Upgraded wheel size ?

[PaulM]

Admin Edit: This thread has been extracted from Paul W's build thread to keep things tidy

Paul,
any thoughts on tyre size, I'm looking at 205 and 225's by 17, although I may look at 235's if possible, but I think either 225 or 235's still wont be able to handle full throttle, so I'm not really sure what I'm on about !

[biteme]

I guess I could put it into a spreadsheet that I'm working on at the moment.

Ok, get me the weight distribution of your car :)

[PaulM]

I'll get it on the scales asap, I know standard it should be somthing like this with an average 13st driver

RF 524lbs
LF 483lbs
RR 703lbs
LR 660lbs

[loadswine]

I've got 245/35/17s on the rear of my Roadster if its any help.

[Gary Symons]

I've got 245/35/17s on the rear of my Roadster if its any help.

Interesting, what are the wheel specs? i.e. offset, width etc.
Any rubbing issues?

[loadswine]

Offset is +45 or +50, can't remember exactly, width is 8". No rubbing issues on the rears, but the corresponding fronts (7.5x17 with 205/40s) did have to have a small amount of treatment to the arch liners with a heat gun. Never had an issue with them.

[biteme]

What's the stock wheel sizes on the Mk3?
There's a new file in downloads that might help :P

[PaulM]

IIRC stock at 195 x 50 x 15's on the front and 215's on the back, thats for the older model, hopefully Nigel can dovetail in with the post 2003 spec. I think standard offset is +38.
This a quite a handy comparison tool

http://www.rims-n-tires.com/rt_specs.jsp

[Gary Symons]

The mk3 specs are on spyderchat here:
http://www.spyderchat.com/specifications.htm



Tires

Type: All-season steel belted radials
(Yokohama's or Bridgestone's) (comparison) (http://www.spyderchat.com/tirescomparison.htm)
Size: P185/55VR15 front, P205/50VR15 rear
Model years 2003-05: P215/45VR16
Spare: Temporary, T125/70D16
Wheels

Type/Size: Aluminum alloy,
15 x 6JJ front, 15 x 6.5 rear (2003-05: 16x7JJ rear)
Spare: Steel, temporary, 16 x 4.0 (Europe: full-sized) Offset: +45

[Gary Symons]

What's the stock wheel sizes on the Mk3?
There's a new file in downloads that might help :P


Just had a look at this, excelent bit of work :thumbsup:
Its a bit like the one I did only 1000 times better, particularly like the graphical representation of the wheels.

[PaulM]

I've got 245/35/17s on the rear of my Roadster if its any help.

It does Nigel thanks, I assume thats on standard suspension


Gary, Should we start a new thread on this, i feel we're infecting pauls Mk1 build thread a little

[Gary Symons]

Gary, Should we start a new thread on this, i feel we're infecting pauls Mk1 build thread a little

TB prides itself in threads veering off topic lol
you are probably right though, sorry Mr W

[PaulM]

I've got 245/35/17s on the rear of my Roadster if its any help.


Nigel is that on standard suspension set up ?

Sounds quite a reasnable size, any noticeable handing changes ?

[biteme]

Use this to work it out as well - and play with the gears :)
http://forums.twobrutal.com/downloads.php?do=file&id=34

[Tim Higgott]

Thats fantastic. can someone tell me the original size tyres on the mk1 and also what gear ratio my rev 3 turbo is likly to be running.

[biteme]

its all in there Tim, just select E153 from the gearbox :)

[loadswine]

Nigel is that on standard suspension set up ?

Sounds quite a reasnable size, any noticeable handing changes ?

Nope, mine is on Tein SS, but not far off stock ride height due to my bodykit and all the humps where I live. There are a number of us on ROC who have these and most run with the TTE lowering springs which gives a drop of 30mm. As far as I know, the guys who have them wouldn't swap back, though they do accentuate the understeer characteristics of the Roadster a bit. More so with a little extra weight as I have, but the grip and adaptation of driving style sorts things out. I did an airfield day a few weeks back and my times on the little sprint courses were equal to the very fastest Roadster present ( experienced at the course etc) and a bit better than a Porsche 911, so overall very pleased with my handling now.
Alignment was key to getting that sweet spot though, and I than Matt from AFR tuning for his very thorough geo check and adjustments for that.