Wheels, Offsets And Pcd

[Kavey]

Hey all

I know that some of you guys have upgraded wheels for 18s and 19s. Whilst i'm not quite on the market at the moment for some...yet... i've got too much time on my hands to surf the 'net and get curious about stuff. :P

If I am correct in thinking the IS200s and Altezzas have the same 5x114.3 PCD configuration and I believe a +40mm offset. Is this correct?

Anyway, if stepping up a size or two, it's obviously wise to increase the offsets to ensure that the wheels don't rub the side arches or inner arches. What kind of offsets should one be looking at for 8", 8.5", 9" wheels etc?

What is the maximum safe width an IS range front wheel arch could handle full lock? 8.5"?

Also, if you put wider tyres/wheels on the rear, obviously this will make it more difficult to rotate the wheels, in which case do you then get different offsets for the rears anyway (bearing in mind you won't be putting them on the front)?

Can you get the same wheels in different offsets from most manufacturers? I've seen a lot of offset variations on wheels in the US, but in the UK I haven't found a single website that mentions different offsets for the same wheel (though I haven't rung and asked :D

Anyone technically knowledgeable on these things around to clarify?

Oh and I found this cool tyre calculator thing too by the way for anyone wondering how much their speeds will be out if stepping up with different wheels/tyres... it's probably been posted before, but I found it quite useful. Does anyone know what is considered an acceptable %age variation from stock tyres?

All knowledge appreciated! :)

Asam

[GRiM]

Wheel sizes and offsets are mentioned on this thread.

HERE

However, make sure get your wheels supplier to confirm that they'll fit, or it's a NO sale!!

If you find a set you're interested in, lettuce know.. (piccy's)

[Monster-Mat]

no wider than 8 on the front............

im working on max width at the rear at the mo

at the moment im running 7.5x18 front...45 offset

8.5x18 rear 40 offset

[GRiM]

Mat,

If the offset on your new wheels is different than your existing set, do you need an allignment check done?

[Monster-Mat]

i always do an alignment check after ive fiddled with anything to do with the suspension.

i get my set up looked at every 6 months at the maximum.....255/35/18's cost a dam pocket scorching amount

however wheels like Volk from RAYS ENGINEERING actually weigh less with tyres fitted than the factory wheels with tyres fitted.

meaning there is less unsprung weight.....meaning better performance and handling.