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Old 05-12-2016, 01:38 PM   #381
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Also, FYI - There is a handful of 245/40ZR15 VR-1's available on our website right now. Once they're out, it'll be a couple weeks before more arrive.
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Old 05-12-2016, 04:10 PM   #382
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I did a few hard brakes during my last autox that locked up the tires (temps in the high 50s low 60s), no flat spotting that we have been able to tell, still handle great and wear is pretty consistent. Probably going to need ABS+sensors for traction control
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Old 05-17-2016, 09:52 PM   #383
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Well this car is not track worthy nor the driver that owns it lol. After much research and deliberation my son and I agreed that the 6UL 15x9 is "the" rim and the Maxxis 245 is "the" tire. The "Instigator" may not like this but trust me what won't win in the tracks will win the hearts of the would be racers. In my streets and the canyons up in Tahoe this FFS Supercharged and AFCO cushioned 99 10th AE is a capable carver. Now with this Charcoal 6UL 15x9 and a stricky Maxxis 245, she will be a monster. That's all we do for now......................we're not worthy but we got a little bit of play money so here she is.........





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Maxxis VR-1 245/40/15-img_3751_zpsijreulsw.jpg   Maxxis VR-1 245/40/15-img_3750_zpszof7omx3.jpg   Maxxis VR-1 245/40/15-img_3749_zpsbkpoyijm.jpg  
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Old 05-17-2016, 10:02 PM   #384
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Quote:
Originally Posted by AndyHollis View Post
You have the current 2015 tire. 2016 is still not in stock in any size. Mine were test tires and I had to mark them so as not to get confused. They did have build dates two weeks apart, but that was irrelevant.

Per one of TR's higher-up's:


Further, in first-hand convo with TR on Saturday during the One Lap skid pad event, the running changes will appear in each affected size as existing stock is sold-out. This is typical for running changes made in the tire market.



You are confused. That aero-drag comparo was between the 245 VR1 on 9 and 10" wide wheels. Since the extra wheel width is entirely outward, the tire sticks out further into the airstream. That's why I love running dataloggers, 'cuz you find stuff like that. Surprised me how big of a deal it was.
My bad, who'da thunk the 9 would be faster.
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Old 05-17-2016, 11:53 PM   #385
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I'm looking at getting a new set of 205 or 225 tires for street and rain track use. Does anyone know how thelse vr1s would compare to let's say a toyo r1r in the rain?
It seems like every time I do a track day it rains.
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Old 05-19-2016, 08:37 AM   #386
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Sidebar, but how do these compare to say an RS-3? Considering them for my subaru as they come in a 255/40R17...
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Old 05-19-2016, 01:21 PM   #387
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Originally Posted by wannafbody View Post
My bad, who'da thunk the 9 would be faster.
It was only faster on the straights. Everywhere else, the 10 was faster. Overall lap time was still faster on the 10, but closer than it would be when we later tested at Harris Hill, which has no really long straights.
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Old 05-30-2016, 10:52 AM   #388
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When is the new batch of 245s expected to become available?
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Old 06-01-2016, 10:16 AM   #389
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When is the new batch of 245s expected to become available?
They are available now.
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Old 06-01-2016, 09:32 PM   #390
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Originally Posted by ot81to View Post
They are available now.
Do you know if they are going to be readily available for the rest of the year or are they going to go out of stock towards the end of the summer until next season like the RS-3s do? I put about 2200 miles on mine in 10 driving days going to Miatas in May down in Travelers Rest SC and ZdayZ at the Tail of the Dragon and they are now down to about 50-60% tread. I still have the Miatas at the Gap, Miatas in Boone, and Fall in Fontana events plus how ever many impromtu mountain runs I do in between this season.

BTW, they are the best street tires I've ever run on my car, love them!
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Old 06-01-2016, 09:45 PM   #391
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Anyone ran these in competition in the rain?

I've never liked only having a 225mm wide tire for the rain.
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Old 06-01-2016, 09:58 PM   #392
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Originally Posted by TNTUBA View Post
Anyone ran these in competition in the rain?

