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Discussion Starter · #1 ·
As were fitting new suspension we have only just worked out that we may need new rims and low profile tyres so we don't get tyre wall flexing. Probley going to get some aluminium ones but we need to work out the offset and we also may get some evo 3 discs but we need 15inch rims. we have some good tyres which were on a escort RS turbo. Tried downloading your program but didn't work can you help?
 
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Discussion Starter · #2 ·
Hi,
I'm a bit confused with your talk about offsets as this wouldn't change with new suspension, The wheel offset on a GSR is 35mm anyway.
What i think your getting at is what profile tyre you need when stepping up on wheel diameter. Well my thinking always was when going up a size in wheel you drop a profile ie:-
14 |EQU| 205/55 R14
15 |EQU| 205/50 R15
16 |EQU| 205/45 R16
17 |EQU| 205/40 R17
Same goes for wider tyres on same diameter rim ie:-
195/55 R 14
205/50 R 14
215/45 R 14
225/40 R 14
I'm running 16 on my GSR with 205/45 tyres which is as near as i can get to original overall wheel/tyre diameter.
Hope this helps,
Paul.C
 
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Discussion Starter · #3 ·
Were not changing the wheels because of the suspension but the actual tyre because it is to high profile if you get what i mean the good suspension would be ruined by the tyres. So while were changing the tyre we thought why not go from 14's to 15's and have light weight ones at that.
 
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Discussion Starter · #4 ·
15 or 16 will certainly make your Whiteline kit more effective and as Paul says the offset doesn't change, just the wheel/tyre combo. I've tested the download of the tyresize program and there are no problems from here.

The only reason that you may reqire a different offset is if you fit the Evo brakes, this may or may not change some of the hub dimensions.

As far as handling/looks/ride comfort goes, 16 would be your best bet, 15s can look a little weedy. Like Paul I run 205/45R16 and with lowered suspension it looks the dogs. 17s, while providing a bit of extra Max Power Factor to my car, would IMHO only make the ride harder.

Talking of Australian imports, I got my copy of 21st Century Performance from Autospeed yesterday, and very good it is too! Only took 5 days to get here aswell.
 
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Discussion Starter · #6 ·
They most certainly do, but shipping costs make it an unattractive proposition unless it's something that you absolutely cannot get in the UK.

As an example, 21st Century Performance cost A$65.95 or about £23, but the shipping (priority airmail admittedly) was another A$54.84 or £19.50!

Most of the stuff they do, filters etc. can be bought here in the UK and indeed some of it (the Race Technology meters for example) is actually sourced here!
 
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Discussion Starter · #7 ·
Hi chunky,
Tried to down load the programme on another computer but i think the problem is that I carnt unzip the file in the right way.
Ive got a set of pirellis of my of RS turbo which are 195/50 R15. Want i really want to know if these will fit the car with the right offset if i buy the right size alloys to match them. If I got the wheel size to tyre size which Paul recommends the offset should be the same. Sorry Im a bit slow on all this.
What does IMHO stand for????????????????

From what you have said in your previous message about Evo 1 brakes I take it that Evo 1 brakes are different to the GSR. Cause ive been talking to Dragon and they may be able to put Evo 3 discs on which have a bigger diameter than the orginal ones. Thus need bigger wheels.

Cheers
Al
 
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Discussion Starter · #8 ·
195/50R15 will fit the car, but I think the rolling radius will be a bit smaller than standard i.e. You'll lose top speed, the speedo will be out, acceleration will improve and your ride height will be lower. Can't really check for sure as I've just figured out that Tyresize doesn't want to work with Windows 2000!

If you have the correct wheel (stud pattern and amp; offset) then the tyres will fit, I think a 6.5 or 7 rim would be needed. However you can almost always get a better deal buying a tyre and amp; wheel package, are these tyres you have really good enough to dictate your choice of wheel?

IMHO - In My Humble Opinion
 
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Discussion Starter · #9 ·
Cheers Chunky,
Will look in to the wheels option when i get chance, carnt have me running around on 14inch when everyone else has 16s, look aright fool. mates take the #### already as they say my wheels are off a pop bottle.
Cheers
Al
 
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