Back Spacing question on Rally 14" SBP rims

Hey Everyone
Thanks for all the info you have given me but I am still a little confused ..........What I am trying to accomplish is to have a little wider tire on the rear of my 68 dart gt.......... right now I have P205/70R14 tires on a set of Rally 14" SBP rims which I assume have the factory back spacing. On all the tire charts I see, I can't run a set of P225/70R14 tires on a 5.5 inch rim as it is to narrow. As mentioned above in other posts - I have found two company's that sell a 6 inch wide Rally rimw/ SBP which would work with the 225/70R14 tire but I don't know what back space I should have - I currently have from the inside of the current tire - 205/70r14 about 1 1/2 inches to the leaf spring and about 1 3/4 inch from the sidewall to the inner 1/4 lip on the wheelwell - I can't cut the lip on the 1/4 panel because I have chrome wheel opening moldings to put on the car. My question is:

When a rim has a higher number on the back spacing, does that mean the rim will stick out closer to the 1/4 panel lip OR will it stick out closer to the leaf spring?

This is not a race car - simply a cruse night car and tooling around town car - no plans to race as it has a 318 V8 !

Thank you very much everyone !

Mike

the higher the back spacing the closer to the leaf

I have 235/60/14 on the rear of my 72 dart with original 5.5" wide rally wheels.....No problem

You should be safe with up to a 4" back space. I have 4 1/4" on my 15x7's and 255/60's without rubbing issues but it it close. Those 6'' wide wheels aren't really enough to even notice compared to the 5.5's. I agree with bbrroowwnn. The 225's will work on the 5.5's just fine.

doug 371 said:

the higher the back spacing the closer to the leaf

Click to expand...

X2

Thank you very much guys ! I think I just solved my problem with all of your help- I'll just go with a wider tire and not mess with the rim width !

thanks again !

Mike

I run 245/60/14 B.F Goodrich radial T/As on the rear of my '69 Dart on 14x5.5 inch factory rallye wheels (small bolt pattern) with no issues.

I ran 225 70's 0n my '72 Swinger w/ Factory rallye wheels, Had ample clearance