i was looking at getting these wheels, http://www.summitracing.com/parts/CRR-3977835P/, for my 2003 supercrew 2wd. Is 5 in. backspacing too much because i've heard stuff saying anything more than 4.5 will rub? They have the same wheel on there also but it is 16x7... not 16x8 like i was trying to get. Will this make a big difference? BTW they are going on 305/70r16 tires.

Thanks!

 

They will fit and work fine.