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37x13.50R20 Tires for Lifted Trucks in Tampa, FL

37x13.50R20 is the maximum-presence one-ton diesel size and the most photogenic tire in the modern lifted truck world. At 37 inches tall and 13.5 inches wide on a 20-inch wheel, it requires a 4 to 6 inch suspension lift, 20x12 wheels with deeply negative offset (typically -44 to -51), and almost always some inner fender liner and bumper trimming. It's effectively the home tire of the lifted Ram 2500 Cummins, Ford F-250 Powerstroke, and Silverado 2500HD Duramax community. Brand selection in this size skews aggressive: Toyo Open Country M/T and BFG KM3 dominate the dedicated mud-terrain crowd, Nitto Ridge Grappler and Toyo R/T own the hybrid market, Mickey Thompson Baja MTZP3 and Nitto Trail Grappler cover the more extreme M/T patterns. Most options are load range E (10-ply) with some F (12-ply) for heavy-tow applications, and weights typically run 80-92 pounds per tire. The size is rarely run on half-ton trucks because the lift height, wheel offset, and trimming required pushes builds well past the point where a 35-inch tire makes more sense.

37″ Overall Diameter
13.5″ Section Width
20″ Wheel Rim
4-6 inch suspension lift on HD trucks Lift Needed
$430–$760 Per Tire

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Will 37x13.50R20 fit my truck?

The maximum-stance one-ton diesel size. Wider than a 37x12.50R20 by a full inch of tread width, with more visual presence and slightly better float on sand. Almost exclusive to Super Duty and Ram HD trucks running 6-inch lifts and 20x12 wheels with deep negative offset.

Common fitments

  • Ford F-250/F-350 Super Duty with 4-6 inch lift
  • Ram 2500/3500 with 4-6 inch lift
  • Chevy Silverado 2500HD/3500HD with 4-6 inch lift
  • Ford F-150 (rare, requires 6 inch lift, regear, and bumper trim)
  • Ram 1500 TRX (factory size on TRX is 35; 37 with lift)

37x13.50R20s show up at every Tampa truck show and on every serious local diesel build. On Anclote sand or Hutchinson Island access, the extra inch of tread width over a 12.50 floats noticeably better aired down. On Tampa I-275, they're loud, heavy, and hard on front-end components. This is a size for owners who built the truck on purpose and accept the daily-driver compromises.

Not sure if it fits?

Bring your truck by — we'll measure your wheel offset, check fender clearance at full lock, and confirm before any tire is mounted. No surprise rubbing.

Book a fitment check Call (813) 464-9023

Top brands in 37x13.50R20

Names lifted-truck owners actually pick. Live stock from our PartsTech dealer network.

  • Nitto Ridge Grappler
  • Toyo Open Country M/T
  • Toyo Open Country R/T
  • BFGoodrich Mud-Terrain T/A KM3
  • Mickey Thompson Baja MTZP3
  • Nitto Trail Grappler M/T

Tread profiles available in 37x13.50R20

Pick a tread style that matches how you actually drive — daily commute, weekend trails, or full-time mud.

  • Mud-Terrain (M/T)
  • Hybrid Rugged-Terrain (R/T)
  • All-Terrain (A/T)

37x13.50R20 questions, answered straight

The questions we get most often from Tampa truck owners shopping this size.

What lift do I need for 37x13.50R20?
On a Ram 2500 or F-250, a 4 inch lift with 20x12 -44 offset wheels and trimmed inner fender liners will clear 37x13.50R20. A 6 inch long-arm lift gives you more room for full articulation off-road without rub. On a half-ton truck, 37x13.50R20 is essentially impossible without a 6+ inch lift, regearing, bumper trimming, and pinch-weld work; even then, fitment is tight.
Why pick 37x13.50R20 over 37x12.50R20?
Three reasons: width (13.5 inches vs 12.5 inches gives a more aggressive look and slightly better sand flotation), wheel pairing (the 13.50 looks proportional on a 20x12 wheel where the 12.50 looks slightly tucked), and shoulder block size (the wider tire has bigger shoulder lugs on most M/T patterns, which matters for rock crawling). The trade-offs are weight (about 5 pounds more per tire), price (typically $30-50 more per tire), and rub potential (much more likely to rub the bumper and fender).
What wheel offset do I need for 37x13.50R20?
Almost always a 20x12 wheel with -44 to -51 offset on a Ram 2500 or F-250 with 4-6 inch lift. That's a deeply negative offset wheel that pokes the tire well outside the fender flare. Some builders run 20x10 -24 offset which is closer to flush, but most 37x13.50R20 builds intentionally run the wider wheel for the look.
Is 37x13.50R20 too much tire for daily driving?
It depends on your starting truck and tolerance. On a Ram 2500 Cummins or F-250 Powerstroke with stock 3.73 gears, a 6 inch lift, and a regear to 4.10, the daily drive is harsh but tolerable. On a half-ton or non-regeared HD truck, daily driving 37x13.50R20s is genuinely punishing on bearings, ball joints, and the driver's patience. Most owners running this size daily replace tie rod ends and ball joints every 35,000-50,000 miles.
How much do 37x13.50R20s cost installed?
Plan on $1,800-3,000 for the tires alone in load range E or F. Toyo Open Country M/T runs $620-720 each, Nitto Ridge Grappler $530-630, BFG KM3 $580-680, Mickey Thompson Baja MTZP3 $450-550. Add roughly $200-350 for mounting, balancing (these need road-force balancing because of the weight), TPMS, and valve stems. A matching spare adds $450-720, and you'll usually need a swing-out bumper or bed-mounted carrier to hold one.

Sizes close to 37x13.50R20

Going up a size for more sidewall? Down a size to clear a smaller lift? Compare options.

Ready to mount 37x13.50R20?

Book installation at our Tampa shop — most tire installs take 60–90 minutes, mounted and balanced on the same day.

Schedule Installation Call (813) 464-9023

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