I searched the archives and couldn't find a definite answer. So here it is. The 360 wheel fits on a 348 TS/TB with no modifications (mine is a 1991). You can use your original 348 wheel bolts and NO spacers are needed. In fact the wheel acts as a spacer, it pushes out the front wheel 17.5 mm's and the rear 41.7mm (inclusive of the extra inch in width of the new rim). So to sum 1. Original wheel bolts used (no need for new ones). 2. No spacers needed to make wheel fit. 3. Wheels fit as if you were to put 17.5mm spacer on front with 348 wheel. 4. Wheels fit as if you were to put 41.7mm spacer on rear with 348 wheel. 5. Wheel does not rub on lip of fender ( I do not track my car so I don't know what characteristics it would produce being driven very hard.