| ive got some treaded zhongya's and have to say they work pretty well. i think i got them up to temp for the first time on the weekend and they were very sticky. But if i was using them in a race they wouldnt last all that long. Only problem i have had is that i have a leak in both tyres. it may be my rims or maybe a punture but they hold the pressure over a race day but will be completely flat by the next day.
Definitely a great tyre for cags but i wouldnt use them with a W/C unless it was raining. | 
