I race an STRR, when they revised from the R to the RR they extended the chassis and extended the hubs by 14mm (which equals the 1/2 offset). When I raced MT and Truggy at the same time I converted my hubs back to standard so I could run the same tire on both trucks which was the 1/2 offs. When I switch back and forth on hubs I can't tell the difference in mass. I have standard, 9mm, 11mm and 14mm but always seem to run the 14's. I don't think you will have a problem either way you go.