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71 Riv Wheel Size Question

drody

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1971 Riviera
I have a 71 Riviera coupe, I believe with the original drum brakes in the rear and disc brakes in the front. I believe my wheel size is 15x6, but I would like to go to 15x7 if they would be compatible (there is plenty of room in the wheel wells). Do I need to do anything to make 15x7s fit? Looking to replace my old wheels with original/restored rally rims. Thanks very much.
 

2007LucerneCXL

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2007 Lucerne CXL. and 1995 Lesabre currently, past 1973 Riviera, 1968 Riviera
Ran 15×7 on the front and 15×8 on the back on my 1973 Riviera no issues. The only thing that I ever saw from that era of cars and wheels was that some wheels might hit the caliper on the very top, poor casting high point, but nothing with a little time and grinder couldn't take care of. If concerned dry fit without tire and give them a couple of spins to confirm clearances.

The only thing that I did was air shocks in the rear and spring loaded shocks in the front which got rid of that sort of bouncing feeling, was smooth and not mushy with that much weight.
 

drody

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1971 Riviera
Thanks very much. I have read a lot about the need for spacers with some different sized wheels, and didn't know if it applied in my case. 15x7 and 15x8 would probably look great! I will have to check the specs whether I've got that much room in the rear. Thanks again.
 

2007LucerneCXL

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2007 Lucerne CXL. and 1995 Lesabre currently, past 1973 Riviera, 1968 Riviera
It was some time ago, but they were Ansen Sprint running F60 on the front and G or L can't remember 60's on the rear just off the shelf stuff and no rubbing on the rears. If the tires sizes don't make sense it's because the new size system hadn't been invented yet LOL.
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LARRY70GS

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98 Riviera, 70 GS455 Stg1
The bigger Riviera Rally Wheels have the 5 X 5 bolt pattern. Most were 15 X 6, but some were 15 X 7. Here is a Rally Wheel Chart. The ones made from 80-87 were 15 X 7's. Look at the back spacing on the chart. The 15 X 7 has a 4 1/4" Backspacing. If you want to run a 15 X 8, just make sure it has 4 3/4" backspacing and the wheel will be centered in the wheel well.

WHEELCHART.jpg
 

drody

New member
6
0
1
Buick Ownership
1971 Riviera
The bigger Riviera Rally Wheels have the 5 X 5 bolt pattern. Most were 15 X 6, but some were 15 X 7. Here is a Rally Wheel Chart. The ones made from 80-87 were 15 X 7's. Look at the back spacing on the chart. The 15 X 7 has a 4 1/4" Backspacing. If you want to run a 15 X 8, just make sure it has 4 3/4" backspacing and the wheel will be centered in the wheel well.

View attachment 21389
Larry, thanks so much! I greatly appreciate it.
 

2007LucerneCXL

Full Member
3,875
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113
Illinois
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2007 Lucerne CXL. and 1995 Lesabre currently, past 1973 Riviera, 1968 Riviera
Not sure on this as the 1980 was FWD as the 1971-1973 were RWD, but V8buick forum had this post which might help.
bolt pattern 71 riviera
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