Which other wheels will fit my sierra?

[ayjay]

Just found some good focus alloys locally (about 1/4 mile away)

Thanks for all replies with advice.

However--Whats the "OFFSET" when talking about wheels?

Thanks again

Ayjay

[eSteve]

ayjay,

good question regarding what size wheels fit. I will be buying some alloys at some point. It's good to know the car for which the wheels were intended/taken from, as most people (private sellers) sell their wheels by describing the car they fit, rather than the dimensions of the wheel.

Maybe you could invite members with finished cars to post their wheel sizes. That is; diameter, offset and width, and, if secondhand, the car they were fitted to. The stud PCD should all be the same for all of us, since we all (bar one or two?) have sierra hubs.

With respect to your question on what is wheel offset; this is a snippet from Wikipedia:

"The offset of a vehicle's wheel is the distance between the centerline of the wheel and the plane of the hub-mounting surface of the wheel. It can thus be either positive or negative, and is typically measured in millimeters. Offset has a significant effect on many elements of a vehicle's suspension, including suspension geometry, clearance between the tire and suspension elements, the scrub radius of the steering system, and visually, the width of the wheel faces relative to the car's bodywork. Zero Offset - The plane of the hub mounting surface is even with the centerline of the wheel.
Positive Offset - The plane of the hub mounting surface is shifted from the centerline toward the front or outside of the wheel. Positive offset wheels are generally found on front wheel drive cars and newer rear drive cars.
Negative Offset - The plane of the hub mounting surface is toward the back or brake side of the wheel's centerline.
"Deep dish" wheels typically have negative offset or a very low positive offset.
To maintain handling characteristics and avoid undue loads on bushings and ball joints, the car manufacturer's original offset should be maintained when choosing new wheels unless there are overriding clearance issues."


Plenty of links to info. and pictures here:

Links to wheel offset information and pictures




The actual wheel offset used by builders would of course be useful to know.

Hope that helps

[John.W]

hi all, I have just got a set of 6.5j X15 alloys off a XR2 they are 5 spoke 4 stud from a firm called Boss technology the offset or ET is 37 and the tyre size is 195 50 x 15. I will try to upload a pic later
Regards
John

[ayjay]

OOOOOOOOOOH!!!!!! DEAR ME!!

why is everything HAAAAARD?

Not just a simple matter of banging on a set of alloys is it?

You'll probably be hearing from me further down the line re suspension geometry.

Thanks

[flyerncle]

Consider this,use an alloy wheel similar to the donor original in "J" ie 5 1/2 or larger and say 15" wheel size with 195/55/15 tyre to keep geometry near to original .

The tyre above should give near the rolling radius of the 13/14" larger aspect ratio tyres (higher sidewalls)