Summit Ultramax UHP AS Tire

Summit Ultramax UHP AS 245/40R18XL

4.8(256 store reviews)
$146.78 each
$587.12 set
or 4 interest-free payments of $146.78 Shop Pay Klarna Afterpay interest-free when paid on time
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Free Shipping US All orders
Fitment Guarantee Risk free
Package Options Save when you build a package
Authorized Dealer 100% brand new wheels
Category
Performance
Load index
971,609 lbs per tire
Speed rating
WUp to 168 mph
Know your tire

About the Summit Ultramax UHP AS

Everyday Performance. All-Season Confidence.

Best forPerformance-oriented passenger cars and sport sedans seeking dependable all-season grip, high-speed stability, and extended tread life in daily driving conditions.

The Summit Ultramax UHP AS delivers a confident, well-rounded driving experience suited to enthusiasts who demand year-round capability without sacrificing performance. With a W speed rating and UTQG traction grade of AA, this tire provides responsive steering feedback, stable high-speed cornering, and reliable braking. Whether paired with Cragar wheels through Summit Racing builds or American Racing wheel setups, it complements performance-oriented fitments with composed, predictable handling.

The Ultramax UHP AS features an all-season performance compound engineered to balance dry grip with wet-weather traction. Its asymmetric tread pattern channels water efficiently to reduce hydroplaning risk, while continuous center ribs support straight-line stability at speed. An impressive treadwear rating of 600 reflects a durable compound formulation designed to outlast many competing ultra-high performance tires, making it a practical choice for daily drivers who prioritize longevity alongside capability.

The numbers

Specifications

Size & Dimensions
Brand Summit
Tire Model Ultramax UHP AS
Part Number SMT1601665
Tire Size 245/40R18XL
Section Width 245
Aspect Ratio 40
Rim Diameter 18
Overall Diameter 25.71
Overall Width 9.65
Sidewall Black Side Wall
Performance
Speed Rating W
Load Index 97
Load Range XL
Max Inflation Pressure 50
Tread Depth 10
Ratings
UTQG 600AA
Tread Wear 600
Traction A
Temperature A
Mileage Warranty Manufacturer's Warranty
Category
Tire Type Performance, All Season
Good to know

Questions about this tire

What does 245/40R18XL 97W mean?

245 is the tread width in millimeters, 40 means the sidewall is 40% of that width, and R18 is the 18-inch rim it mounts on. 97 is the load index (1,609 lbs per tire), and W is the speed rating (up to 168 mph).

The brand

About Summit Wheels

Summit is a value-oriented wheels brand offering aftermarket alloy wheels primarily aimed at budget-conscious consumers and everyday drivers. The brand focuses on delivering functional, presentable wheel designs without the premium pricing associated with forged or luxury-tier manufacturers.

Shop all Summit 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.

Verified buyers

Owner Reviews