BMW specs 255 tires on 9" wheels. I also have 235 tires on the same wheels.
Paul L Fisher
Visit my website: http://www.paul-fisher.com
Amsoil dealer: http://www.paul-fisher.com/oil
-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of Ron Porter
Sent: Tuesday, July 25, 2006 3:09 PM
To: shotimes@autox.team.net
Subject: RE: [Shotimes] Thoughts on Kumho Ecsta 711s
Nope. I first learned this a few years back on the 911, when I went from the
245/45/16 on 16x8 rims (I bought it with that) to a 225/50/16 on those rims.
EVERYTHING improved.
Look at the specs for most 225 50 or 55 tires. Tread widths are around 8",
and the spec rim will be at least 7", with a 7-9" rim range.
An 8" rim is the best for a 225 tire from my experience, just as the 7.5"
rim is perfect for the 215/45 tires I run now.
As an example, a typical S tire is the ES100 Yoko, I either 225/50 or 225/55
size. Here's the Tire Rack specs:
225/50 WR16
92W SL 280 AA A
1389 lbs.
44 psi
10/32"
23 lbs.
6-8"
7"
8.9"
8.3"
25"
829
225/55 WR16
95W SL 280 AA A
1521 lbs.
44 psi
10/32"
24 lbs.
6-8"
7"
9.1"
8.3"
25.8"
805
The design spec rim is 7", but the tread width is 8.3", with a rim
recommendation of 6-8". I can tell you that the 225/55 does not work very
optimally on a 6" slicer. 7" is fine, but 8" is the optimal for handling.
Ron Porter
-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of FlamingTaco
Sent: Tuesday, July 25, 2006 3:43 PM
To: shotimes@autox.team.net
Subject: Re: [Shotimes] Thoughts on Kumho Ecsta 711s
I agree that actual rim use *may* vary as different tires or brands have
slightly different sidewall construction, but you can only put so much angle
into the sidewall before the tire stops supporting itself, and too little
increases NVH, so most tires in a given size tend to fall within the same
wheel width range.
Ron's numbers are a bit confusing to me, as most 225 tires lay up perfect on
7" rims. 8" tends to be great for 245 tires, unless he's talking about
something other than passenger car tires. Typo maybe?
David
-----Original Message-----
>From: van Oss <vanOss@centurytel.net>
>Sent: Jul 25, 2006 1:23 PM
>To: ronporter@ameritech.net, shotimes@autox.team.net
>Subject: Re: [Shotimes] Thoughts on Kumho Ecsta 711s
>
>I think the tire brand and design are also a factor. I have Kumho 712
>tires, 235 on 7.5" rims and the fit and handling seem excellent to me,
>sidewalls are just about exactly vertical.
>VO
>
>----- Original Message -----
>225 is just too wide for a 6" rim. 7.5" minimum, and 8" wide is best.
>Ron Porter
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>Shotimes@autox.team.net
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