Cadillac Owners Forum banner

1 - 12 of 12 Posts

·
Registered
1999 Eldorado ETC-sold for 2006 GTO
Joined
·
120 Posts
Discussion Starter #1
Hey, I want to get rims for my 99 ETC, but I'm not sure of the tire size with 20s. I know for 18s its 245/45/18, does anyone know what 20s would be? Thanks in advance.
-Chris
 

·
Banned
1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
Joined
·
7,971 Posts
215/40/20 or 245/35/20 are the closest you're going to get to stock tire height...

285/30/20 would be close but impossible to actually do, would get great traction though.
 

·
Registered
Joined
·
86 Posts
deftonez99 said:
the proper tire size would be 255/35/20

i have a set of 20's for sale if you are interested
My son is running on 245/35/20 Falkens and they matched perfectly with the stock 225/60/16's. You can also step up to a 255/35/20 and it would still be pretty close and would fit very nice and just a slight bit taller than stock.
 

·
Registered
Joined
·
161 Posts
chris203 said:
Hey, I want to get rims for my 99 ETC, but I'm not sure of the tire size with 20s. I know for 18s its 245/45/18, does anyone know what 20s would be? Thanks in advance.
-Chris
I believe the OEM tire size for your Eldo was P235/60/16, correct?

If so, the overall tire and rim height for that setup would be 27.235"

Using that number for speedometer calibration, here are some quick #'s...

P255/35/20 = 27.112" overall tire and rim height
P235/40/20 = 27.490" overall tire and rim height
P225/40/20 = 27.171" overall tire and rim height

I think any of these would work well for you since the total height is +/- .25". The P225/40/20 is only .064" short of OEM specs. If anything your speedo would read slightly slow, but I doubt it would be noticeable. I'd use these sizes as a starting point to see which will be the most economical choice for your rim width. They might not all be available or in production, so having some options should help.
 

·
Registered
Joined
·
97 Posts
They are some U2 Rims, with sumotumo tires. I bought them brand new, and have had them on my car for 4 months. But living in Wisconsin summer comes and goes very fast so i need to get rid of them before the winter. Give me you email address and i will send you some pics.
 

·
Registered
Joined
·
66 Posts
The most common size that you will find for cars is a 255/35/20. Second would be a 245/40/20. I just ordered the BFG KDWs for my 99 STS (245/40/20). I was going to buy the Falken Azenis ST-115, but was told the BFG was a better wet traction tire (I live in Seattle). I have the same tires on my Lincoln and I am happy with them so I don't expect any surprises.

Kale
 

·
Banned
1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
Joined
·
7,971 Posts
sjwoodruff said:
I believe the OEM tire size for your Eldo was P235/60/16, correct?
225/60/16 was stock on my 95 and on 98s, I wouldn't think they changed it for 99.
 

·
Registered
1999 Eldorado ETC-sold for 2006 GTO
Joined
·
120 Posts
Discussion Starter #10
Yea, my stock tire size is 225/60/16. I've been looking on CarDomain and stuff to see what other people have put on their Eldos. The most common sizes I have seen is 245/35/20 or 255/35/20. Tire Rack recommends 245/35/20, but I'm gettin the rims Tuesday and will probably goto the tire shop on Friday and see what they say for tire size. I want to get the 255s more so than the 245s so the car can handle a little better than with the skinny (for this size of car) stock tire size it has.
 

·
Registered
Joined
·
161 Posts
I guess they went to the 235/60/16 in 2000 then, not '99. Whichever year they went to the monochromatic paint scheme and seven spoke wheel on ETC's should've been when the tire size widened.
 

·
Registered
1999 Eldorado ETC-sold for 2006 GTO
Joined
·
120 Posts
Discussion Starter #12
Hey, jus got the rims today, I went to the tire shop so they can order the tires. The size they recommended and that I got were 245/35/20s. I got Nitto 555s. I'll be sure to post pics when I get them on.
 
1 - 12 of 12 Posts
Top