The only true directional tire (for 1/10 scale buggy at least) is the BroCodes. The 1/10 Truck BarCodes can be mounted directionally (as a tuning aid) as one side has a large Y and one has a small Y. Other than that....I haven't seen any problems with either Truck or Buggy Gold compound tires. The buggy BarCodes (v2's) you can mount them so that one set of the Y's is ahead of the other side of the tire. Are both L/R sides mounted so that the inside or out side are the same (outer sidewall has the Y ahead of the inner sidewall or vice versa), I dont know if this would cause an issue like you have stated, just trying to think of something.