BFGoodrich Tyres: 35" to 40" for Built American Trucks

A lift kit is only half the job. The tyres are what actually put a built truck on the ground, and on a heavy American pickup they have to carry the weight, tow the load and still get you through the rough stuff. That's why our BFGoodrich range starts at 35 inches and goes all the way up to 40.

Every tyre here is a light-truck (LT) construction, road-legal tyre from BFGoodrich's two proven off-road lines: the All-Terrain T/A KO3 and the Mud-Terrain T/A KM3. No passenger sizes, no 33s. Just the sizes that suit a lifted RAM, Silverado, Sierra, F-Series or Tundra.

All-Terrain T/A KO3: The Do-Everything Tyre

The KO3 is the third generation of the most famous all-terrain tyre there is. It's the one to pick if your truck does a bit of everything: towing the van, highway kilometres during the week, and gravel, sand and dirt on the weekend.

• CoreGard sidewall technology comes from BFGoodrich's Baja desert-racing tyres, with split and bruise-resistant rubber and extended shoulder coverage.
• Advanced Deflection Design helps push sticks and stones away before they snag and split the sidewall.
• Full-depth 3D locking sipes keep the tread stable and wearing evenly for the life of the tyre.
• Serrated shoulders and mud-phobic bars improve grip in mud and soft ground over the old KO2.

Mud-Terrain T/A KM3: Built for the Hard Stuff

The KM3 is for trucks that spend serious time off the bitumen: rock, mud, steep climbs and beach runs. It gives up a little on-road refinement for a lot more grip when the track turns nasty.

• Krawl-TEK compound grips rock and slick surfaces.
• Linear Flex Zone lets the tyre flex and wrap around obstacles when you air down.
• Terrain-Attack tread uses big tread blocks and mud-phobic bars to clear packed mud and keep biting.
• CoreGard Max sidewalls add a thicker shield to guard against cuts, punctures and splitting.

KO3 or KM3?

Go KO3 if your truck tows, tours or drives on the road most days. It's quieter, wears longer and still handles more off-road than most people will ever ask of it.

Go KM3 if you're regularly in mud, rock or deep sand, or you air down to crawl. It's the stronger off-road tyre and the more aggressive look.

Sizes We Stock

The metric sizes (like LT295/65R20) all measure close to 35 inches tall, so they fit the same lift and wheel setups as a 35x12.50.

39" and 40" sizes are available to order. They aren't always on the shelf, so call the team for availability and lead times before you plan your build around them.

Before You Fit 35s or Bigger

Going up in tyre size changes more than the look. Check these before you order:

• Load rating. Heavy-duty trucks, especially ones that tow, need a load range E or F tyre. Check the load index on each tyre against your truck's tyre placard.
• Clearance. Most trucks need a lift or levelling kit, and sometimes different wheel offset, to run 35s or 37s without rubbing. 39s and 40s generally need a big lift and often trimming.
• Your state's rules. Each state limits how far you can go up in tyre size, and how that combines with a lift, before engineering is needed.
• Speedo and gearing. Bigger tyres will make your speedo read low, and 37s and up can affect how a truck tows and brakes.

Not sure what fits? Call the team on 07 5500 0095 and we'll match the right tyre to your truck, your lift kit and your wheels.