What Size Tire Is A 295 70R18? | Inch Specs That Matter

A tire with this size code is about 34.3 inches tall, 11.6 inches wide, and built for an 18-inch wheel.

If you want the plain answer, a 295/70R18 tire comes out to about 34.3 inches in overall diameter. Its section width is about 11.6 inches, and each sidewall is about 8.1 inches tall. That makes it a tall, wide truck or SUV tire with a chunky profile and a lot more sidewall than a low-profile street tire.

That number string looks dense at first glance. Once you break it apart, it gets easy. The first number is the width, the second is the sidewall ratio, and the last part tells you the wheel size. From there, you can tell how tall the tire stands, how much wheel-well room it needs, and how close it sits to common “34-inch” and “35-inch” labels.

295/70R18 Tire Size Meaning On The Sidewall

The standard way to write this size is 295/70R18. The slash is normal on the sidewall. Your keyword drops the slash, though it points to the same tire size.

Here’s what each part means:

• 295 = tire width in millimeters, measured across the widest part of the sidewall
• 70 = sidewall height as 70% of the width
• R = radial construction
• 18 = wheel diameter in inches

That middle number does a lot of work. A 70-series tire has a tall sidewall, so it adds ride cushion, gives the tire a fuller look, and pushes total diameter up fast. On a truck, that usually means more ground clearance and a beefier stance. It also means more room is needed at the fender liner, mud flap, and suspension parts when you turn lock to lock.

What Size Tire Is A 295 70R18? In Plain Numbers

Here’s the math behind it. Width starts at 295 millimeters. Convert that to inches and you get 11.6. Then take 70% of 295 to get the sidewall height: 206.5 millimeters, or 8.1 inches. Since the tire has a sidewall above and below the wheel, you double that sidewall height and add the 18-inch wheel.

The result is an overall diameter of about 34.3 inches. Circumference lands at about 107.6 inches, which works out to about 589 revolutions per mile. That puts this size a bit under a true 35-inch tire, though it’s close enough that many truck owners lump it into the same visual class.

If you like checking the formula yourself, Tire Rack’s tire dimension formula uses the same width, aspect ratio, and wheel-diameter method.

Measurement	Value	What It Tells You
Section width	295 mm	Width across the sidewall
Section width	11.6 in	Inch version of the same width
Aspect ratio	70	Sidewall height is 70% of width
Sidewall height	206.5 mm	Height of one sidewall
Sidewall height	8.1 in	One sidewall in inches
Wheel diameter	18 in	Wheel this tire fits
Overall diameter	34.3 in	Total tire height when mounted
Circumference	107.6 in	Distance covered in one full turn
Revs per mile	About 589	Handy for gearing and speedometer checks

What Those Numbers Mean On The Road

A 34.3-inch tire is tall enough to change how a truck feels and sits. If you’re stepping up from a stock tire in the 32-inch range, this size can fill the wheel wells much more fully. It can also soften the speedometer reading, since a taller tire covers more ground with each turn.

Width matters too. At 11.6 inches, a 295 is no narrow tire. On the right wheel width, it looks square and planted. On a wheel that runs too narrow or too wide, the sidewall shape changes, and that can affect rubbing, tread wear, and steering feel. Brand-to-brand specs can shift a bit as well, so the number on the sidewall is the starting point, not the whole story.

For a clean read on the letters and markings around the size code, BFGoodrich’s sidewall marking breakdown lays out what width, ratio, construction, and other markings mean.

What Usually Changes After A Swap

• Ground clearance: You gain about half the diameter increase under the axle.
• Speedometer reading: It may read a bit slow if the new tire is taller than stock.
• Gearing feel: Acceleration can feel softer with a taller, heavier tire.
• Clearance: Rubbing can show up at full turn or full compression.

Tire Size	Overall Diameter	Change Vs. 295/70R18
295/65R18	33.1 in	About 1.2 in shorter
285/75R18	34.8 in	About 0.5 in taller
305/70R18	34.8 in	About 0.6 in taller and wider
33×12.50R18	33.0 in	About 1.3 in shorter
35×12.50R18	35.0 in	About 0.7 in taller

Will A 295/70R18 Fit Your Truck?

That depends on three things more than anything else: the wheel width, the truck’s stock tire size, and the room around the tire at full turn and full bump. A lot of full-size trucks and heavy SUVs can take this size with the right wheel and offset. Some need a leveling kit. Some need trimming. Some can run it stock, though only by a hair.

Start with the wheel. Then check inside clearance near the upper control arm, frame, and sway bar. After that, check the outer side near the fender liner and mud flap. If you tow, haul, or run off-road, check clearance with the suspension loaded too. That’s where a setup that “fits in the driveway” can start to kiss plastic or metal.

Checks Worth Doing Before You Order

• Match the tire’s approved rim-width range to your wheel
• Compare overall diameter with your stock size
• Check load index and load range, not just size
• Ask for the brand’s measured section width on your wheel width
• Check spare-tire space if you want a full-size spare

Is It The Same As A 35-Inch Tire?

Not quite. A 295/70R18 is about 34.3 inches tall on paper, so it sits just under a true 35. That gap looks small, though it can still matter for gearing, speedometer math, garage clearance, and tight fitment. If you want the look of a 35 without landing on a full 35×12.50 tire, this size is one of the close options people lean toward.

One last thing: printed size and real mounted size are not always a perfect match. Tread design, casing shape, wheel width, air pressure, and load can nudge the final numbers. If your setup has tight clearances, use the maker’s spec sheet for the exact tire model before you buy.

The Number Most Drivers Want

If you only need the takeaway, this size works out to about 34.3 inches tall and 11.6 inches wide on an 18-inch wheel. That’s the clear mental picture to keep in your head when you compare it with stock sizes, 33s, and true 35s. It’s a tall, meaty truck tire that lands in a nice middle ground between daily livability and a fuller, tougher stance.