305/55R20 tires
Prices, best picks and current deals for 305/55R20, a common size on pickup trucks. It fits the Ford F-250, Ram 2500, Toyota Tundra and more.
Yes, this fits your Toyota Tundra. 305/55R20 is the original size on the 2007-2021 Toyota Tundra.
The sticker inside the driver's door is still the final word, because trim and wheel package can change the size. Back to every Toyota Tundra size.
What 305/55R20 tires cost
Milestar Patagonia X/T
Lowest price that still brakes and wears acceptably. Fine for a second car or low annual mileage.
Listed as Milestar Patagonia X/T 305/55R20 125/122Q Rugged Terrain Light Truck Tires
Toyo Open Country A/T III
The value sweet spot: long mileage warranty, solid wet grip, sane price.
Listed as Toyo Open Country A/T III 305/55R20 116S All Terrain Off-Road Light Truck Tires
Nitto Ridge Grappler
The strongest wet and snow braking and the longest tread life among what is stocked in this size. Worth it if you keep the car.
Listed as Nitto Ridge Grappler 305/55R20 125/122Q Rugged Terrain Light Truck Tires
Prices are per tire, before mounting and balancing. A set of four in the mid range comes to roughly $960 to $1,476, and a brand rebate can take another $50 to $110 off, see this month's deals.
Cheapest 305/55R20 right now
American Roadstar R/T 305/55R20 116T Rugged Terrain Light Truck Tires
$183.07per tire $366.14 for 2 tires · $732.28 for 4
135 tires in this size, priced straight from SimpleTire's own product feed, read 13 November 2026. Stock and prices move daily, so check the shop for today's figure.
See every 305/55R20 tire in stock at SimpleTire
About the 305/55R20 size
Wide 33 in aftermarket size (33.2 x 12.5 in), LT load range D/E. Needs 9-10 in wide wheels; M/T and R/T tread dominate.
What the numbers on the sidewall mean
A 305/55R20 tire is 305 millimeters wide, its sidewall is 55 percent of that (about 6.6 inches tall), and it mounts on a 20-inch wheel. That works out to an overall diameter of roughly 33.2 inches. Every replacement has to match all three numbers, and the load index and speed rating on the placard inside the driver's door have to be met or exceeded.
In this size our picks are marked 125/122Q on the Milestar Patagonia X/T and Nitto Ridge Grappler (3,638 lb per tire as a single, 3,307 lb in a dual fitment, rated to 99 mph) and 116S on the Toyo Open Country A/T III (2,756 lb per tire, rated to 112 mph). The first number is the load index, the letter the speed rating; a tire with equal or higher values than your placard is fine, a lower one is not.
Our guide on reading a tire size walks through the markings, and this one lists every load index and speed code.
Our three picks, side by side
One tire at each price level from what the retailer stocks in this size, with the mileage warranty and UTQG grades as published by the manufacturers and their retailers. Treadwear is the number to compare: it is a relative wear rate, so 700 should last roughly twice as long as 350 on the same car.
| Milestar Patagonia X/T | Toyo Open Country A/T III | Nitto Ridge Grappler | |
|---|---|---|---|
| Price per tire (Nov 13, 2026) | $272.96 | $463.02 | $507 |
| Set of four | $1,091.84 | $1,852.08 | $2,028 |
| Service description in 305/55R20 | 125/122Q | 116S | 125/122Q |
| Mileage warranty | see listing | 65,000 mi P-metric; 50,000 mi LT and flotation sizes | no mileage warranty; workmanship warranty, pro rata to 2/32" |
| UTQG treadwear / traction / temperature | see listing | see listing | 500 A B (typical, varies by size) |
| Season | see listing | All-terrain | Rugged-terrain |
| Extras | — | — | — |
What 305/55R20 tires cost across the whole range
Of the 179 tires listed in this size, 135 are in stock today. The lowest price is the American Roadstar R/T at $183.07, a 116T tire. The median is $276.56; a third of the tires cost $239.99 or less, and the top five percent start above $526.17. Those are per-tire prices before mounting and balancing, which adds $15 to $45 per tire at most shops, read from the retailer's feed Nov 13, 2026.
