got a set of boss 15" XTRs yesterday with falken 195/45 rubber, and although i knew the acceleratioon would be a bit worse i wasnt prepared for this! altough you 172 / willy boys are obviously a lot faster in comparison, on my standard rims i could feel the pull on the RT, espec. around the 3K+ mark. now it is definitely a lot slower accelerating - a few figures, i got 110mph on the motorway w/standars, this morning on the motorway i struggled to get to 90mph!
I reckon the tracking needs re-doing since it seems to pull slightly to the left, but is there anything else which would cause this loss of performance or is it just a side-effect? what is aligning? camber? sorry if this is basic, not too sure on this!!