.

Wheel & Tire Packages
Common Questions

Tire Size FAQ

What does 295/60R20 convert to in inches?
A 295/60R20 works out to roughly 33.9 inches tall and 11.6 inches wide — most people call it a 34-inch tire. Use the converter above for any size.
How much lift do I need for 35-inch tires?
On most half-ton trucks, a clean 35" setup with no rubbing wants a 3.5"–6" lift (ours start at $2,200 installed with alignment). Some platforms squeeze 35s onto less with aggressive offset and trimming — we'll tell you straight for your exact truck.
Will bigger tires affect my speedometer?
Yes — a taller tire covers more ground per revolution, so your speedometer reads slower than you're actually going. Past about a 3% diameter change it's worth recalibrating. The compare tool above shows your exact speedo error.
What's the difference between offset and backspacing?
Both describe where the wheel sits on the hub. Offset measures from the wheel's centerline in millimeters; backspacing measures from the mounting face to the inner lip in inches. Same idea, different reference points — the offset tool above converts between them.
Go Deeper

Fitment Guides

Wheel Offset Explained

What 20x10 -18 actually means and why offset is the reason wheels rub — or don't.

Read the guide →

What Size Lift For 35s

Platform by platform — what it really takes to clear 35-inch tires cleanly.

Read the guide →

A/T vs M/T Tires

Once you know the size, pick the tread — the honest comparison from the shop floor.

Read the guide →
Numbers Look Right?

Let's Make
Them Fit

Send us your truck and the setup you ran through the calculator — we'll confirm fitment, quote the whole package, and get it mounted, balanced, and aligned in-house.

Get A Free Estimate Call 936-320-8120