The Losi pink tapers and the Evil twins (m2) seem to be the tire of choice for blue groove tracks, If your track allows them.They are borderline for height requirement and if you get tech'ed you are going to be close with a new set. some people use tape under the foam and it makes them a little bigger..The track I run in the winter only techs the tires on their big race days once a year, but let them slide all other times..Has anybody tried the panther switch tires? They look almost like taper pins, but they are designed for 1/8?? I heard that they are excellent for forward traction but they suck on the corners..