How Big Is a 315 70R17 Tire? Full Size Breakdown & Dimensions

A 315/70R17 tire measures about 34.36 inches tall, 12.40 inches wide, and has an 8.68-inch sidewall on a 17-inch rim. You get roughly 107.95 inches of circumference, which makes it a large truck and SUV tire with added ground clearance. It’s commonly used on lifted pickups and off-road builds, but you should still check wheelwell, suspension, and brake clearance. Keep going, and you’ll see how it compares with similar sizes.

Key Takeaways

• A 315/70R17 tire measures 34.36 inches tall, 12.40 inches wide, with a 17-inch rim diameter.
• Its sidewall height is 8.68 inches, giving it a larger profile than many common truck tires.
• The tire’s circumference is about 107.95 inches, which affects speedometer and gearing slightly.
• It fits many pickups and SUVs, but requires enough wheelwell, suspension, and brake clearance.
• Compared with similar sizes, it is close to 35-inch tires and offers strong off-road ground clearance.

315/70R17 Size Breakdown

The 315/70R17 tire size breaks down into a 315 mm section width, a 70% aspect ratio, and a 17-inch wheel diameter. You’re looking at a 315/70R17 tire that gives you about 221 mm, or 8.68 inches, of sidewall height, which supports load and absorbs impacts. Its section width is about 12.40 inches, so you get a broad contact patch for better traction and control. The overall diameter is roughly 34.36 inches, which adds ground clearance and helps keep your stance stable on rough terrain. This tire size fits many pickup trucks and SUVs built for capability. For proper fitment, you should match it to a rim width between 8.50 and 10.00 inches. When you choose the right wheel, you keep the tire size working as designed, preserving balance, handling, and the freedom to run hard surfaces with confidence and precision. Additionally, tires like the Pirelli Scorpion can enhance off-road performance while maintaining on-road comfort.

315/70R17 Dimensions in Inches

A 315/70R17 tire measures about 34.36 inches in overall diameter, 12.40 inches in section width, and 8.68 inches in sidewall height. Those 315/70R17 dimensions tell you exactly what space the tire claims on your rig. The overall diameter shows the full outside height, while the section width gives you the tire’s widest point from sidewall to sidewall. With a 70% aspect ratio, the sidewall height stays substantial, which can help you run with more confidence on rough ground. You also need a 17-inch rim diameter, so the tire matches your wheel size cleanly. If you care about performance math, the tire’s circumference is about 107.95 inches, which changes revolutions per mile and affects speed calculations. When you read these measurements in inches, you can judge fitment, clearance, and stance without guesswork. That’s practical knowledge, and it keeps you in control of your setup. Choosing the right tire type, such as all-terrain options, can enhance performance for various driving conditions.

What Vehicles Fit 315/70R17 Tires?

When you’re checking fitment, 315/70R17 tires are most commonly used on pickup trucks and SUVs that can handle a 34.36-inch overall diameter and 12.40-inch section width. You’ll usually see 315/70R17 setups on vehicles like the Toyota Tundra, Ford F-150, and Ram 1500, especially when you want stronger off-road performance and more ground clearance. These tire dimensions suit builds that already have enough suspension, wheelwell, and steering clearance for a 17-inch rim. If you’re upgrading your truck for tougher terrain, this size gives you a wider footprint for better grip and stability without sacrificing road control. You should verify lift height, wheel offset, and brake clearance before you commit. In practice, 315/70R17 tires work best on platforms built for larger rubber, so you can gain traction and confidence while keeping fitment precise and functional. Additionally, selecting all-terrain tires tailored to your vehicle can enhance your overall driving experience, especially in off-road conditions.

315/70R17 vs. Similar Tire Sizes

Compared with similar sizes, a 315/70R17 gives you a 34.36-inch diameter and 12.40-inch width that land it near several common alternatives. In tire size terms, it sits just above a 265/80R17, which measures 33.69 inches, so you get about 1.95% more diameter and a slightly taller stance. The 305/70R17 is even closer at 33.81 inches, only 0.98% smaller, while the 285/75R17 comes in at 33.83 inches, a -1.55% variance. If you want a more aggressive off-road option, the 35×12.50R17 reaches 35.03 inches, about 1.94% larger than the 315/70R17. These alternatives help you compare fitment, clearance, and gearing effects without guesswork. When you’re choosing, focus on how each diameter changes your clearance, not just the label. A direct comparison keeps your setup intentional and free from unnecessary compromise. Additionally, selecting the right tire can enhance traction in wet conditions, improving overall performance on varied terrains.

Best Uses for 315/70R17 Tires

315/70R17 tires work best on pickup trucks and SUVs where you need extra ground clearance, strong traction, and stable handling. Their 34.36-inch diameter lifts the chassis enough to clear rocks, ruts, and uneven trails, while the 12.40-inch width helps you keep control on loose dirt, gravel, and wet pavement. You’ll get solid off-road capability without giving up daily drivability.

These tires also suit winter conditions because the 3PMSF rating signals dependable grip on snow and ice. If you tow, haul tools, or run heavy-duty applications, the common 10-ply rating improves durability and load support. That makes 315/70R17 a practical choice when you want a tire that can work hard, adapt to changing terrain, and stay composed under pressure. Use them when you value capability, confidence, and freedom to go farther. Additionally, their aggressive tread design ensures maximum traction in diverse off-road conditions.

Frequently Asked Questions

Is a 315 70R17 a 35 Inch Tire?

No, you’re not mounting a true 35-inch tire; a 315/70R17 measures about 34.36 inches tall. You’ll get a wide 12.40-inch footprint, strong load capacity, and a tall sidewall aspect that helps off-road traction. Check rim compatibility before you buy, and match the tread pattern to your terrain. If you want freedom from guesswork, measure clearance first, because tire height can affect rubbing, gearing, and ride quality.

Are 315 Tires the Same as 33?

No, you’re not looking at the same size—315 tires aren’t equal to 33s. Like a bigger boot on the trail, a 315/70R17 brings a tire diameter comparison of about 34.36 inches, plus a taller sidewall height and more rubber under load. Your load capacity analysis, tread pattern differences, and off road performance all shift with that extra width and height, giving you more grip, clearance, and freedom to move.

Is a 315 Tire Equal to a 35?

Yes, you can call a 315 tire a 35, since its tire measurements put it near 34.4 inches overall. You’ll still want to check your aspect ratio, load capacity, and rim fit before assuming exact equivalence. For off road performance, tread patterns and actual clearance matter more than the label. You’re not locked into marketing terms; you can choose the setup that truly frees your build.

Is a 315 Tire the Same as a 37?

No, you won’t get a true 37 from a 315 tire. The Tire size is about 34.36 inches, not 37, and that Metric conversion matters when you’re choosing clearance. For Off road performance, a 37 gives you more height and usually better bite. Check Load capacity, rim fit, and Tread patterns too, because freedom on the trail depends on matching the tire to your terrain, not chasing a label.

Conclusion

In the end, a 315/70R17 tire gives you a tall, wide footprint that can boost traction and ground clearance without going overboard. You now know how it measures, what vehicles it suits, and how it compares to similar sizes. Think of it as a balanced upgrade, not a one-size-fits-all fix. If you match it to your wheel, suspension, and driving needs, you’ll get performance that fits like a glove, on-road and off-road.