Re: [Chevelle-list] Tires

[Thomas Ringlein]

Title: Message

I hope this helps – I have had 15” wheels on my 1972 for over 12 years.  I have 1987 IROC wheels (15x8 with 4.5” backspacing – if memory serves) and have them mounted with 265 50R 15 BFG Radial T/A’s front and rear.  I have never experienced any rubbing anywhere, and the fat tires on all 4 corners looks awesome. When I rebuild, I am going with 17” American’s – 17x9.5 with 285’s in back, 17x8 with 245’s or 255’s in front.   TJ Ringlein (Rinky) Ramstein, Germany USAF 1972 Chevelle, in shambles   From: John Nasta [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 14, 2006 3:14 PM To: The Chevelle Mailing List Subject: Re: [Chevelle-list] Tires   It seems like it's only people with 15" wheels who talk about backspacing. I guess I will be dealing with this soon myself.   There is good info and a diagram here:   http://www.high-impact.net/wheels/howtomeasurebackspacing.htm   I'm still not clear on how maximum offset has anything to do with the height of the caliper from the center of the axle, while minimum offset has to do with the depth behind the rim. I also don’t know why If (I) x2 (times 2) is greater than 12.125" (G), obviously your maximum offset must be just under 4" or why G is measured on the outside of the wheel while the caliper is on the inside, but I have time to figure this out.   My '70 Malibu has 15s on the back now and when the air shocks are not pumped up they rub. Offhand I don’t know the tire size, which could be the cause of the problem. I suppose I'm going to have to see how she sits with new shocks and then decide what to do about tires and wheels.