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- Dry4.0 out of 5
- Wet4.0 out of 5
- Winter4.0 out of 5
- Comfort4.0 out of 5
- Noise4.0 out of 5
- Treadwear4.0 out of 5
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.