AO Gold Member
Join Date: Apr 2002
Re: Recommended tyre size for 7.5 x 17 alloys
Standard Alfa 7x17" wheels have an offset of 40mm.
7.5 x 17" GTV Teledials have an offset of 30mm and I think the Siennas are either 35 or 30mm.
30mm offset could be too far out and cause the rear tyres to catch the wheel arch, 40mm are a bit too far in for 225/45 tyres and these tend to catch the inner front suspension where it curves up over the tyre.
I think the GTV uses a longer wheel bolt than the 156 but I'm not sure if this is due to the wheel design or some spacer that is fitted.
156 2.5 V6 24v, Cosmos Blue Metallic, Tan Leather, 17” GTA's, 225/45 Michelin PS2's, Full Zender body kit, GTA Headlights, Eibach springs, Koni FSD's, Eibach Anti-roll bars, Ferrari 360 Brembo calipers, DS2500 pads, Squadra ECU, 45mm Intake Runners, Carbon Intake, Dan & Wizard exhaust
156 2.5 V6 Qsystem, Red + Red Leather, Bilstein dampers, DS2500 pads...soon Brembo calipers, 17" GTV Teles