How Much Do All Terrain Tires Affect Gas Mileage? | MPG Drop

All-terrain tires often cut fuel economy by 1 to 4 mpg, with the biggest drop showing up on heavier vehicles and at highway speed.

All-terrain tires almost always cost some fuel economy. The reason is simple: they ask the engine to push a heavier, chunkier tire down the road. That extra grip is great on gravel, dirt, ruts, and sloppy weather. On pavement, it usually means more drag, more rolling resistance, and more weight to spin.

For many drivers, the drop is small enough to live with. For others, it adds up fast. A midsize SUV that loses 2 mpg across a year of commuting can burn a lot more fuel than the same vehicle on lighter highway tires. The bigger the vehicle, the taller the tire, and the more aggressive the tread, the easier it is to spot the difference at the pump.

So the honest answer is not one fixed number. A mild all-terrain tire in the stock size may only trim mileage a little. A heavier, load-range E, mud-leaning all-terrain tire in a larger size can take a much bigger bite. If you want one clean rule, think in low single-digit mpg loss, then adjust up or down based on your setup.

How Much Do All Terrain Tires Affect Gas Mileage? Real-world Numbers

Most drivers land in a range of about 3% to 10% worse fuel economy after switching from road-focused tires to all-terrain tires. On a vehicle that usually gets 20 mpg, that can mean ending up around 18 to 19 mpg with a mild all-terrain, or lower if the tire is larger and heavier than stock.

That range widens once tire size changes. A same-size all-terrain tire mainly hurts mileage through tread design, rolling resistance, and weight. An upsized tire adds more losses from extra rotating mass, changed gearing, and more wind drag if the truck also sits higher. That’s why two people can buy “all-terrain tires” and report numbers that are nowhere near each other.

Why The Drop Happens

Three things do most of the damage:

• Heavier construction: More weight takes more energy every time you pull away from a stop.
• Blockier tread: Bigger tread blocks flex more and waste more energy as heat.
• Higher rolling resistance: The tire resists motion more than a smoother road tire.

Federal fuel-economy sources point to the same physics. NHTSA says a 10% drop in rolling resistance can bring about a 1% to 2% gain in fuel economy. Flip that the other way and it becomes clear why a more aggressive tire can drag mileage down.

Where Drivers Notice It Most

You feel the fuel hit most in a few spots:

• Highway cruising, where tread pattern and weight keep working against you mile after mile.
• Stop-and-go driving, where heavier tires need more energy to get rolling again.
• Cold weather, when tire pressure drops and rolling resistance climbs.
• Vehicles that already struggle with mpg, like body-on-frame SUVs and pickups.

If your driving is mostly city errands at modest speed, the change may feel manageable. If you rack up long freeway miles every week, the extra fuel burn is a lot harder to ignore.

Factor	What Changes	What It Usually Does To Mileage
Stock-size mild all-terrain	Small jump in tread depth and weight	Usually a modest mpg drop
Aggressive all-terrain tread	Larger tread blocks and more squirm	Raises fuel use more on pavement
Upsized tire diameter	More rotating mass and altered gearing	Can turn a small loss into a clear one
Wider tire width	More contact patch and drag	Often trims highway mpg
Higher load range	Stiffer, heavier carcass	Common on trucks that lose more mpg
Low tire pressure	More sidewall flex and heat buildup	Pushes mileage down fast
Cold weather	Pressure drops as air cools	Makes an all-terrain setup feel worse
Lifted vehicle	More wind drag on top of tire loss	Stacks another penalty onto mpg

When The Mpg Loss Stays On The Lower End

You can keep the hit closer to the low end if you choose your tire with restraint. A road-biased all-terrain tire in the factory size is the sweet spot for most people who want a tougher look and some trail ability without wrecking daily fuel cost. These tires still trade some mpg for grip, but they skip the worst penalties that come with oversized, extra-heavy rubber.

Pressure matters too. According to FuelEconomy.gov’s tire pressure guidance, proper inflation can lift gas mileage by 0.6% on average and by as much as 3% in some cases. That matters even more on all-terrain tires, since a soft tire already starts behind a highway tire on rolling resistance.

There’s also a difference between “all-terrain” and “all-terrain-looking.” Some newer designs are built to stay civil on pavement. They pack the center tread more tightly, keep weight in check, and cut some of the wandering feel older all-terrain tires were known for. If your truck spends most of its time on asphalt, those details are worth chasing.

Ways To Cut The Fuel Penalty

You don’t need to give up on all-terrain tires to save some fuel. You just need to avoid stacking every mileage killer at once.

• Stay with the stock size if you can. The size jump often hurts as much as the tread change.
• Watch tire weight before you buy. A few pounds per corner adds up.
• Choose a road-friendlier all-terrain pattern. You still get dirt-road grip without the full penalty of a near-mud tire.
• Check pressure often. NHTSA notes on low rolling resistance tires and tire care tie tire design and condition to fuel economy.
• Fix alignment issues fast. A bad alignment can chew through fuel and the tire at the same time.
• Pull off extra weight. Roof baskets, bed racks, recovery gear, and full-time cargo all work against mpg.

One more thing: judge your mileage by hand for a few tanks after the swap. Tire size changes can throw off the speedometer and trip computer, so the dash number may not tell the whole story. A simple miles-driven and gallons-filled check gives you a cleaner answer.

Setup	Usual Fuel Hit	What You Get Back
Highway tire, stock size	Baseline	Best pavement mpg
Mild all-terrain, stock size	Small drop	Better gravel and weather grip
Aggressive all-terrain, stock size	Moderate drop	More bite on loose ground
Mild all-terrain, upsized	Moderate drop	Ground clearance and tougher stance
Aggressive all-terrain, upsized	Larger drop	Stronger off-pavement traction
Heavy-duty all-terrain, low pressure	Largest drop	Little upside for daily road use

One wrinkle catches a lot of drivers off guard: brand-new tires can post worse mileage for a while even when the size stays the same. Fresh tread is deeper, the casing is stiffer, and the tire needs a little time on the road before it settles in. If you check fuel use right after installation, don’t be shocked if the first tank looks rough. Give it a few normal driving cycles, then compare numbers again. That gives you a truer read on what the tire is doing.

Should You Buy All-terrain Tires If You Care About Fuel Cost?

If you need the extra grip, stronger sidewalls, or dirt-road confidence, the mpg trade can be worth it. A tire that handles the roads you actually drive is worth more than a perfect lab number you never get to enjoy. The problem starts when drivers buy more tire than their use case calls for. A daily commuter that sees gravel twice a month usually doesn’t need the heaviest, most aggressive all-terrain tire on the rack.

That’s the clean takeaway: yes, all-terrain tires affect gas mileage, and the effect is real. Still, it doesn’t have to be brutal. Keep the size close to stock, avoid extra-heavy designs, stay on top of pressure, and pick a tread pattern that matches your real driving. Do that, and you can get the tougher traction you want without turning every fuel stop into a groan.