Ride ! Almost as soon as you start lowering the 309 you hit trouble. If you stick to a 15mm offset and 195/45/16Ēs then youíre alright, as long as the carís not too low (i.e. about 35mm should be alright). 17ís are just not worth the bother. They will go on, but the outer lips on the arches will have to be that thin! The only way around this, is to dump the standard arches, put some nice rally arches on like the 309 above, and then you might have a chance.