Help me understand wheel offset

[Jordie Barretts sock]

I understand it, but I can't comprehend it!

In short, I have a set of 22×9.5 OEM Range Rover Turbine wheels. They are ET49.

I also have a set of aftermarket wheels that are 22x10 ET38

I appreciate that the aftermarket set are half an inch wider which will have a bearing, but what I can't get my head around is will the aftermarket set sit out further from the hub (as well as being half an inch wider)?

My brain says yes, because there is only 38mm from hub face to centreline of the wheel, rather than 49mm.

Someone please put me out of my misery!

[GreenV8S]

Jordie Barretts sock said:

I understand it, but I can't comprehend it!

In short, I have a set of 22×9.5 OEM Range Rover Turbine wheels. They are ET49.

I also have a set of aftermarket wheels that are 22x10 ET38

I appreciate that the aftermarket set are half an inch wider which will have a bearing, but what I can't get my head around is will the aftermarket set sit out further from the hub (as well as being half an inch wider)?

My brain says yes, because there is only 38mm from hub face to centreline of the wheel, rather than 49mm.

Someone please put me out of my misery!

The ET dimension shows how far the center line of the wheel is inset from the mounting flange. A higher ET figure means the wheel doesn't stick out as far.

Changing from 9.5" nominal width to 10" without changing the ET would mean the outer face of the wheel sticks out about an extra 6mm and also reduce the clearance to the suspension components by about 6mm.

Changing the inset from ET49 to ET38 means the wheels will stick out about 11mm more and clearance to the suspension components increases by 11mm.

Taken together, these changes mean the outer face of the wheel will stick out about 17mm more, and you'll have about 5mm more clearance between the inner face of the wheel and the suspension components.

[Jordie Barretts sock]

Thank you!

That makes perfect sense. I just couldn't get my head around it.

[Tymb]

I found this site really useful when I put non standard tyres on my Z4. You can put in loads of info to compare with what you have got and get an idea how they might fit.
https://www.wheel-size.com/calc/

[Jordie Barretts sock]

Tymb said:

I found this site really useful when I put non standard tyres on my Z4. You can put in loads of info to compare with what you have got and get an idea how they might fit.
https://www.wheel-size.com/calc/

That's a really useful site. Thank you too.

[stevieturbo]

https://www.willtheyfit.com/