Rear wheels and tires 5x4

[gumper]

I'm tired of my stock style steel wheels and think I may drop some time off my ETs by switching to all aluminum. Right now I'm running 28x9.00x15 M/T slicks on the 15x8 wheel vintique OEMs plus a 1/4" billet spacer. They have a 4.625 backspace, and I was considering centerline convo pros with 4.5 backspace and trying to squeeze 28x10.50 in there. Previously I was running 275/60/15 M/T ET street radials with no rubbing on the OEMs. Also using cal-trac springs. Think this will fit?

 

[604B1duster]

I have 15x7.5 small bolt convo's with 275 60s on a 70 dart. The backspace is 5 inch, but I have a 1/2 inch spacer to keep the tire off the spring. Was going to use offset shackles and loose the spacers. That would be close to perfect on a dart. Switching to bigbolt, mini tub and may be selling convo's, 15x4 fronts also. Tires are shot.

 

[gumper]

I think 15x7.5 would be too narrow for 10.5 slicks. 8 is pushing it, but I know the 15x10 won't fit. May look into offset shackles but I'd rather not.