Hello...i wounder if any one can see if my springs are just old
(but still good suspension) i have not see any cut in the springs that have been lowered of somebody else,,, did this type of car comes with bigger rear tires orginal from fabricated?

Did 1979 oldsmobile delta 88 royale come with higher springs orginal? or is them like mine orginally? the tire size in front is 225/60/15"

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i found a pic on internet of a same car like mine...it have about same high front springs like my car

 

They look fine to me. All the Delta's seemed to have the slightly nose down attitude in 78/79. As long as the suspension is working fine and you're not routinely bottoming out, your springs are probably still in good shape.

The front/rear tires on the Delta and Ninety Eight were consistently the same from front to back. I had 215/75/15 front and 215/75/15 back on my 83 Ninety Eight.
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One of the reasons your ride looks like it has a wrong springs is the tire size. If you compare the aspect of 215/75/15 (688.5mm) to 225/60/16 (676.4mm)? Your wheels and tires will net -1.8% LESS in diameter than stock and will also result in a slight speedometer error.

 

good answer, thanks... so the 215/75/15" is the orginal wheel dim? i have 275/60/15" rear wheels,, the car is more on the nose down yes, maybe i should have a little bigger front tires or something..but i like the look on the car like it is now.

here in mine country we can have + - 5% wheel dim from the orginal wheel dim.

 

Olds offered 2 wheel/tire sizes for 79 Delta. 205/75/15 and 215/75/15. Either way you compare them, the 60 series you have will be slightly smaller OD. Even with that difference though you will be within the 5% you're allowed.

 

Aha ok, so then the 275/60/15 is almost close dim to the 215/75/15. i dont know what is the orginal backspace is on the orginal rims ..but i use this page to calkulate it.. looks ok between the orginal dim and the rear..

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The original tires could have been either 205/75-15 or 215/75-15. The 215/75-15s are 27.7" (703mm) in diameter. The 225/60-15s on the front are only 25.7" (651mm) in diameter - a full 2" (50mm) smaller than original, or a 7.5% difference in diameter (Allan, better check your math). THAT'S why they look funny.

By the way, the 275/60-15s are just about 28" in diameter, so while slightly larger than original, they are well within the 5% requirement.

 

Allan, he says he is running a 275/60/15. I think that tire would actually be a little taller than stock. Isn't the middle number the ratio of width to sidewall? If so, 275 mm x .60 = 165 mm whereas 215 mm x .75 = 161 mm. His tire should be 8 mm taller than stock. Unless I don't know what I'm talking about, which is entirely possible.

 

Alrighty, looks like everyone beat me to the punch.

 

hehehe :P ok to know that my rear tires is almost the stock dim then

maybe i could go up to 255/60/15" in front tires later if it`s clearence.

i use 8" rim in front with 4bs on 225/60/15" looks a little funny when i have big rear wheels but what ever

 

Either 255/60-15 or 235/70-15 will be virtually the same diameter as your current rear tires. The 255s might rub a little. I have the 235/70-15s on the front of my 84 Custom Cruiser (which is the same as your car from the front doors forward) on 15x7 zero-offset rims (that's about 3.75" backspace) with no fitment problems.

 

ok thanks for the tire tip, maybe 235/70/15 is a better option then.. i have a friend that soon shift out his rear 255/60/15 tires, maybe i can try them on my rims in front first.

but since my front tires are new i choose to use them first


EDIT: I found 225/70/15 tires on the tire shop, they are close to my rear tires (+2.2%) and the orginal dim (1.1%) ..i think i will go for that size in front next time if i choose bigger wheels in front

 

Ah, I just went and did. Apparently I plunked down the numbers for the 205/75/15 instead of the 215/75/15. That's why there was a discrepancy with your numbers. I do agree with your sizing - it works out the same for me.

Alan, actually he said he's running a 225/60/15.

FWIW, I ran 235/75/15 on my 83 Ninety Eight Regency Brougham and had no rubbing or clearance issues at all.

 

Sorry, I thought he was talking about the rear looking odd.