Sumitomo ST778 Commercial
With Sumitomo's S-Tech technology, the ST778 is a premium steer axle tire that's engineered for long miles in line haul work. The ST778 features a flat footprint and an all-season tread, with grooves and microgrooves that direct water away to resist hydroplaning. Features & Benefits Wide footprint puts more rubber on the road to reduce uneven wear Designed for use on the steer axle of commercial trucks and buses Steel belted construction increases strength and durability Tread pattern allows for solid traction and performance year-round
NHTSA-reported issues for Sumitomo Sumitomo ST778 Commercial
Top issue category: Tires (General)
Most reported: Tires (General) (45) · Tread / Belt (16) · Sidewall (11) · Valve (8) · Bead (4)
Complaints are voluntarily submitted to the NHTSA Office of Defects Investigation and are not verified by NHTSA — they represent owner-reported problems, not proven defects. Counts can be useful as a relative quality signal across comparable tires or vehicles.
Specs
| Brand | Sumitomo |
|---|---|
| Model | Sumitomo ST778 Commercial |
| Season | winter |
| Type | truck-suv |
| UTQG treadwear | N/A |
| UTQG traction | N/A |
| UTQG temperature | N/A |
| Mileage warranty | N/A |
| Noise (dB) | N/A |
| Introduced | N/A |
Live prices
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Available sizes (0)
Size data being verified.
Sumitomo Sumitomo ST778 Commercial: what the numbers tell you
Manufacturer treadwear data for the Sumitomo ST778 Commercial is not publicly listed. This is common for OEM-only or track-day tires that don't carry a US treadwear warranty. No mileage warranty is published for this tire, which is typical for performance summer and track-day rubber where the manufacturer doesn't make wear-life claims.
Cabin noise data for this tire is not published by the manufacturer. As a winter tire built for the truck-suv segment, the Sumitomo ST778 Commercial is positioned against direct rivals within the same category. Comparing it to a tire in a different category (e.g. summer vs all-season) makes the spec sheet misleading because the design targets are not the same.
With Sumitomo's S-Tech technology, the ST778 is a premium steer axle tire that's engineered for long miles in line haul work. The ST778 features a flat footprint and an all-season tread, with grooves and microgrooves that direct water away to resist hydroplaning. Features & Benefits Wide footprint puts more rubber on the road to reduce uneven wear Designed for use on the steer axle of commercial trucks and buses Steel belted construction increases strength and durability Tread pattern allows for solid traction and performance year-round
For an apples-to-apples comparison against direct rivals, see the comparison pages linked from this tire's brand index.
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Last verified 2026-05-21.