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New Tyres :D

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jdmr288
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Re:New Tyres :D 2011/08/18 18:01:38 (permalink)
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What sizes did you get and roughly how much for each?

#16
dylmrt
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Re:New Tyres :D 2011/08/18 18:38:57 (permalink)
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For clarification,
 
G-man got AD08 in 215/40/17 and 235/40/17, tyres and shipping came to around $1150 at the time, but $1200 at today's rates. So yes the tyres were about 200 each but shipping is expensive lol.

 
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#17
G_Man
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Re:New Tyres :D 2011/08/19 09:26:37 (permalink)
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Yeah it's a shame they have to come half way around the world. I think it was about $350ish for shipping (At the time). But it still works out pretty good compared to full price retail here. I've "heard" of people getting quoted up to $450 a corner for a comparable 17" size.
 
As a comparison my local Tyreshop where I bought my Toyo T1Rs for my stock 15" wheels they charged me a bit under $700 total, fitted, balanced and for the wheel alignment. When I got them to quote up for my 17"s (215/40r17 235/40r17) it was about $1250! For a mid-level street tyre? No thanks!
 
Needless to say getting Dylan to source me the AD08s for a comparable cost was a complete no-brainer!
 
Having said that you guys have me curious about the RSRs, I would imagine that their dry performance would be better than the AD08s but from the sounds of things the wet weather performance would be worse? For me the wet weather performance was a big factor. I live up in the Dandenong ranges and the twisty roads can get very wet and greasy!
 
Anyway getting a bit off track, I thought we were talking about KU36s

....insert witty comment here.....
#18

dylmrt
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Re:New Tyres :D 2011/08/19 10:01:15 (permalink)
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The compound of the federals is amazing, but the sidewall strength however lacks against the AD08.
 
As a result most of the clubsprint racers at WTAC this year were running the AD08 at EC.

 
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#19
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Re:New Tyres :D 2011/08/19 10:08:39 (permalink)
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i have the federal SS and they are **** in the wet. i know they are not the others beign discussed here but just chiming in
i can manage to loose traction on 245/40/17 in the back while just boosting in 2nd on a wet road. and im running stock boost.
i need to change them cause they do scare me in the wet.

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#20
MRTurbo
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Re:New Tyres :D 2011/08/19 11:00:55 (permalink)
+2 (2)
People don't realise, wider does not automatically mean better (esp. in the wet). People who say wider tyres produce more grip "because there is more rubber on the road" are wrong. When you make a tyre wider, you alter the contact patch to be wider , but it reduces in length. So depending on sidewall stiffness, a wider tyre can actually give less rubber on the road. It depends on the car, the situation, the conditions. 
N.B.
1)  Wider tyres are more prone to aquaplaning.
2)  Wider tyres are more sensitive to camber control.
3)  Wider tyres on the same rims might not perform as expected, as rim width relative to tread width can have a significant effect.
4)  It is virtually impossible to get a result with all other things being equal as there are a lot of variables.
post edited by MRTurbo - 2011/08/22 14:09:24

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#21

G_Man
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Re:New Tyres :D 2011/08/19 15:45:48 (permalink)
+2 (2)
Aah yes, the wide tyre myth. Yes, all things being equal the skinnier tyres are better for the wet.
 
The "more grip" comes from the fact that wider tyres can be a softer compound because they disperse heat more efficiently. My previous T1Rs in the relatively narrow stock width were very good in the wet, and the tread blocks moved quite a bit too, generating a lot of heat which gave them very surefooted wet grip. However that same characteristic made them overheat and burn out in the dry very quickly. It's no wonder my rears only lasted 8 months!
 
In fact when they were new the wet weather performance was so good and the dry weather performance so poor by comparison that it evened out their performance. i.e. I could drive in the wet pretty much the same as if it were dry. Of course after they were worn in and hardened up a bit it was a different story.
 
Now then, having said that, the wider AD08s I'm now running feel quite comparable to the T1Rs in the wet, but are MILES ahead of them in the dry. Very good steering response too with their stiff sidewalls. Yet as I've mentioned before the ride comfort is actually quite good. But I do also have SSR Type Cs which in 17" form weigh about the same as the stock 15"s. So my total unsprung weight is not much more than the stock wheels, which obviously helps my stock suspension to maintain it's compliance with the road.
 
*edit* Sorry I should mention, I don't mean to say that the AD08s are "magical" tyres, a level of caution and respect must still be observed. If I go WOT in 1st and 2nd they can still spin up in the wet, but half-3/4 throttle with a bit of boost is generally no problem at all.
post edited by G_Man - 2011/08/19 15:56:17

....insert witty comment here.....
#22
zmit
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Re:New Tyres :D 2011/09/18 20:07:59 (permalink)
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purple5ive 

i have the federal SS and they are **** in the wet. i know they are not the others beign discussed here but just chiming in
i can manage to loose traction on 245/40/17 in the back while just boosting in 2nd on a wet road. and im running stock boost.
i need to change them cause they do scare me in the wet.

 
.... Ah bugger....
I just bought a set.
Coming from RE001s (that are two years old now on a daily driver)... I have a feeling i'm not going to like them.
We'll soon see. 

1992 SW20 GT
... and loving it...
#23
MRTurbo
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Re:New Tyres :D 2012/02/29 12:04:32 (permalink)
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KU38 treadwear = 180
KU36 traction = ??
RS-R treadwear = 140
RS-R traction = AA
AD08 treadwear = 180
AD08 traction = AA
 
KU36 needs heat to work, RS-Rs work well from cold? and KU36 is bad in the wet while RS-R is good in the wet.
 
So is KU36 cheapest followed by RS-R then AD08 most expensive?

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#24
Adrian
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Re:New Tyres :D 2012/02/29 23:22:34 (permalink)
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KU36 don't need heat to work. On the street they work every bit as well as a regular street tyre from dead cold. They simply get better with some heat in them. At the track, the first lap feels a little bit skatey until temps and pressures increase a bit. But that would be true of any of these tyres.
 
As for heat cycles, they can deal with them just fine. They're still a street tyre. Not like semi slick that doesn't like too many heat cycles. Had a set on my old car and they lasted 12 months with 10 track days or more. No significant decrease in grip due to heat cycling. Went well until they were bald.
 
Excellent grip in the dry and very predictable. They can also tolerate quite a bit of heat before they start melting and falling apart. Not so great in the wet though. Still fine for street use, even in heavy rain. Just not as grippy or predictable as an AD08 for example.
#25
MRTurbo
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Re:New Tyres :D 2012/03/02 09:17:11 (permalink)
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Thanks for that Adrian
What are the sidewalls like on the KU36? 

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#26
Knightrous
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Re:New Tyres :D 2012/03/02 12:22:29 (permalink)
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+1 to Adrian's comments. I found the KU36's on the street didn't need much heat at all to perform fantastic. 3-4 good corners and they were ready. On the track, the warm up lap was all I ever needed to fell comfortable with pushing hard (spent more time getting the brakes warm...). They get a little better a couple of laps in as the tire pressures come up and balance out.
 
Sidewalls on the KU36 are superior to those on the Toyo Proxes tire range and the sub-KU31 range from Kumho, from my experience with using these products in the 205/50R15 sizes.
#27
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