Westlake SU318 H/T
The Westlake SU318 HT is a budget highway-terrain all-season tire with low external noise and a low purchase price. Wet braking, comfort and rolling resistance are recurring weaknesses, and snow traction was poor in its highway-terrain comparison.
Independent tests find relatively quiet external pass-by noise, including the lowest measurement in the 2026 Tyre Reviews highway-terrain all-season test. Low price and a strong warranty-based cost-per-mile calculation helped it finish sixth of seven overall. That value calculation does not establish measured tread life. The dry-handling win was an unusual positive beside last place in dry handling in the 2021 SUV test, which used a different, summer-tire field.
Wet braking was last in both comparisons, with a 9.1% stopping deficit in 2026 and 34% in 2021. Aquaplaning resistance was also weak, and quiet external noise did not mean good impact comfort: subjective comfort was last in both tests. High rolling resistance is another repeated drawback. In the 2026 test it was also last in snow traction and dirt handling, so the all-season and highway-terrain descriptions should not be taken as evidence of strong winter or off-road grip. Its purchase price is easier to justify than its performance across those conditions.
The quick answer
Built from every independent test result and vetted owner review we hold for this tire - the evidence is all further down the page. Data updated April 2026.
- 2professional tests
All Tests
View Test ResultsTested 2 times by independent publications, the Westlake SU318 H/T averages a finish of 8th.
Best HT All Season Tires for 2026 Tested! P6 of 7
The Westlake SU318 HT was included as I thought it would highlight how bad cheap tires are, which it did to a point, but it was WAY better than I expected it to be. That said, it was still last overall in the wet, last overall in snow, last overall in dirt, the worst subjective comfort, the highest rolling resistance. But it was the fastest around the dry handling lap! The value result really helped not finish in last place overall, And honestly while it isn't a great tire, assuming it doesn't wear out very quickly, it does present a somewhat interesting value proposition.
| Year | Test | Result | Award |
|---|---|---|---|
| 2026 | Best HT All Season Tires for 2026 Tested!Tyre Reviews · 265/65 R18 | P6 / 7 | Tested by Tyre Reviews |
| 2021 | 2021 Tyre Reviews SUV Tire TestTyre Reviews · 235/55 R18 | P9 / 9 | Tested by Tyre Reviews |
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Videos
I Tested 7 Highway Tires in Wet, Dry, Snow & Dirt
8 of the BEST SUV Tires For 2021 - Tested and Rated
Running Costs
View TestIn 265/65 R18, the Westlake SU318 H/T is projected to cost $18.98 per 1,000 miles to buy and run - about $475 over 25,000 miles - based on its US price and the manufacturer's treadwear warranty, from the Best HT All Season Tires for 2026 Tested!.
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