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Old 07-13-2004, 11:34 PM   #1
gregr01
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Default just arrived -- SSR comps and Pirelli Asimmetricos

Just arrived from TireRack, 17x8.5 SSR Comps and 225/45/17 Pirelli PZero System Asimmetrico tires (shaved to 6/32nds).

Put 'em on the scale first thing... 33lbs per wheel/tire, compared with 40lbs per wheel/tire for the OEM 17x7.5 BBS with OEM 225 Bridgestone RE070 (tires worn to about 1/2 depth).

Mounted on the 8.5-inch wide SSR wheels, the 225 Pirelli tires are about one inch additional treadwidth, and about 1/2-inch taller.

With Eibach springs I'm not convinced these will never rub, especially on the track, but we'll see.

I needed a competition setup that would work for extremely hot track days (this is AZ, afterall), and still be decent for autox--and oh yeah, they had to be 140 tires to keep me in my regional class.

Quite a difficult assignment for a single set of tires. First autox with the new setup is this Sunday. Next track day isn't until Labor Day weekend, so I'll have them worn down to an more track friendly 4/32 by then.

gr.
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Old 07-14-2004, 11:03 PM   #2
TGITI
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Got any pix?
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Old 07-15-2004, 12:27 AM   #3
gregr01
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umm, a few mediocre shots... this won't be my daily driving setup (oem setup for that). They're just on for an upcoming autox.





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Old 07-15-2004, 12:58 PM   #4
Shaitiger
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Default Re: just arrived -- SSR comps and Pirelli Asimmetricos

Quote:
Originally posted by gregr01
Mounted on the 8.5-inch wide SSR wheels, the 225 Pirelli tires are about one inch additional treadwidth, and about 1/2-inch taller.
The tread width doesn't change if you go with a wider wheel. A 17x7.5 and a 17x8.5 wheel on a 225/45/17 tire will have the same exact thread width. The only thing that changes is the "section width" because the sidwalls are stretched to fit the wider wheel. That's also when you get that nice rounded off look.

Oh, and your tires should only be 0.3" taller than the stock RE070's. The RE070 overall diameter is 24.9" and the Pirelli Asimms are 25.2".

Did you actually measure them or did someone give you those numbers? It's possible that the Pirelli's are a wider 225 tire but not by 1 inch. That's 255/265 territory.

Last edited by Shaitiger; 07-15-2004 at 01:08 PM.
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Old 07-15-2004, 01:32 PM   #5
gregr01
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Treadwidth numbers are for basic "guidance" only. I used to manage a tire store's performance department and I saw a lot of variation back then. Still true today.

The numbers I stated are from physically comparing the treadwidth and height of the two tires. This Pirelli 225 tire is much larger than the OEM 225 Bridgestone tire.

I'll do a full measurement of both tires tonight: section width, treadwidth and o/a diameter.
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Old 07-15-2004, 11:07 PM   #6
gregr01
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fwiw...

Bridgestone RE070 225/45/17 (worn down to an average 7/32nds), mounted on 7.5" wide BBS OEM wheels:
overall diameter = 24.875"
section width = 8.875"
tread width = 8"

Pirelli PZero System Asimmetrico tires 225/45/17 (shaved to 6/32nds), mounted on 8.5" SSR wheels:
overall diameter = 25.25"
section width = 9.625"
tread width = 8.5"

difference:
o/d = +.375"
sw = +.75"
tw = +.5"

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Old 07-16-2004, 05:10 PM   #7
wrxman02
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all i can say is pimp.
sweet.
later
andy
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Old 08-02-2004, 12:32 AM   #8
mayo
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gregr01: Would you be willing to sell your oem rims and tires? I love those BBS rims and i also live in chandler so shipping wont be a problem. Please let me know.
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Old 08-02-2004, 01:38 AM   #9
kenchan
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nice!!
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Old 08-02-2004, 04:59 AM   #10
volkl23
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Thanks for the pics and measurements! How do the Asimmetricos compare to the RE070s?
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Old 08-02-2004, 10:51 AM   #11
gregr01
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Mayo: sent you an e-mail. Yes, I'll sell them.
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Old 08-02-2004, 11:01 AM   #12
gregr01
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volkl23: the Pirelli's grip seems about the same, although I've only done one autox on them and no track days, yet (Labor Day weekend will be the first).

Lateral g's are virtually identical (both tires are rated at 140 treadwear), according to my g-meter I get 1.07 peak and .98 steady-state cornering. The Pirelli's are much "quieter" in that they squeal/howl less during the autox, although this may be due to their being shaved.

Biggest difference is in the unsprung weight. I could feel the seven pound savings at each corner right away.

gr.
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Old 08-02-2004, 01:44 PM   #13
volkl23
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Thansk greg!
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