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Old 09-17-2007, 07:17 PM
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Originally Posted by XLR83N
i find that the 235/40 are not a good tyre for the 8, my dsc keeps braking for me when i know that it doesnt need to. i think its due to the smaller rolling circumferance of the tyre compared to stock (225/45)
I've had 235/40's fitted for over 20K and haven't had that problem at all. My DSC only cuts in when I step on it too hard exiting a slow corner, which is when it's supposed to work anyways.
Old 09-18-2007, 05:48 PM
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i find the front is the problem, i take a long sweeping corner at speed (which when I had 225/45's it took no problems) but the front left or right brakes activate
cant say i noticed anything from the rear that is different now besides better traction (especially when cornering)
Old 09-18-2007, 05:59 PM
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Hmm, I fitted my 235's to 8.5 rims to maintain the same kind of fit that the 225's have on the 8.0 rims. Might be a stretch (pardon the pun) but maybe that's the difference between our separate experience with that size tyre. I certainly know that people who have fitted 245's to the OEM width rim have complained of tyre squirm, etc.
Old 09-19-2007, 06:54 AM
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I drove on Falken 245/40's on the OEM rims for over a year. The original set I purchased from Len.

These were / are brilliant in the dry and given that they fall in the semi-slick category they were pretty good in the wet.

Compared to the stock re40's however, the road noise deafening.

I've since replaced the original Falkens with a new set of RT615's. These are much quieter.

Now that I have my transformer wheels, the RT615's are reserved for track and extreme excitement days.
Old 09-25-2007, 06:21 PM
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Hey Guys

I need your advice on tyre sizes. I'm going in on Saturday morning for new treads.

I have decided to go the Bridgie Adrenalins. Not a cost factor. I just like the look of them and both the guy from Bridgstone who was at their track day at PI and a mate of my brothers who works at a tyre place both rated them highly.

The problem I have is sizing. I always thought the OE Potenzas on stock rims didn't do much for the car and I wouldn't mind getting more rubber under there on the stock rims. I also want to fill out the guards a bit without doing anything to my suspension.

The options I have are 225/45, 235/40 and 245/40.

The issue is that there is a 14ml height difference between the 225 and 235 whilst there is only a 6ml diff between the 225 and 245. (Don't ask me how or why, that's what I was told.)

I was going to go 235, but given the height difference I prefer the 245. I am getting one of each fitted on Saturday so I can decide. I'm not keen on having different size front and rear. Fussy bastard aren't I?

What are your views?
Is 245 too wide for the front?
What would you do?
Old 09-25-2007, 06:49 PM
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If you want to fill out the guards a bit more, why not try and find a 245/45/18?
Old 09-25-2007, 06:55 PM
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Jormaton, 245 will definately fit in the front. there are guys who have fittedt 275 and even 285 I think. The issue I think you need to consider most is the change in handling. with 225 the car is very neutral. With 245 the car will follow rutsin the road a lot more and the steering in general will be heavier.

As for different front and back, I dont like the ide at all, but if its only short term then not an issue.

For what its worth, my everyday tyres are 245.

Cheers

Andrew
Old 09-25-2007, 09:11 PM
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definatly 245 over 235, 235's are crap imo

with any tyre, when you go wider you are going to follow the 'lines' in the road and steering will become heavier
Old 09-25-2007, 09:15 PM
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Greg,

Some have complained of tyre squirm when fitting 245's to 8' rims. Really depends if you're worried about compromising the sharpness of turn-in. That was an issue for me, which is why I fitted 235's to 8.5' rims.

The diameter difference of 235's makes your speedo optimistic by a few kays but in these heavily policed times, that's no bad thing. Hasn't had any other effect.

Agree with Andrew re: different sizes - not a good idea at all IMHO given the problems some others have had with DSC kicking in too early.

If I were you, I would stick with 225's on the OEM rims as the car is hardly burdened with too much torque for the chassis and fitting wider rubber is more for show than go, unless you've powered up with FI.

That said, if it's just a better look you're after, go for the 245's and hang the dynamic compromises.
Old 09-25-2007, 10:12 PM
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Just to add on the optimistic speedo...when this is the case your odometer will be out. ie your odometer will say 10,000k traveled but you have only done 9,800. Pissy I know but worth remembering.
Old 09-26-2007, 02:29 AM
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Originally Posted by Cromax
If you want to fill out the guards a bit more, why not try and find a 245/45/18?
I don't think they come in Adrenalin with the specs I need.

Plus I think they might rub around corners whilst I'm flying around Winton with Taka, Andrew and the turbo 8s eating my aubergine shinka dust.
Old 09-26-2007, 02:35 AM
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Originally Posted by Revolver
Greg,

If I were you, I would stick with 225's on the OEM rims as the car is hardly burdened with too much torque for the chassis and fitting wider rubber is more for show than go, unless you've powered up with FI.

That said, if it's just a better look you're after, go for the 245's and hang the dynamic compromises.
The only way I'm going to power my car up is if I hang my backside out the sunroof after a extra large tin of baked beans.

I'm just thinking about trying to giver the car a "meaner" look on the road.
Old 09-26-2007, 02:38 AM
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Thanks for the advice guys.

I suppose I'll have to make a decision on the day once I see them on the car.

