Mobius

iTrader: (2)

I have a set of 225/45/R15 Toyo RRs inbound from Tire Rack. Track day is 3/15. I shall report. They are replacing 225/45/R15 RS3's on 6UL 9s.

Hoe

I'm still on 195/50/15 R1Rs from last season- even at 1/3 tread, I was able to get FTD and 2nd PAX in the wet at the last BRR-SCCA autocross. Personally, I like the way these drive over all the competitors tires (haven't driven rivals yet, will at the NJ ProSolo)

philstireservice

iTrader: (1)

Why Tire Rack?

Mobius

iTrader: (2)

Two things. 1, I was in a hurry. I ordered them Friday afternoon at 3pm, and they heat-cycled them and got them to my door Monday afternoon with standard shipping, giving me plenty of time to get them mounted.

2, TR has a warehouse in Nevada. I don't mind ordering and waiting for stuff to be shipped from the East Coast, but as these tires are sensitive to being frozen, and given this winters' weather, that was not an option for early March. Summer, sure, but not when winter won't let go.

zossy1

iTrader: (4)

Last weekend I ran a set of Yokohama Advan A050s (Medium compound) and they are phenomenal tyres. As much as 1.5 seconds a lap faster than Dunlop slicks and nearly 2 seconds a lap faster than Kumho s700 slicks. That would make them around 3 seconds a lap faster than an NT-01 which is hard to believe, but the clock doesn't lie. I went from mid-pack to a second place finish, beating home several cars with six figure build cost (including four NC 2.5L cars).

The A050s are ******* expensive, but worth every cent as they are very consistent as they wear. One of the quickest guys in my class is still running at the front on a 2 year old set with 1500+ race miles on them.

I have just received a set of R80 Hoosier slicks in 245/580/15, so it will be interesting to compare how they perform to the Yokohama. I still can't believe this tyre is not being sold in the states, it is an incredible tyre. For those of you forced to run treaded tyres, id be surprised if these aren't as quick as DOT Hoosiers and certainly miles faster than any other R Spec semi slick on the market. Will report back soon on how they compare to the Hoosier slicks.

zossy1

iTrader: (4)

Finally ran Hoosier R80 slicks today and they are as advertised. Damn sticky. They are around a 0.8-1 second faster than A050s around a 2 minute circuit, and id say 4.5 seconds faster than the NT01. They are slower to come up to temperature though so you are vulnerable to A050 runners for the first couple of laps.

EDIT: but the R80 slicks also heat cycle out. By the end of the weekend, they were back to the same pace as A050s

SK-NZ

Ran Potenza RE002s on my 15x7.5 (hurray legality issues ) 6ULs at a recent autocross. A mix of bad tarmac and driver stupidity had me chunking/melting my front right tire by the end of the day. Oh well, you live and you learn lol. Did get a bit greasy once it got huge amount of heat in it but this could be due to ruining them after 2 runs.

YMMV

mx5-kiwi

EDIT - missed this .... NTO1's on 9" 6ul's are amazing. Dropped another 1.5 -2 secs. My strange tyre wear (right rear bald stripe 1/3 in from outside edge) has gone, tyres have lasted twice as long as the Dunlop 205 03g and are only 20% used (3 race meetings, 3-4 track/test days)....I think this is more to the width of rim than the tyre but could be either....


Any word or update on this tyre?

I am about to purchase this seasons tyres and am very keen to hear more about it...

It seems to good to be true...???

zossy1

iTrader: (4)

Buy A050s. They are unbelievably good. Very expensive, twice the cost of NT01s here in Oz, but worth it!! Hopefully you can get them in NZ...

EDIT- make sure you get the "Medium" compound unless you are doing time attack or super sprints - the softs and super softs are no good for anything but a couple of (very fast) laps at a time.

mx5-kiwi

Thanks Chris, just out of interest , what do you pay for NT01's there?

and the Yokohama?

I just got quoted $300.00 a tyre for the NT01, annoying as my contact is now a branch manager and seems reluctant to do me the price he snuck me last time!

zossy1

iTrader: (4)

Back in March, I bought 2013 dated 205/50/15 NT01s from St George Tyres for $220 AUD a corner fitted and balanced. I could buy 2011 dated stock for $199 per corner.

The Yokies are around $335 in 205s, and $374 in 225s - Yokohama Tyres | Racing Tyres From Yokohama: ADVAN A050 R Spec Sizes and Reviews

mx5-kiwi

Reading the reviews on the Aussie Yokohama site is amazing.

They are not bought in to the country so I may have to get creative.......My Tyre guy has asked the local Yokohama guy to price up but it will be a one off delivery so probably astronomical.

The problem is shipping from Aussie to here is often more than from the States!! then add the margin they will wack on.....it's gonna sting.

Might have to go on holiday and take a couple of big boxes with me

nathanhasa_carr

iTrader: (2)

Bridgestone Potenza re-11a (205) on Kosei K1's. I like them, especially for an all purpose DD (in warm weather) and occasional track event. I picked up a second set of wheels so I can now get a more aggressive tire for the track. I was thinking something along the lines of R-comps like Toyo's Proxes R888

CTSparky

our lemons team is required to run above a 190 treadwear tire.. so we picked up BFG Rivals... We have had 3,000 race miles on them and they are still holding up well, we may get another practice on them or so.

Edit: running 205/50/15 as per spec on Kosei K1's.

We could probably squeeze another lemon event on them if we had to.

We run a 1.6 at 2000# and run mazda sport springs and bilsteins. We do push the car and the tires hold up well, very progressive, not a ton of noise , but when they start to slip they let you know and you are able to recover afterwards.

for a daily with some track duty I recommend them.

adriver1990

iTrader: (1)

Mobius,

Any comparison between the RS3s and the RRs? How much time? I am on Nt01s but, I am thinking about making the switch to RRs.

Thanks
Evan

philstireservice

iTrader: (1)

Just a heads up - when you're ready to buy your RR's - we have them in stock and they are shipped FREE. We also can heat cycle them if you need $10 per tire!

k24madness

iTrader: (6)

It's worth mentioning your have them $4 per set cheaper than TR before the free shipping.

Mobius

iTrader: (2)

My only comparative laptimes are for PIR, which leans toward being a power course. Both tire sizes are 225/45 on the same 9" 6ULs.

RS3: 1:32.4
RR: 1:29.4

I got about 7 track days out of my RR's, with a couple of autocrosses on rough pavement. With more front camber and no autocrosses might could have gotten 10 days. I really like the RR compared to the RS3; the tire is consistent, easy to drive, and the grip vs slip angle has a sizable plateau - grip doesn't fall off quickly if you exceed peak slip angle.

I would say the 3 seconds is representative. There was one change to the car for the RR time, the AC had been removed at that point (~32lb), but that time was also set on track day #8, well past the peak grip of the tires.

JSpeed6

iTrader: (3)

did some more testing last weekend in TTE.

last time i was at this track over a year and a half ago, i did a 1:08.1x on 205 NT01s.
this time, i did a 1:07.700 on 205 RC-1s. when i did this, they were on their 35th heat cycle, and are still roughly 1-2mm above the wear bar. temps were mid 80's in AZ. Granted, the more serious changes were an aero package when i had the 01's, with the RC1's i have no aero but switched from a 4.3 to a 4.7 RP

track record is a 1:06.757 on near dead hoosiers (unsure of 205 or 225 size). im happy with that.

Efini~FC3S

iTrader: (4)

So the difference between the 1:08.1 and 1:07.7 was:

Tires

Aero

R&P


Kind of hard to draw a strong conclusion here... what had the biggest impact?