Advanta RTX-850 Tire

Advanta RTX-850 37x12.50R20LT

4.8(257 store reviews)
$392.51 each
$1,570.04 set
or 4 interest-free payments of $392.51 Shop Pay Klarna Afterpay interest-free when paid on time
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Category
All-Terrain
Winter rating
3PMSFSevere snow certified
Load index
1283,968 lbs per tire
Speed rating
QUp to 99 mph
Know your tire

About the Advanta RTX-850

Serious Off-Road Capability, Certified for Winter.

Best forLight truck, SUV, and Jeep owners who regularly drive mixed on- and off-road terrain and need certified severe-snow capability during winter months.

The Advanta RTX-850 is an all-terrain tire built for light trucks, SUVs, and Jeeps that need to handle both paved roads and rugged off-road conditions. Carrying Three-Peak Mountain Snowflake certification, it goes beyond a typical all-season by meeting recognized standards for severe-snow service — making it a strong choice for drivers who face genuine winter weather alongside everyday driving.

The RTX-850 uses a symmetrical tread pattern featuring trapezoidal claw-shaped blocks with jagged outer edges to bite into mud, loose dirt, and icy surfaces. Stone ejectors built into the grooves push out debris before it can work its way into the tread and cause damage. Together, these elements support confident on-road stability and capable off-road traction, backed by Three-Peak Mountain Snowflake certification for severe-snow conditions.

The numbers

Specifications

Size & Dimensions
Brand Advanta
Tire Model RTX-850
Part Number ADV4326
Tire Size 37x12.50R20LT
Section Width 37
Aspect Ratio 12.5
Rim Diameter 20
Overall Diameter 37
Overall Width 12.5
Sidewall Black Side Wall
Performance
Speed Rating Q
Load Index 128
Load Range F
Ply Rating 12
Max Inflation Pressure 80
Ratings
Mileage Warranty Manufacturer's Warranty
Category
Tire Type All Terrain, All Season
Good to know

Questions about this tire

What does 37x12.50R20LT 128Q mean?

37 is the tread width in millimeters, 12.5 means the sidewall is 12.5% of that width, and R20 is the 20-inch rim it mounts on. 128 is the load index (3,968 lbs per tire), and Q is the speed rating (up to 99 mph).

Is the RTX-850 a true all-terrain tire or just an aggressive-looking highway tire?

It is a genuine all-terrain tire with a tread design — including claw-shaped blocks, jagged edges, and stone ejectors — intended for use on dirt, mud, gravel, and rough surfaces, not just pavement. That said, like any all-terrain, it balances off-road capability with everyday road manners rather than prioritizing one extreme.

What does the Three-Peak Mountain Snowflake certification mean for this tire?

The 3PMS symbol means the RTX-850 has passed an industry-standard test confirming it meets minimum traction requirements in severe snow conditions. This sets it apart from a standard all-season tire, which carries no such certification. It does not mean the RTX-850 replaces a dedicated winter tire in the most extreme ice or deep-snow situations, but it offers meaningfully better snow performance than a non-certified all-terrain.

What vehicles is the RTX-850 designed to fit?

The tire is built for light trucks, SUVs, and Jeeps. With 26 sizes available across 17- to 22-inch rim diameters, it covers a broad range of popular truck and SUV fitments.

Does the RTX-850 come with a mileage warranty?

This model is covered under the manufacturer's standard warranty rather than a specific mileage guarantee. We recommend confirming current warranty terms with us at the time of purchase.

How noisy is the RTX-850 on the highway compared to a street-oriented tire?

Like most all-terrain tires, the RTX-850's aggressive tread pattern will produce more road noise on pavement than a highway or touring tire would. The symmetrical tread design helps manage noise and wear, but shoppers who spend the majority of their time on highways and prioritize a quiet ride may want to weigh that trade-off before purchasing.

The brand

About Advanta

Advanta High Performance Car Tires feature a 40,000-mile limited treadwear warranty.

Shop all Advanta tires →

Vehicle Compatibility

Buying from TFS Wheels

Shipping, returns & guarantees

Authorized Dealer — 100% Brand New Wheels & Tires

TFS Wheels is an authorized dealer for every brand we carry. Every wheel and tire we ship is brand new, unused, and packaged in its original manufacturer's box. We never sell refurbished, demo, or return-stock product. All manufacturer warranties apply and our warehouse is staffed by people who only handle wheels and tires — no in-transit damage, no test-fits, no surprises.

Free Shipping (Lower 48)

Free shipping on every order — wheels, tires, and accessories — to the contiguous United States. No minimum order, no hidden fees.

Standard delivery is 4–7 business days; expedited is 1–4 business days. Orders placed before 1:00 PM ET typically ship the same day. We do not ship internationally or to PO boxes.

Fitment Guarantee

If a wheel or tire marked "Direct Fit" or "Aftermarket Fit" for your vehicle arrives and does not fit as expected, we cover both the restocking fee and return shipping. The same applies if the bolt pattern does not match — provided your vehicle information was submitted at checkout.

To qualify for the guarantee, enter your year, make, model, and submodel before placing the order.

Manufacturer's Warranty

Every wheel and tire is covered by the full manufacturer's warranty against defects in materials and workmanship. Coverage terms vary by brand — most cover structural integrity for the life of the wheel and finish for 1 to 2 years from purchase. If you ever have a warranty question, contact us first; we work directly with the manufacturer on your behalf so you don't have to.

Accessories Included with Your Order

When you submit your vehicle information at checkout, the right lug nuts and (if needed) hub-centric rings are automatically added to your cart in the correct sizes — no guessing, no separate ordering.

TPMS sensors are also available in the cart. We program each sensor to your vehicle's exact year, make, model, and submodel before shipping, so they arrive ready to sync with your truck or car the moment they're installed. This typically saves customers the dealer or installer's programming fees, which often run several dozen dollars per wheel.

Returns

Returns are accepted within 30 days of purchase on items in new, unused condition. A 25% restocking fee applies to general (change-of-mind) returns, and the buyer covers return shipping.

The restocking fee and return shipping are waived for incorrect items, transit damage, or fitment issues when vehicle information was provided at checkout. Single wheels, single tires, mounted items, special orders, and accessories (lug nuts, locks, hub-centric rings, TPMS sensors, installation kits) are final sale.

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Owner Reviews

What Happens After You Order

A specialist checks your fitment by hand before anything ships.