Cheers

Greg
Old 09-27-2007, 08:41 AM
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Im running Yokohama Advan Sport V103 in the standard 225/45 size. Very happy with them and the price was good ... $350 each but that was a year ago.

Last edited by Lone Ranger; 09-27-2007 at 08:43 AM.
Old 09-27-2007, 11:20 PM
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Wink

I'm running a 225 x 45 R17 Yokohama Db tyre. My bridgies are stuffed, squirming on the road, don't get rid of water in the rain making the tyre skate on the road and at 110kph dat's not nice....
I know I will get pasted for putting a smaller wheel on the car but the tyres are so whisper quiet, the mags fit the car and they are a compromise till my tax check comes in....

I have had 3 options given to me by my tyre guy and I like the sound of a quiet tyre that will see out the remainder of my lease on the car. I have done 40,000kms on the bridgies and they are nearly at minimum tread. I tried to ruin them at the Broadford drive day but it rained for half the day and so the tyres got a reprieve!!

I did have the fleeting thought of trading the car rather than buying new tyres but it was a fleeting thought....... all gone now!
Old 09-30-2007, 08:20 PM
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Hey guys

I ended up getting the 225s.

The 245s looked good on the rims but the tyre dealer wasn't overly confident about them on the stock rims.

I must say also that i have been fairly impressed by the Adrenalins. They are a smooth, quiet ride. I also went out and tested them in last nights rain and they were quite good.

Now onto testing at Winton.

At $250 a pop, also saved some $$s as well.

Cheers

Greg
Old 10-17-2007, 08:29 AM
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Originally Posted by jormatom
Hey guys

I ended up getting the 225s.

The 245s looked good on the rims but the tyre dealer wasn't overly confident about them on the stock rims.

I must say also that i have been fairly impressed by the Adrenalins. They are a smooth, quiet ride. I also went out and tested them in last nights rain and they were quite good.

Now onto testing at Winton.

At $250 a pop, also saved some $$s as well.

Cheers

Greg
Bridgestone Tyre Centre quoted me $341 per corner for 225/45/R18
I wish I can get that kind of pricing here. I am in Sydney by the way.
Old 10-17-2007, 05:03 PM
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Oh, forgot to keep y'all posted.

I got the same tyres as Greg. Most places try to say that $265 a tyre for RE001's is under cost, but it's not.

Anyway, I'm pretty happy so far with them ... they seem to bite into the curves a lot better than RE040s.
Old 10-17-2007, 05:33 PM
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Originally Posted by Andy Wana
Bridgestone Tyre Centre quoted me $341 per corner for 225/45/R18
I wish I can get that kind of pricing here. I am in Sydney by the way.
At that price get the melbourne guys to ship the up to you. Should cost 80-100$ to ship so you are still around $50 /tyre better off.

Cheers

Andrew
Old 10-17-2007, 06:18 PM
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Originally Posted by Ottog
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Compared to the stock re40's however, the road noise deafening.

I've since replaced the original Falkens with a new set of RT615's. These are much quieter.
So are we saying that the RT615's are one of the quietest tyres on the road.....?
Old 10-17-2007, 07:55 PM
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What tyres would you recommend other than Bridgestone RE001 (Adrenalins)?
I prefer something that's quiet and comfortable.
Old 10-17-2007, 08:09 PM
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Originally Posted by Andy Wana
What tyres would you recommend other than Bridgestone RE001 (Adrenalins)?
I prefer something that's quiet and comfortable.

Get some Nangkangs!

They are cheap and have the compound equivelant of a rock. After two track days, theres no feathering at all and quite simply refuse to die.

Theyre not the grippiest tyres in the world but they sure are the hardest wearing!
Old 10-17-2007, 09:03 PM
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Originally Posted by MissyK
Theres heaps of threads about tyres on here
But you can always try calling up few tyre shops and tell them what price range u want and what you are looking for and they will tell you.. once you get those prices and types, come back and tell the forum and get some more ideas.
This is what I've researched so far (price is per corner, balanced and fitted)

225/45/18
Bridgestone Adrenalins - $341

235/40/18
Toyo Proxes 4 - $238
Toyo T1-R - $329
Bridgestone Adrenalins - $324
Yokohama A10B - $250
Dunlop 3000A - $360
Goodyear Eagle F1 - $380
Falken 452 - $300
Pirelli PZeroNero - $600
Nankang - $188

Would be good to get some recommendation since I have no clue what runs well on the RX8 (This is my 2nd week of owning it and it is not a daily drive)
Basically I want something that is close to Adrenalins but under $300 per corner in Sydney
Old 10-17-2007, 09:15 PM
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I can vouch for the Proxes 4. They are a good tyre for the price they are. Cant compare them to the Adrenalins as I haven't driven with them. Compared to the 040's though they are not quite as grippy under hard acceleration and lateral forces (hard cornering) but apart from that I like them. That price is pretty good for them as well, I got 245's for around that price.

As I mentioned previously, you can get the Adrenalins from Melbourne shipped up at around $15-25/tyre so you could get them to Sydney for cheaper than $300.

I am not 100% sure what the rules are on tyre load and speed ratings there, but in Vic you cant get a nankang in the correct size with a relevant speed and load rating so beware.

Cheers

Andrew


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