The same tires in neighboring sizes
The Milestar Patagonia X/T, our budget pick here at $272.96, is also stocked in 35x12.50R17 ($228.99). The Toyo Open Country A/T III, our mid-range pick here at $463.02, is also stocked in LT285/75R17 ($359.38), 33x12.50R22 ($517.79), 285/55R20 ($342.98) and 37x12.50R20 ($549.06). The Nitto Ridge Grappler, our premium pick here at $507, is also stocked in LT285/75R17 ($353), 275/55R20 ($297), 33x12.50R22 ($501) and 37x12.50R20 ($542). Useful if your vehicle came with a different wheel package, or if you are comparing an upsize: the same tire usually costs more per inch of wheel, not per inch of rubber. Prices per tire, from the retailer's feed Nov 13, 2026.
Winter on a pickup in this size
Four-wheel-drive pickups satisfy Colorado's Passenger Vehicle Traction Law on the 126 miles of I-70 between Dotsero and Morrison, in force from September 1 to May 31, on the vehicle alone, provided the tires have at least 3/16 inch of tread. A two-wheel-drive truck, still common in work trims, must be on tires marked M+S, 3PMSF or rated all-weather by the manufacturer. Fines start at $130. Nearly every all-terrain tire carries the M+S marking, and the better ones now also carry the 3PMSF symbol, which requires a tested level of snow traction rather than just a tread pattern. An unloaded pickup is light over its rear axle, so on snow the rear tires lose grip first; a few hundred pounds of ballast in the bed over the axle does as much as the tire choice.
Of our picks in this size, the Toyo Open Country A/T III carries the 3PMSF symbol; the Nitto Ridge Grappler does not.
Vehicles that use 305/55R20
- Ford F-250 (2005-2024, 33 in upsize)
- Ram 2500 (2010-2024, upsize)
- Toyota Tundra (2007-2021, lifted upsize)
Other years and wheel packages of the same models came on LT245/70R17, LT265/70R17 or LT285/75R17 instead, so read the placard inside the driver's door before you order.
Which type of 305/55R20 tire?
All-Terrain Tires
Pickup, Jeep and SUV owners who tow, drive gravel or dirt roads, or need real traction in snow and mud.
Mud-Terrain Tires
Off-road enthusiasts with lifted trucks or Jeeps that see mud, sand and rock regularly.
Highway Truck & SUV Tires
Pickup and SUV owners who commute, haul the family or tow on pavement and want quiet, long tread life and good fuel economy.
Frequently asked questions
How much do 305/55R20 tires cost?
Expect $183–$240 per tire for a budget brand, $240–$369 for a mid-range tire like the Toyo Open Country A/T III, and $369–$526 for a premium tire like the Nitto Ridge Grappler. A set of four therefore starts at about $732. Add roughly $15 to $45 per tire for mounting and balancing.
What vehicles use 305/55R20 tires?
305/55R20 is original equipment on Ford F-250 (2005-2024, 33 in upsize), Ram 2500 (2010-2024, upsize) and Toyota Tundra (2007-2021, lifted upsize), among others. Always confirm with the sticker inside your driver's door, because trim levels and wheel packages can change the size.
What is the best 305/55R20 tire?
For most drivers our mid-range pick, the Toyo Open Country A/T III, is the sweet spot of price and tread life. If you keep the vehicle a long time or drive in heavy rain and snow, the Nitto Ridge Grappler is worth the extra. On a tight budget the Milestar Patagonia X/T is a sound choice.
Can I replace just one or two 305/55R20 tires?
On a front- or rear-wheel-drive car, yes: replace in pairs on the same axle and put the newer pair on the rear. On all-wheel-drive vehicles most makers want all four replaced together, or a new tire shaved to match, because a difference in circumference strains the drivetrain.