Kingboss G866
WatchThe Kingboss G866 is a Ultra High Performance Summer tire designed to be fitted to Passenger Cars.
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Latest Tire Test Results
The BEST Performance Summer Tires for 2026 Tested!
8th/8
235/35 R19 • 2026
Very low rolling resistance and a decent subjective comfort score.
Worst in test for wet and dry braking and also last on both handling laps, with very low subjective handling scores.
Not much to say about the King Boss G866. If you're an enthusiast, do not fit this tire. Come to think of it, if you're a regular person, do not fit it either. It's just bad in the wet.
Alternative Tires
8.4/10
8.1/10
8.0/10
7.8/10
7.7/10
7.0/10
| Size | Fuel | Wet | Noise |
|---|---|---|---|
| 17 inch | |||
| 225/50R17 98 W XL | D | C | 72 |
| 215/45R17 91 W XL | D | C | 72 |
| 215/55R17 98 W XL | D | C | 72 |
| 225/45R17 94 W XL | D | C | 72 |
| 205/50R17 93 W XL | D | C | 72 |
| 18 inch | |||
| 225/40R18 92 W XL | D | C | 72 |
| 255/35R18 94 Y XL | D | C | 73 |
| 245/40R18 97 W XL | D | C | 72 |
| 255/35R18 94 Y XL | D | C | 73 |
| 245/45R18 100 W XL | D | C | 72 |
| 19 inch | |||
| 235/35R19 91 W XL | D | C | 72 |
| 20 inch | |||
| 275/55R20 117 W XL | D | C | 73 |
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