Right from Losi`s site .
Silver: An excellent all-around tire compound. Silver compound tires work best in situations where the Red compound tires provide too much grip. You will commonly use Silver front tires to help desensitize the front end and take steering away.
Red: Red compound tires are widely used on hard-packed outdoor racetracks. Losis red compound tires provide exceptional bite and tread life. The Red compound is softer than the Silver compound, yet slightly firmer than White.
White: Tires molded from the White compound rubber will have increased grip when compared to the same tire in a Red or Silver compound. If you are searching for more grip on one or both ends of your vehicle, a White compound tire will yield more traction.
Pink: Pink compound tires are the hot ticket when racing on tacky indoor tracks that have a lot of traction. If youre racing on a track that calls for a low-profile pin, give the pink compound a try.
Blue: Designed to handle the rigors of 1/8-scale nitro racing, blue compound tires provide a competitive advantage to nitro fanatics.
surface application ty