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Sam Avery
TryHard
south australia
celsior v8

Posts: 185
Reg: 10-2006

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Thursday, March 27, 2008 - 03:56 pm, by:  Sam Avery (Samavery) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

please elaborate on 20's being bad for the suspension...

im going with 245/30/20 because thats legal, and thats how i want it, the splash guards have been removed to make way for the tyres on the wheels. so rubbing on that is not a problem.

a 30 profile is about as uncomfortable as it gets aint it?
Andrew Ferres
DieHard
WA
'90 C-F Celsior V8, '84 Soarer V8, '91 Supra V8

Posts: 800
Reg: 07-2005

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Thursday, March 27, 2008 - 04:33 pm, by:  Andrew Ferres (Peewee) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

The stock 15" rim has about 5" of rubber between the rims and the road.
The suspension is designed with this in mind, and is designed to work with it.

Tyres play a critical part of the suspension.


Increase the 15" rim to 20", and you decrease this 5" to about 2.5" and suddenly you've lost pretty much all of the cushioning that the tyres provide.

This inturn puts extra stress on the suspension and makes it work harder.


On most cars this doesn't matter as a couple of hundred bucks every few years to replace the shock is nothing.
But when its 2k to replace the bags, its a lot more.
Sam Avery
TryHard
south australia
celsior v8

Posts: 187
Reg: 10-2006

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Thursday, March 27, 2008 - 05:05 pm, by:  Sam Avery (Samavery) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

ah ok, all cleared up fellas.

i have a blown bag at the moment anyway, so upgrading the bags is inevitable.
Benny Gammelmark
Goo Roo
NSW
V8 UZZ31

Posts: 2094
Reg: 07-2005

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Friday, March 28, 2008 - 01:48 am, by:  Benny Gammelmark (Oldfield) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Sam Avery wrote on Thursday, March 27, 2008 - 03:56 pm:

im going with 245/30/20 because thats legal




Are you sure? If standard is 15" then the largest legal wheels you can put on are 17", that is at lease what it is in NSW, unless you get a certificate.
Sam Avery
TryHard
south australia
celsior v8

Posts: 188
Reg: 10-2006

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Friday, March 28, 2008 - 01:25 pm, by:  Sam Avery (Samavery) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

yeah benny, if you read the whole thread you will understand.

SA run NCOPS(whatever the hell that is) now instead of the old 2" rule. so its legal with 245/30/20 tyres with a load rating of 89 or higher.
Simon Martin
TryHard
Queensland
Celsoir UCF11

Posts: 128
Reg: 06-2007

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Saturday, March 29, 2008 - 06:49 pm, by:  Simon Martin (Commander) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

no no, it's not that much to do with the rubber side of things, it is a bit but

20s are BIG and HEEEAAAVVVYYYY

The Lighter the wheels the better on your suspension it is. Any schmuck can tell you that. Look man, do what you want cause you obviously will. If department of transport pull you up you're screwed with 20s on. Also you're gonna find out the hard way just how hard 20s are on your suspension.

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