11-05-2015, 06:44 AM | #1 |
Drives: One of the baddest handling Gen 5s Join Date: Feb 2011
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285-35-19s Pirelli Trofeo R
Just saw these 285-35-19s on Tire Rack and am thinking of using these on all 4 corners on 19x10.5" Apex wheels I have next year for track only wheels. What do you guys think.I have the street Pirelli P Zero 285-35-19 on my car now and it is as wide as the Bridgestone RE-11 305-30-19 but a bit taller. Also realize that Pirelli Trofeo Rs actually have wider threadwidth than advertise. http://www.tirerack.com/tires/tires....TRXL&tab=Specs.
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11-05-2015, 09:11 AM | #2 |
corner barstool sitter
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I think it'd work rather well. Especially up front, where the first comparison that comes to mind is having an 0.8" narrower size than what the Z/28 wears, mounted on a wheel only 0.5" narrower.
I'm hoping to get up to Thompson or Palmer next year, but damn, you're not even going to let me see your taillights for more than a couple of corners with this. Norm
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11-05-2015, 09:51 AM | #3 | |
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11-06-2015, 12:26 PM | #4 | |
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Quote:
I have a 2010 SS/rs Camaro, and I would like to use the Apex wheels for track days as well. Their web site shows that they can only be used on a BMW that has 12 BY 1.5 threaded wheel studs. Did you have to en-large the clearance holes in the Apex wheels, to use them with the 14 mm. wheel studs on the Camaro? Also, if you did, what did you use to enlarge them? Also, did the 22mm. offset on the 19 BY 10.5 wheels work well on the front & rear as well? Thank You so much for your help. All The Best, Orange 2010 Camaro |
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11-06-2015, 05:48 PM | #5 |
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11-08-2015, 05:18 AM | #6 |
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I did use APEX ARC-8 19"x10.5" ET22 at the track using 305/30/19 Hankook RS-3s ($220/tire at the time due to close-out) with no issues on Z/28 suspension, which is almost 1" lower than stock if I recall correctly. APEX wheels are very well made, and work pretty good on our cars. That said, they will stick out a bit, especially at the rear, so I'd highly recommend using either protective film on the sides of the body, or using fender flares.
With flares: Without flares: Rear/front Side Front
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11-08-2015, 09:56 AM | #7 | |
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11-15-2015, 11:10 AM | #8 | |
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11-18-2015, 09:34 PM | #9 |
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Hoosiers and Trofeo R are not that far apart, just so you know. I came very close to trying out Hoosiers on my car, but I just can't get over the fact that their load rating is severely below what is needed for our cars, despite Hoosier itself stating we can compensate that using higher pressures (40+ PSI COLD).
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11-19-2015, 06:52 AM | #10 |
corner barstool sitter
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Hoosier is giving you good information that most people never find out about - you can use different Load Index tires as long as the mew pressure required to match the OE load @ pressure does not exceed the load table pressure limits for the new tire (XL = 42 psi, SL = 36 psi, unfortunately I haven't found the LL load vs inflation table yet). Obviously this does not necessarily correlate with the "max psi" labelling on the tire.
Whether you'd really want to run 40 psi cold is a whole 'nother matter. Norm
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11-19-2015, 07:14 AM | #11 | |
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Considering all this hassle, and the fact that Trofeo Rs can be acquired for cheap, at least until Z/28 sales (and their take-offs) dry out, I could not justify trying Hoosiers. Now I have a different issue: I do have 3 sets of Trofeo Rs and a set of MPSC 2 tires, and I should use them by next year, since some of those tires are from '14 Z/28s, and the rubber is getting old in my garage.
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12-31-2015, 09:24 PM | #12 | |
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Last edited by L99CAMA2011; 12-31-2015 at 09:45 PM. |
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01-01-2016, 03:11 AM | #13 | |
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Regarding the tire width, have you measured it on a 11" wheel or 10.5" wheel? Or, did you measure it off the wheel? The wheel width usually dictates the effective width of the tire, which is why the tire manufacturers also publish the wheel width used to measure the specs. In my experience, the only significant difference occurs when you compare a square cut tire to a round-cut one. The discrepancy you see might be due to measuring the width with a narrower wheel, or with no wheel at all. Below is the picture of 305/30/19 RS-3 on 10.5" wheels vs. 305/30/19 Trofeo R on 11.5" wheels. When I measured the difference in width of these tires, it was almost 1", almost exactly equal to the difference in their fitted wheel widths.
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01-01-2016, 11:06 AM | #14 | |
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Just to be clear, the section width changes with wheel width; not the tread width. The rule-of-thumb is: for every 1/2" change in wheel width, the section width changes by 2/10". |
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