You need to go to the original tire outside diameter in order to maintain correct speedo, engine and transmission calibrations. Rims that are too wide mount tires that will rub everywhere. If you lift the car you run the risk of messing up the suspension and ride height controls. Too bad that you have now ruined the body metal. Hopefully you used the correct 115 X 5 bolt pattern and about 45mm positive offset wheels or you now face hub/wheel bearing accelerated wear, and the assemblies are one-piece Timken units at about $100 a pop.

The original tire size is on the driver's door sticker. Get into www.tirerack.com and bounce the specs against a 20" tire for your car.

I think the original outside diameter for your car was 27", so with 16" wheels you had 5.5" of air and rubber between the wheel and the pavement. With the 20s, keeping proper outside diameter, you have only 3.5" of air/rubber between the wheel and road. Goodbye smooth ride and decent handling - goodbye.

Later Devilles had an 18" wheel option that you could have retrofitted with no problems whatsoever. Look through similar threads in this forum and down in Item Specific; Suspension, Tires, Brakes.

 

What size tires would be best on a set of 20s that would be the same size diameter? And fit without the rubbing.

 

If the rims are too wide or the offset is wrong, they'll always rub. What were they on before?

Assuming the rims fit, as posted, get into tire rack and compare some 20's to the OD of the stick tire.

 

I had them on a 97 Towncar before the Deville. And I'm pretty sure Tirerack.com won't have 20s as an option on this car. They are 255/45/20 Nitto NT555 tires. Stock I believe are 225s

 

You don't look up options for THAT car, you look up tire sizes manually. But don't bother. The offset for the Town Car is close to 0, and the Deville uses a high positive offset. Assuming the rim fit the Town Car correctly, it's not even close to fitting the Deville. The bolt pattern isn't correct either (114.3 - 115).

 

What do you mean offset? I'm new to this whole rim upgrade thing. They fit the towncar perfectly. And bolted onto the Deville fine too. Their universal rims so have several bolt patterns. Just have to try one or two before it slides on right. I see a lot of Devilles out there with 22s and bigger, how do they avoid that problem?

 

Wheel offset is the difference, in mm, between the wheel centerline and the hub face centerline. It determines wheel spacing in the well and also factors into wheel bearing life. Our cars use high positive offset - 43 to 50mm, while the Ford uses practically no offset. The wheels you have are grossly incorrect for your Cadillac.

Your bolt pattern is incorrect for the car - yours has a 115 X 5 pattern.

Our wheels index on the center bore, not on the bolt pattern.

As long as you maintain the correct outside tire diameter and don't get crazy with section or tread width you'll be OK. Your car/engine/transmission/speedo are calibrated for the original tire outside diameter of about 27". You can run ANY wheel diameter you like as long as you keep to the original tire outside diameter within about 0.3".

You need to get into www.tirerack.com and study their long list of wheel and tire FAQs. To put it all in this thread would take a long novel.

http://lmgtfy.com/?q=automobile+wheel+offset+and+tire+sizing&l=1

Please edit your profile to show correct info. It makes diagnosis and advice easier if a respondent can see what car you are asking about.

 

What rims would you recommend? I want as big of rims as possible lol. Like what should I look for?

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So .3" bigger is as big as I can go without rubbing?

 

So .3" bigger is as big as I can go without rubbing?

Outside tire diameter.

Please read the recommended study articles.

You can put any size wheel you want on the car - as long as it fits correctly (bolt pattern, offset, rim width) and you use the correct tire size.

Read post #2 again. The greater the rim diameter, the less air/rubber between the car and the pavement.

 

I tried looking it up through those sites but got somewhat lost. I would like to eventually move up to 22" wheels, which would definitely be bigger than .3" bigger. Its the width more than height that's an issue. The front is fine only rubs on bigger bumps at a good speed. The main issue is the back where the skirt covers about 1/3 of the wheel. Height wise it clears fine. Just rubs against the skirt.

 

The proper tire for a 22" wheel would not be greater in OD than a stock tire. You could run 27" rims if you wanted (no tires) and the calibrations would not change.

You can run 22s as long as you keep proper tire OD and don't get too wide in either section or tread width.

Kicker is, with a proper sized tire on a 22 you have only 2.5" of air/rubber between the wheel and pavement - the thing will ride like a tank.

 

The main issue is the back where the skirt covers about 1/3 of the wheel.

Because, as posted several times, the rims are the wrong size for the car They're too wide, and the offsetting WAY off. And, since the bolt pattern is incorrect, you're bending the hardened (read brittle) wheel studs when you tighten the lug nuts.

Sell the 20'scabd buy the CORRECT SIZE 22's.

 

So you guys have told me what bolt pattern and height to look for. What width rims should I look for? I couldn't figure it out using those links.

 

===============================
I certainly will NEVER see the attraction of destroying the ride of a Cadillac -
with dumb-looking oversize wheels - and rubber-band tires -

that said -

if you really want 22" wheels - they must be 8.5" wide -
and the correct offset - around 40mm -

the CORRECT tire size would be 225/30/22 -
this is as close as you will get to the original size 225/60/16 -

about 3/4 of an inch taller - and the same width -
so - mounted on the correct wheel -
they will NOT rub -

--------------

the 235/30/22 is an easier size tire to find - more choices -
the problem with this size is that it is almost an inch taller -
AND almost a half inch wider -

if your suspension sags just a little -
or your struts and shocks are alittle worn -
you might rub on bumps and/or turns -

 

OEM tire size for 2000-2005 VIN Y is 225/60/16. And Vine 9 is 235/55/17. I'm not good at this calculation stuff, but I'm guessing it would be 225/35/R20. BUT, I have a GREAT idea!!! Call a local shop that sells rims, and tell them that the biggest tire oem was a 235/55/17, and that you want to put 20 on it but still be able to turn and go over bumps without rubbing. They will be able to tell you more than we can. Most of us on this forum have kept our 16 & 17 inch rims. The blind leading the blind on this topic. So call a shop and ask one of them.

