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[capoMV6]

Am replacing my wheels from the standard 17" and upgrade to 19". Is there any adjustment or replacement I need to do with the underchassis or suspension? Also will the series 40 tyre be perfect with it? TIA

[chrisgixer]

Can't remember the sizes but you need to be careful the outside diameter of the tyre doesn't foul the spring cup on the shock that's sited above the tread.
Also re the width, with a 245 wide tyre max, et needs to be within et38 to et30 to avoid strut and wheel arch liner rubbing with camber set to -1.10 . Even then be weary of some tyres with massive rim protection. Such as Bridgestone potenza 010.

Bolt pattern is 110mm

Other than that its plug and play.

I would advise though, that with the inevitable lower profile tyre you'll need , the ride will become much harsher. Personally wouldn't go more than 18" for that reason, especially with the roads in such a poor state ATM.
 

[TheBoy]

A 40 profile with a 19" 235/245 tyre may knock the speedo out a fair way.  You may have to go down to 35, which will make the ride less desirable.

[The Red Baron]

im running 225-40-18 on my mv6 & trust me its very hard. 

[05omegav6]

im running 225-40-18 on my mv6 & trust me its very hard. 

Not surprised, those tyres are on the narrow side... 235/245 recommended 

[TheBoy]

im running 225-40-18 on my mv6 & trust me its very hard. 

When the time comes to replace, worth going a bit wider, to increase the height of the rubber, which will take some of the harshness out (not as much as going back to 235/45/17 though).  Its finding whats good for you, which isn't cheap, given tyre prices.

[The Red Baron]

im running 225-40-18 on my mv6 & trust me its very hard. 

When the time comes to replace, worth going a bit wider, to increase the height of the rubber, which will take some of the harshness out (not as much as going back to 235/45/17 though).  Its finding whats good for you, which isn't cheap, given tyre prices.

you aint kidding j, amazing how the prices differ on such a small size change.

[capoMV6]

Planning to fit 225x45x19 tyres. anything I should worry about? Thanks

[TheBoy]

Planning to fit 225x45x19 tyres. anything I should worry about? Thanks

What width rim, as that's an awfully narrow tyre

Additionally, the rolling diameter will be a lot larger, so all instruments will be out.

[martin42]

Must be going for the euro look with excessive camber 

[tunnie]

I always wonder are bigger wheels an 'upgrade'?

They cost more for new tyres, generally make the ride worse for comfort and take a lot of suspension fiddling.

Are you going for 19, purely for looks?

[biggriffin]

Must be going for the euro look with excessive camber 

you mean 19" wheels and 18" tyres. Its wot da youff is duoing naow in-it..

[chrisgixer]

I always wonder are bigger wheels an 'upgrade'?

They cost more for new tyres, generally make the ride worse for comfort and take a lot of suspension fiddling.

Are you going for 19, purely for looks?

There's a balance to be had IMO. 16" sidewalls are too squidgy IMO. 17" are better, but 18" take out a lot of the ballon effect from directional stability of a tyre sidewall.

But on the other hand, as the wheel gets bigger, the tyre MUST get lower profile. And as tyre is the first point of the suspension, low frequency bumps and small road imperfections come through more.

Ime an 18" on sc3 245 40 18 at 28-30 psi, depending on ambient temp, is spot on.


....for me.

However, given the state of the roads, and some steady driving, a yearning for a fractionally softer ride comes in, as I'm currently running 34psi in case I hit a pot hole.




If tyre cost is an issue, then choose a wheel that give the most common style size.



For the op, I'm fairly sure you need to be 35 profile or under on a 19" rim to avoid fouling the spring cup.

But as said, what width rim, and what ET?

[chrisgixer]

Ps, if you want to see the result of too big a wheel/too low a tyre profile, google the Australian top gear uTube vid of the Holden commadore gts on their test track.

The 19" wheel gave less tyre squeal than the 20" wheel which had a slower lap time. But the 20" wheel had room for mahooosiv brakes. (Which are less effective due to the lower profile tyres) Commadore takes a much bigger rolling circumference than omega, so a generally taller side wall is used, btw.

[cem_devecioglu]

apart from cost,  you will soon end up with problems.. which may cost more money to solve..