I've never liked only having a 225mm wide tire for the rain.
I'd eat my shorts if they are faster than a 225/45 Hoosier H20 in the wet.
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Old 06-02-2016, 12:56 AM   #393
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Originally Posted by Savington View Post
I'd eat my shorts if they are faster than a 225/45 Hoosier H20 in the wet.
..or a 205 H2O for that matter.
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Old 06-02-2016, 08:11 AM   #394
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Originally Posted by TNTUBA View Post
Anyone ran these in competition in the rain?

I've never liked only having a 225mm wide tire for the rain.
I agree with Andrew and Emilio, though not totally. Wall of text ensues...

Rain is such a tricky thing to describe and test, as many factors come into play:
  • depth of water (damp, standing, deep puddling),
  • consistency of depth (puddles, deep running),
  • texture of surface (smooth, irregular rough, brushed/grooved)
  • ambient temperature
  • Speeds
  • length of activity (autocross run, time trail lap, full session, enduro)

As in the dry, compound is the primary contributor to grip...and optimized racing tire compounds are compromised to be better than street tires within certain active heat ranges. In the case of a dedicated wet, the tiremaker can go way softer vs a dry tire because the water will constantly cool the compound off. That said, there is a limit and if ambients are cold enough, and sessions short enough, the compound will be outside of its active range during use. Normal street tires compromise the other way, with a way larger range of active temperature but lower overall grip. The latest round of 200tw street tires have blurred that line somewhat, landing somewhere in the middle.

A great example of this was at One Lap this year, where we had quite a bit of rain of varying amounts throughout the first part of the week. At the wet skid pad (high 40's ambient), everyone on RE71R's was tightly grouped in the middle of the pack regardless of car/driver, and everyone in front was on Michelin PSS. At the rear of the field were those that chose the Z06-spec PSS ZP run-flat with the trick Sport Cup 2-like compound. It had nothing to do with depth of water, as the cars were not hydroplaning. It was totally temperature based. I was on Bridgestones and the grip simply was not there even at a speed of 40 mph.

This also played out at the next couple of tracks in New England. Once we got further south (NCM), the RE71R drivers moved up even in the rain, because it was 70's ambient. Then it dried for the rest of the week, and the PSS folks were at a disadvantage.

Hydroplaning is what everyone thinks about with rain tires, and it is indeed a factor, especially on the track. Hydroplane resistance is all about speed, tread design evacuation properties, and tire pressure (too little is bad). Width of tire is also a negative contributor as it affects the evacuation properties due to change of contact patch shape (size of patch does not change). Like a hull on a boat, a thin one slices through the water better. And the faster you go, the more the boat wants to ride on top of the water rather than slice through it. So the hydroplane resistance on track is way different than at a typical autocross.

So I would bet money that there is a temperature below which the 245 VR1 is faster than either the 225 or 205 H20...and it's probably somewhere in the low 40's...for a single autocross run or time trial lap..in more-than-damp water. But if the water was deep enough, and speeds high enough, the 225 or even 205 VR1 might be faster than the 245.

Back when I was serious about national autocross, I used to bring two sets of rains. One for deep and/or colder conditions, and another for damp/warmer. Full wets and intermediates, effectively.
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Old 06-02-2016, 03:56 PM   #395
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Quote:
Originally Posted by AndyHollis View Post
I agree with Andrew and Emilio, though not totally. Wall of text ensues...

Rain is such a tricky thing to describe and test, as many factors come into play:
  • depth of water (damp, standing, deep puddling),
  • consistency of depth (puddles, deep running),
  • texture of surface (smooth, irregular rough, brushed/grooved)
  • ambient temperature
  • Speeds
  • length of activity (autocross run, time trail lap, full session, enduro)

As in the dry, compound is the primary contributor to grip...and optimized racing tire compounds are compromised to be better than street tires within certain active heat ranges. In the case of a dedicated wet, the tiremaker can go way softer vs a dry tire because the water will constantly cool the compound off. That said, there is a limit and if ambients are cold enough, and sessions short enough, the compound will be outside of its active range during use. Normal street tires compromise the other way, with a way larger range of active temperature but lower overall grip. The latest round of 200tw street tires have blurred that line somewhat, landing somewhere in the middle.