 

Thank you. The last two reply to my post were very helpful. That's what I was asking the whole time lol. Very simply put thank you.

 

======================

WHY does a 100 year old guy - without a car - or a home - need 22's?

 

What?

 

What?

Please read the Administrator note in your Post #1. Your login banner and profile is a mess because you never filled it out completely. The Profile and Settings tabs - top right ^^^

 

No I live in Lincoln, Nebraska and am 22. I just made the account for advice on my phone. Can't edit my profile through the app. I drive a 96 Deville. White with a blue top.

 

======================
I'll make a note of that -

96 Deville -
Lincoln, Nebraska -
22 -

 

????

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Would these tires clear fine?

http://simpletire.com/national-225-...eBRC1ndXgnuvx8JYBEiQAq4RPt07o6IDBck49c9WY8OykkHD8q6J0kL2E0gAJaBdsdgIaAsMI8P8HAQ

 

????

----------

Would these tires clear fine?

http://simpletire.com/national-225-...eBRC1ndXgnuvx8JYBEiQAq4RPt07o6IDBck49c9WY8OykkHD8q6J0kL2E0gAJaBdsdgIaAsMI8P8HAQ

=======================
I thought you wanted 22's?

YES - you could - 225/35/20 is actually 1/2 inch SHORTER than the original -

in fact - if you go to 20's - a better/BEST size would be 235/35/20 -

 

For the 20" rims? The rims don't fit the car.

 

But the 20" rims he currently has stick out way too far (near zero offset) and have the wrong bolt pattern.

 

-------------------------
I'm ASSUMING he's getting different wheels -
at least I HOPE he is -

if NOT - you are 100% CORRECT -
there is absolutely NO tire that will work on THOSE wheels - on THAT car -

 

I have 20s right now. They do fit on the bolts. I am seeing if there's anyway possible to GET them to fit under the rear fender skirt. Height wise they fit fine they only rub on big bumps up front. My issue is they are wide in the back. Like maybe 1/3 of an inch too wide. I am open to extending fenders or whatever. I would like to upgrade to 22s eventually. And am expecting the same issue. What size should I look for. In catalogs I see like 20 x 9.5 etc. What width would fit? Than I see the offset thing plus 30. Plus 40. Plus 45. I don't understand that.

 

As posted several times now, the rims DO NOT FIT. You can't roll the fenders, they're not round and the trim would still be in the way. The wheels fit over the studs, but the BOLT PATTERN IS INCORRECT. Again, as posted, when the lugs are tightened, the hardened (brittle) studs are going to be bent slightly. Snapping studs is a real possibility.

The best advice we can give is get rims that fit the car.

 

Okay so again. As posted. What size should I look for. I keep asking the same question but not getting nearly the answer I need. If you were to walk in a store. Right now. Buy 20s or 22s either one. To buy rims. For a 96 Deville. What size would you ask for?

----------

Rims and tire sizes both please. That's all I've been wanting to know.

----------

And what makes you say the bolt pattern is wrong. They are universal.

 

Okay so again. As posted. What size should I look for. I keep asking the same question but not getting nearly the answer I need. If you were to walk in a store. Right now. Buy 20s or 22s either one. To buy rims. For a 96 Deville. What size would you ask for?

----------

Rims and tire sizes both please. That's all I've been wanting to know.

----------

And what makes you say the bolt pattern is wrong. They are universal.

-----------------------------------
Rims and tire sizes both please.
That's all I've been wanting to know.
DID YOU EVEN READ WHAT I POSTED? -:banghead::banghead::banghead::banghead::banghead::banghead::banghead::banghead::banghead::banghead:

I already supplied you with all the information -
for BOTH 20's AND 22's -

wheel size - offset - and optimum tire sizes -

go back to post #16

 

No, there's no such thing as a "universal" bolt pattern. There are rims with multiple bolt patterns on them, but if the one you're using was correct for the Lincoln (114.3), it's incorrect for the Deville (115).

You need a relatively narrow 20 with a high positive offset (stock rims are 42mm). I believe basscatt posted the correct 20" tire size on the previous page.

----------

Oops, basscatt beat me.

 

So what width rim though. Like how it says 22x9.5 I'm wondering what the 9.5 is and how that factors in. And if tires are different for different widths. And than in this catalog I just picked up from the local shop say like +35 or +45 and says it like its an option. And would ANY other rim be the same bolt pattern cause in the catalog it says 4,5,6 as bolt patterns available. If I tell them 5 bolt will there be a TYPE of 5 bolt I have to ask for specifically or what?

----------

And what does offset do vs rim width make differences. I don't know I apologize for going in circles. I'm just trying to learn as much as I can.

 

The widest stock rim is the commercial chassis/limo rim. It's 8 inches wide. 9.5 is probably pushing it. If try to find a 9.

4/5/6 lug pattern are the number of studs. You have 5, and yes, there are different 5 lug patterns. Yours are 5 X 115 (114.3 is NOT the same, or "close enough").

Offset is the distance between the hub mating surface and the front of the rim. There is an illustration earlier in the thread that will make it easier to understand, but a 0 offset means the mating surface is dead center between the front and rear of the rim. A positive offset is closer to the front, and a negative offset is more toward the rear of the rim.