I currently race the PC-Vane True-Speed wheels with the complete setup of precisionspacers and axles in 7mm. Runs like a dream with a set of SKF race bearings. The funny thing is that I started them out indoor on a wooden floor, where my Hyper Stripes couldn't get any grip at all, but the Truespeed gave me lots of grip. Both are 85A in durometer, so PC-Vane probably has worked out the better compound. I was thinking about buying the Boosters for wet conditions, because the Stripes are excellent on a semi-wet surface. Anything better for rainy races?