A great example of this was at One Lap this year, where we had quite a bit of rain of varying amounts throughout the first part of the week. At the wet skid pad (high 40's ambient), everyone on RE71R's was tightly grouped in the middle of the pack regardless of car/driver, and everyone in front was on Michelin PSS. At the rear of the field were those that chose the Z06-spec PSS ZP run-flat with the trick Sport Cup 2-like compound. It had nothing to do with depth of water, as the cars were not hydroplaning. It was totally temperature based. I was on Bridgestones and the grip simply was not there even at a speed of 40 mph.

This also played out at the next couple of tracks in New England. Once we got further south (NCM), the RE71R drivers moved up even in the rain, because it was 70's ambient. Then it dried for the rest of the week, and the PSS folks were at a disadvantage.

Hydroplaning is what everyone thinks about with rain tires, and it is indeed a factor, especially on the track. Hydroplane resistance is all about speed, tread design evacuation properties, and tire pressure (too little is bad). Width of tire is also a negative contributor as it affects the evacuation properties due to change of contact patch shape (size of patch does not change). Like a hull on a boat, a thin one slices through the water better. And the faster you go, the more the boat wants to ride on top of the water rather than slice through it. So the hydroplane resistance on track is way different than at a typical autocross.

So I would bet money that there is a temperature below which the 245 VR1 is faster than either the 225 or 205 H20...and it's probably somewhere in the low 40's...for a single autocross run or time trial lap..in more-than-damp water. But if the water was deep enough, and speeds high enough, the 225 or even 205 VR1 might be faster than the 245.

Back when I was serious about national autocross, I used to bring two sets of rains. One for deep and/or colder conditions, and another for damp/warmer. Full wets and intermediates, effectively.
That's exactly what led me to ask the question.

The A6 was "decent" in damp conditions.

On a light car. The A7 is HORRIBLE in the damp. Once the surface has changed color....with A7s....you are a passanger...might as well unhook the wheel. We find ourselves driving from "dry patch to dry patch" rather than following anything that resembles a "line."

The H20 is a good "full wet" choice. But for damp conditions where there isnt standing water over most of the course...or for certain temperature conditions...I'm betting that a tire like the Maxis(IE fast current crop of street tires) has the potential to be faster than the A7 or H20.

Just looking for a data point....but it doesn't sound like one exisits yet
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Old 06-03-2016, 09:52 AM   #396
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Quote:
Originally Posted by TNTUBA View Post
The H20 is a good "full wet" choice. But for damp conditions where there isnt standing water over most of the course...or for certain temperature conditions...I'm betting that a tire like the Maxis(IE fast current crop of street tires) has the potential to be faster than the A7 or H20.

Just looking for a data point....but it doesn't sound like one exisits yet
Theoretically, a shaved H20 would make a good intermediate. Enough water to keep the compound from overheating, but enough tread to channel away hydroplane puddles.

Empirical results suggest that A7 compound runs at a bit higher temp than the A6 compound...trading off some basic softness for better longevity.
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Old 06-20-2016, 09:32 PM   #397
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I really, really like these tires for the mountain driving we do around NC/SC/TN. This is how mine are looking after 2200 miles. Approximately 730 miles of that was on the highway getting back and forth to Miatas in May in SC and ZdayZ at the Dragon and the rest were 'spirited driving' in the twisties.



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Maxxis VR-1 245/40/15-img_20160619_082822309_hdr.jpg   Maxxis VR-1 245/40/15-img_20160619_082527341.jpg  
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Old 06-24-2016, 02:54 AM   #398
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Quote:
Originally Posted by TNTUBA View Post
Anyone ran these in competition in the rain?

I've never liked only having a 225mm wide tire for the rain.
I ran my H20's for 3 runs in may. then wrapped them back up. took them out to run an all day wet event in october 55-60 degree F day.. I found I could run about a second faster on a set of 205 contenental DW than I could on the H20's.
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Old 06-24-2016, 08:04 PM   #399
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Am I allowed to say stuff referencing Grassroots Motorsports Magazine, if I have a paid subscription and read it on a physical page with my own two eyes? The information would potentially save people here some decent money.
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Old 06-24-2016, 09:19 PM   #400
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if it's been published, of course
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