Help

[ratman]

Ok help needed in the thickie corner

 

can any one explain wheel ET to me as its fooking with my noodle

 

my old 17" chav rims had a ET of +38 but when I messured the back spacing it messured 138mm

 

Now is 100mm a bace line and anything over that a + like mine +38 = 138mm

 

so if a rim has a -10 is it a 90mm back spacing

 

Now if Ive got that right (dout it tho )

 

what Et is a mk1 escort and is a mk2 the same

 

or have I got this compleatley tits up

[Gonzo]

dunno mate but just so you know you ain't the only one who's lost!

[emu]

The centre line of the wheel is 0.

 

+38 means that the mounting face is 38mm from the centreline, towards the 'outside' .

 

-10 means the mounting face is 10mm from the centre line,

towards the 'inside'.

 

I think thats right , but as always im happy to be corrected if the info that im dishing out is complete codswallop

[ratman]

looks like I may be on the right track

 

BUT is 0/centerline = 100mm

[emu]

I dont think so, I think its just that because of the size of your wheels it happens to be 100mm.

 

http://www.procarcare.com/icarumba/resourcecenter/encyclopedia/icar_resourcecenter_encyclopedia_wheels.asp

 

Seems to be a bit of info there

[over_head_cam]

I would have said that if it was an 8" rim then the centre would be 100mm. But having said that, is the true size of the rim measured from inside the bead?

[Retromotorsport]

wheels have equal beads .. so you can measure from inside or outside ..you just need to find the centerline .

 

and then its the distance the the mounting hub face is away from the centerline that is the inst or offset .. oh and the et confuses me .. i thought ET phoned home ages ago

[DeanMk1Capri]

Hi Ratman

 

Just checked in December 2006 issue of Classic Ford Mag and it explains all... do you have it? if not I will give you details.