alloys...

[aaronc190]

can someone tell some info about alloys..et49?? 100 and 109

what do all these numbers mean?

[brainsnova]

distance from the hub to the outside rim i think

[aaronc190]

y is it so important?
and what does 6j mean?

[Iain]

ET49 is the offset of the wheel. 100 probably refers to the PCD???

You can dig up further information and diagrams for both of them with a quick search.

Edit: 6J will be the width of the wheel. 6 inches I believe.

It's important so you can find wheels that not only fit, but fit well (fit in the arches etc).

[Mike]

100,109,105 etc etc is PCD - Pitch Circle Diameter

PCD - distance in mm from each bolt hole. So, 5 x 100 is 5 bolt holes each 100mm apart from each other.

ET or offset - The offset, measured in millimeters, can be negative or positive, and is the distance from the hub-mounting surface to the rim's true centerline.

EDIT: (ET is the short form of the German word 'Einpresstiefe' which literally translates as insertion depth).

[aaronc190]

ok thanks.
is there much of a differnce in 100 pcd and 109 pcd?

[Mike]

ok thanks.
is there much of a differnce in 100 pcd and 109 pcd?

9mm PCD difference. Basically, yes, a lot!

[Iain]

(ET is the short form of the German word 'Einpresstiefe' which literally translates as insertion depth).

Always wondered why it was ET lol

[Riggy]

mike the pcd is the diameter that the holes are on , not how far aprt they are

http://www.aprh28.dsl.pipex.com/pcd.jpg

[Mike]

^ Ah knew i was somewhere near lol i didnt have my Zeus book to hand lol