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Pirelli 285/645 Slick

Anyone know anything about this tire besides what you can easily look up on the net? Really just want to know how soft or durable a compound this is and

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Old 02-03-2015, 10:17 PM   #1 (permalink)
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Default Pirelli 285/645 Slick

Anyone know anything about this tire besides what you can easily look up on the net? Really just want to know how soft or durable a compound this is and its ideal temp range. Looks like there is a DS and a DH version?
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Old 02-03-2015, 10:52 PM   #2 (permalink)
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Pirelli uses this tire for World Challenge racing. They really don't publish much info b/c they don't want the general public using this product. I've heard it requires a fully adjustable suspension (and the right setup) to get the most out of either compound.
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Old 02-03-2015, 11:59 PM   #3 (permalink)
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Originally Posted by dkmura View Post
Pirelli uses this tire for World Challenge racing. They really don't publish much info b/c they don't want the general public using this product. I've heard it requires a fully adjustable suspension (and the right setup) to get the most out of either compound.
What he said ....

These tyres are used in the Australian GT Championship in lower power cars (GT4 class) and they are not "generally available" over here - how you would go in the US I have no idea.
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Old 02-04-2015, 12:11 AM   #4 (permalink)
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Quote:
Originally Posted by ValidusVentus View Post
Anyone know anything about this tire besides what you can easily look up on the net? Really just want to know how soft or durable a compound this is and its ideal temp range. Looks like there is a DS and a DH version?
The owner Derrick of the shop I go to drives a full on race Audi R8 and had a pile of these " 3 complete sets" in both compounds today when I was there. He runs a 305/725 on the back but the 285 on the front. Give Derrick a call tomorrow Makes and Models Layton Utah 801-546-2277. Im sure he can give some insight he ran them all last year as well.
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Old 02-04-2015, 02:02 AM   #5 (permalink)
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Yeah, I knew that they are the WC tires and I only asked cause I have a line on a couple sets of them for a good price at the moment.

Thanks Rangerz, will do.
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Old 02-04-2015, 09:27 PM   #6 (permalink)
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My input. I bought a set of scrubs from Brian Kleeman. They were used. I got one day out of them at Road Atlanta, but was 2.5 seconds quicker than on Hoosiers. Got my fastest time ever of 2:36 on them. I don't know which compound they were though. I would assume the softest.
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Old 02-04-2015, 10:04 PM   #7 (permalink)
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My input. I bought a set of scrubs from Brian Kleeman. They were used. I got one day out of them at Road Atlanta, but was 2.5 seconds quicker than on Hoosiers. Got my fastest time ever of 2:36 on them. I don't know which compound they were though. I would assume the softest.
i keep hearing that getting a grippy tire like the pirelli slicks would make me more likely to crash. think their logic is the fall off at the limit is fast and i'd be going faster. not sure...

what do you think? safe to use?



found this OP. there's 6 compounds of this tire



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Old 02-04-2015, 10:32 PM   #8 (permalink)
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Some entrants in our State Championship have used these tyres and our series runs typically 8-10 lap sprints rather than events lasting 30 minutes to 1 hour or 3 hour enduro's which is what the Audi and Porsche's get in the National GT championship..

They all universally say that these tyres give more outright grip BUT they take a minimum of 2 laps to come up to temp and pressure and are diabolical in the meantime (DM and DH compounds). Given that we only get three-quarters of a lap warm-up before a standing start, most guys using these tyres get swamped off the line and have to come back thru the field in the final 3 or 4 laps.

If you want to use these on track days and/or sprints, then be aware of the time to bring them up to temp/pressure and you should enjoy the result, BUT they do not like a large number of heat cycles - they are heat cycled out after 5 or 6 heat cycles whereas an R-Spec might go 15 or 20 cycles.

The other feedback is that they are grippy, grippy, grippy, grippy oh f4rk and you throw the car at the scenery .... not a lot of warning on the limit and you need to be quick to catch a break-away. The pros love them, amateurs are not so sure especially when getting them up to temp/pressure and right on the limit.

Michelin and Pirelli are both represented at this weekends Bathurst 12-hour for GT's which could be a good watch if you are interested in GT racing ... details here:
Bathurst 12 Hour
and more here:
GALLERY: Bathurst 12 Hour set-up - Speedcafe

There is more on SpeedCafe.com as well .. the 12-hour site also has details of pod/webcast
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Old 02-04-2015, 10:35 PM   #9 (permalink)
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Got info from Derrick today. Real nice guy and was happy to talk to me about the tires. Basically the takeaway is that for longer session use (15 mins+), we definitely want to go with the DH compound. DM for a few time attack laps. DS would be ideal for autocross.

-----

Great info, thanks BGTV8. I am always looking for the next GT race to stream! and on that topic, if you live in the US (I know your an Aussie BGTV8) and want to watch a IMSA Tudor race, use Hola and google chrome to make it look like your in a different country and you can view the stream, if thats the only way you can view it.
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