305/40R20 tires
Prices, best picks and current deals for 305/40R20, a common size on SUVs. It fits the BMW X5, BMW X6 and more.
Yes, this fits your BMW X6. 305/40R20 is the original size on the rear axle on the 2020-2024 BMW X6.
The sticker inside the driver's door is still the final word, because trim and wheel package can change the size. Back to every BMW X6 size.
What 305/40R20 tires cost
Atturo AZ810
Lowest price that still brakes and wears acceptably. Fine for a second car or low annual mileage.
Listed as Atturo AZ810 305/40R20 112Y All Weather Passenger Tires
Yokohama Avid GT
The value sweet spot: long mileage warranty, solid wet grip, sane price.
Listed as Yokohama Avid GT 305/40R20 112V All Season Passenger Tires
Michelin Pilot Sport 4 SUV
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.
Prices are per tire, before mounting and balancing. A set of four in the mid range comes to roughly $1,928 to $2,292, and a brand rebate can take another $50 to $110 off, see this month's deals.
Cheapest 305/40R20 right now
Atturo AZ810 305/40R20 112Y All Weather Passenger Tires
$164.96per tire $329.92 for 2 tires (one axle)
13 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 305/40R20 tire in stock at SimpleTire
About the 305/40R20 size
Rear half of the staggered 20 in BMW SUV setup (275/45R20 front). Star-marked run-flats were common from the factory.
What the numbers on the sidewall mean
A 305/40R20 tire is 305 millimeters wide, its sidewall is 40 percent of that (about 4.8 inches tall), and it mounts on a 20-inch wheel. That works out to an overall diameter of roughly 29.6 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 112Y on the Atturo AZ810 (2,469 lb per tire, rated to 186 mph) and 112V on the Yokohama Avid GT (2,469 lb per tire, rated to 149 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.
What 305/40R20 tires cost across the whole range
Of the 17 tires listed in this size, 13 are in stock today. The lowest price is the Atturo AZ810 at $164.96, a 112Y tire. The median is $508.99; a third of the tires cost $481.99 or less, and the top five percent start above $649. 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 Atturo AZ810, our budget pick here at $164.96, is also stocked in 255/50R19 ($131.96), 245/35R21 ($137.96), 255/55R19 ($135.96) and 275/45R21 ($171.08). 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 an SUV in this size
Most SUVs in this size are all-wheel drive or four-wheel drive, which is enough to 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, as long as the tires have at least 3/16 inch of tread. A two-wheel-drive version must instead be on tires marked M+S, 3PMSF or rated all-weather by the manufacturer. Fines start at $130. Four driven wheels help you pull away, not stop: a heavy SUV on worn all-seasons needs much more road to brake on snow than the same vehicle on a tire with the 3PMSF symbol, so in the snow belt choose the tire, not just the drivetrain.
Vehicles that use 305/40R20
- BMW X5 (2019-2024, 20 in rear)
- BMW X6 (2020-2024, 20 in rear)
Other years and wheel packages of the same models came on 255/50R19, 255/55R18 or 275/40R20 instead, so read the placard inside the driver's door before you order.
Which type of 305/40R20 tire?
All-Season Tires
Drivers in the South, West Coast and mild parts of the Midwest who want one set of tires that lasts a long time and is quiet.
All-Terrain Tires
Pickup, Jeep and SUV owners who tow, drive gravel or dirt roads, or need real traction in snow and mud.
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 305/40R20 tires cost?
Expect $165–$482 per tire for a budget brand, $482–$573 for a mid-range tire like the Yokohama Avid GT, and $573–$649 for a premium tire like the Michelin Pilot Sport 4 SUV. A set of four therefore starts at about $660. Add roughly $15 to $45 per tire for mounting and balancing.
What vehicles use 305/40R20 tires?
305/40R20 is original equipment on BMW X5 (2019-2024, 20 in rear) and BMW X6 (2020-2024, 20 in rear), 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 305/40R20 tire?
For most drivers our mid-range pick, the Yokohama Avid GT, 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 Michelin Pilot Sport 4 SUV is worth the extra. On a tight budget the Atturo AZ810 is a sound choice.
Can I replace just one or two 305/40R20 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.