How To MEASURE WHEEL OFFSET

**Disco_owner** · 8th May 2008, 08:23 AM

How To MEASURE WHEEL OFFSET - based on tyre 245mm wide (nominal 245/75/16)
- Remove a wheel ( in my case spare tyre ) lay the outside face of the wheel flat on the ground. (So now your looking at the wheel mount face)
- Place a flat piece of material or other flat material wider than the tyre on top of tyre,
and carefully measure from the ground the overall height (or width) of your tyre & rim package = eg. 248 mm high.
Then divide your answer by 2 = 124 (this gives you the centre line of the rim and tyre)
- Place a ruler though the middle of the rim and measure from 'ground to wheel mount face' = eg. 120 mm
- now Subtract 124-120 = 4 mm. This is my wheel offset.

Arrrrgh

wrong off-set need at least -25mm Rim Offset. sigh...

I hope you have enjoyed this Tutorial and hasn't been a total waste of time reading it.

**p38arover** · 8th May 2008, 08:29 AM

Or, if you have standard LR rims, read it directly from the numbers stamped on the rim.

Defender (except 130), County, Rangie until 1995, Disco 1 have 33 mm offset.

D2 and P38A have 57mm offset.

**Disco_owner** · 8th May 2008, 08:56 AM

Originally Posted by p38arover

Or, if you have standard LR rims, read it directly from the numbers stamped on the rim.

Defender (except 130), County, Rangie until 1995, Disco 1 have 33 mm offset.

D2 and P38A have 57mm offset.

Thanks Ron,
Is that +ve or -ve offset ? I suspect -ve , Hence,am I better off putting original LR Alloy Rims back on with new tyres 255/85R/16's?

I spoke to Les Richmond in Melb This morning and was advised I need at least a -25mm offset if I want to go with this size tyre or bigger,

**p38arover** · 8th May 2008, 07:46 PM

Positive.

See the images I posted in this thread: Steelie Rim stamps - 5,50F x 16 x 33

**gazk** · 8th May 2008, 08:03 PM

Hi all, a couple of months back I found this site that describes very clearly just about all you ever wanted to know on this and many other automotive questions.
Car Bibles : The Wheel and Tyre Bible Page 2 of 2

hope it helps.

**Disco_owner** · 8th May 2008, 08:41 PM

Ron;

With 255/85R/16 or bigger , I was Recommended Rim Size of 16x8 " with a -1" ( -25 mm) off-set, I spoke to Andrew Richmond this morning from Rangie Spares , but from what you're saying I need a +33mm offset

I'm confused.

Rangier Rover · 8th May 2008, 08:48 PM

Originally Posted by Disco_owner

Ron;

With 255/85R/16 or bigger , I was Recommended Rim Size of 16x8 " with a -1" ( -25 mm) off-set, I spoke to him Andrew Richmond this morning from Rangie Spares , but from what you're saying I need a +33mm offset

I'm confused.

A -25 will do 12.5x35 on 8" and is likely all an engineer will sighn off. Trust me it will work I've done a few. More tham -25 will only cause dramas

**weeds** · 8th May 2008, 09:12 PM

Originally Posted by Disco_owner

I'm confused.

so am i

and i'm not even thinking about going bigger or wider

**Disco_owner** · 8th May 2008, 09:35 PM

Originally Posted by Rangier Rover

A -25 will do 12.5x35 on 8" and is likely all an engineer will sighn off. Trust me it will work I've done a few. More tham -25 will only cause dramas

Thanks for the clarification Rangier_Rover

PM sent.

**Slunnie** · 8th May 2008, 09:37 PM

Originally Posted by Disco_owner

Ron;

With 255/85R/16 or bigger , I was Recommended Rim Size of 16x8 " with a -1" ( -25 mm) off-set, I spoke to Andrew Richmond this morning from Rangie Spares , but from what you're saying I need a +33mm offset

I'm confused.

The good thing about the -25mm offset, is that its a standard Landcruiser rim offset, except it has a rover pattern centre.

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