I have a 2000 s10 blazer and want to get new rims and tires. Im lookin at Proline Style 139 Rims in15x7
http://www.pepboys.com/tires_wheels/...chined_wheels/
And 30x9.5x15 Bfg Mud-Terrain T/A KM2
http://www.samsclub.com/shopping/nav...=5&item=436242

but here is my problem. i have no idea wht the backspacing is on the rims and even if i knew that i would need someone to tell me if those rims with those tires would fit. please help!

Thanks in advance for ur responses.