The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Need 15" x 10" Rally Rim & Tire Sizing Help

1986swb · 10-02-2008, 08:28 PM

Sorry if this is a redundant thread but after searching the forum, I could not find the answers to my questions applicable to my 1986 GMC Fleetside SWB, with stock ride height and using 15" x 10" rear rallies:

What is the most effective (without scraping or rubbing inner and outer fenders) back spacing rim size AND maximum tire size combination for my 86 SWB?

1. Back space = 4.5" ? Max. tire size?
2. Back space = 5.0" ? Max. tire size?

My SWB currently sports the 15" x 8" rallies on 255-70s, with 4.5" back spacing. See pic.

Thanks guys. Your recommendations and expertise are greatly appreciated.

10-02-2008, 08:28 PM	#1
1986swb Registered User Join Date: Mar 2008 Location: Sammamish, Washington Posts: 163	Need 15" x 10" Rally Rim & Tire Sizing Help Sorry if this is a redundant thread but after searching the forum, I could not find the answers to my questions applicable to my 1986 GMC Fleetside SWB, with stock ride height and using 15" x 10" rear rallies: What is the most effective (without scraping or rubbing inner and outer fenders) back spacing rim size AND maximum tire size combination for my 86 SWB? 1. Back space = 4.5" ? Max. tire size? 2. Back space = 5.0" ? Max. tire size? My SWB currently sports the 15" x 8" rallies on 255-70s, with 4.5" back spacing. See pic. Thanks guys. Your recommendations and expertise are greatly appreciated. Attached Images