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99 Seville STS
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31 Posts
Discussion Starter #1
I have a 99 sts and 2 of my 4 rims have bad leaks. I know someone who will sell me rims to replace them but Im not sure if they will work. Please if anyone knows respond. Thank you.

Currently I have stock 99 STS rims
235x60x16

Rims to purchase are stock wheels from a 2005 Cadillac CTS:
17x17.5
5x115
225x50x17 (mounted with those tires)

My biggest concerns are if they will rub and also that the 2005 CTS is rear wheel drive and my 99 STS is front wheel.

Thank you
 

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1997 Cadillac STS (BOSE w/AUX In, Massage Seats, URPAS, "Z")
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6,405 Posts
The only place where a rim is leaking is the interface between the tire and the rim. This can be EASILY fixed by taking the car to a tire shop and have the tires removed, clean the edge where the tire sits, apply the black adhesive stuff and mount the tire back. Also ask them to replace the valve (that’s another spot to have a leak). Should not cost more than $40 for the 2 wheels (at the most expensive tire shop).
 

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99 Seville STS
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31 Posts
Discussion Starter #3
Thanks. I have gone to 2 different shops and had them do exactly that but after a month or so they leak badly again. I just want to get rid of this headache and replace them.
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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71,046 Posts
Take a look at CTS wheels in www.wheelcollision.com, click on the image for a larger view, and find the H (Hollander) number for the wheels you want to buy. Come back.......

The Seville with 17x7.5 wheels takes a 235/55/17 tire.
 

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99 Seville STS
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31 Posts
Discussion Starter #5
These are the rims my friend has: 04-07 CTS H 4578 17x7.5 Thin 7 Spoke w Covered Lugs 17X7.5 POLISH OPTN N93
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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71,046 Posts
Those should work. Call WheelCollision and find out the offset - 40mm is the Seville 7.5" wheel spec - you'll be OK with 35 - 40.

Go to www.tirerack.com and look up the outside diameter spec for your OEM tire and that of the proper 235/55/17 tire. If the two are within 0.5" OD you're good to go (keeping the same or close OD introduces no speedo or transmission speed errors.)

Your tire has a 27" OD. The 235/55/17 has 27.2" Good to go.

The 225/50/17's are only 25.2", so gross speedo error and maybe enough wheel speed difference to throw codes and change shift points.
 

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99 Seville STS
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31 Posts
Discussion Starter #8
Ok so I have done a little research and came up with some answers.
Currently I have stock 16" Cadillac Rims (99 STS) with 235x60x16 tires with an outside diameter of 27

The new rims to purchase are 17" stock Cadillac rims from a 2005 CTS. They are mounted with Falken Ziex 512 tires that are 225x50x17 with an outside diameter of 26.1. These rims and tires are from a rear wheel drive caddillac and going on to my front wheel drive cadillac

With this information will they work on my car seamlessly without rub and speedo errors?

thank you again
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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71,046 Posts
See my post - three back. It says your tires have a 27" OD, while the recommended 235/55/17's have 27.2" Essentially no difference. (There's a typo in there: the 225/50's have an OD of 25.9, not 25.2")

If you stick with the 225/50's you will have some speedo error because of the 1" in OD difference. The new wheel/tire combination will need to roll X number of revolutions per mile more than your OEM wheel/tire, so you will wind up with a speedo that reads high.

Get rid of the Falkens and go to a good 235/55/17 tire.
 

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1995 Seville
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26 Posts
Verify the offset is correct, and the brakes clear the "new" wheels, if not they will rub the caliper or possibly not even bolt on.

For cracked wheels I have used Fix - a - Flat successfully on a 17" wheel on my Acura. It was a last ditch effort otherwise I was on my way to buying 4 new wheels. Wheel is cracked in 2 places and has held air for a month or so. It is worth a try for $4.00. Good luck!
 
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