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landoman
17th February 2016, 05:58 PM
Anyone know where in Sydney I might pick up a secondhand 7J x16 alloy wheel
For a Defender .........want it for second spare just need the wheel not the tyre

Dopey
17th February 2016, 06:15 PM
What offset are you after?
Land vehicle spares at silverdale has quite a selection of wheels, but probably not the +20.6 offset sawtooths.
I've got some +30.0 offset Range Rover alloys in west Ryde if you want some of them.

Mike.

Edit: they're free...

landoman
17th February 2016, 06:36 PM
What offset are you after?
Land vehicle spares at silverdale has quite a selection of wheels, but probably not the +20.6 offset sawtooths.
I've got some +30.0 offset Range Rover alloys in west Ryde if you want some of them.

Mike.

Edit: they're free...

I'm not sure I understand "offset ' .........how do I measure that .....I'm afraid I'm mechanically challenged ...

This wheel would need to be suitable to run with the black sawthooths ....all I know is they are 7 j x 16 ........and has 5 nut holes

I'll look into landvechicle spares see if I get lucky

Dopey
17th February 2016, 06:53 PM
Basically, 0 offset means the center of the wheel is where the hub mounts,
If you have a - offset it means that the wheel sticks out further from the wheel center and henceforth the wheel tyre sticks further outside the side of the vehicle.
If you have a + offset the majority of the wheel is further towards the center of the vehicle,
All standard Defenders run from factory a + offset wheel, mostly +33.0mm
Some run +20.6, like the sawtooths are whereas most other factory alloys (that I know of) are a +33.0mm.
The +30.0 offsets will run OK as a spare in place of the sawtooth ones.

Mike.

Edit, the measurement is actually +33.0mm offset, not +30.0mm! I've got 30mm on the brain for some reason...

landoman
17th February 2016, 07:26 PM
Basically, 0 offset means the center of the wheel is where the hub mounts,
If you have a - offset it means that the wheel sticks out further from the wheel center and henceforth the wheel tyre sticks further outside the side of the vehicle.
If you have a + offset the majority of the wheel is further towards the center of the vehicle,
All standard Defenders run from factory a + offset wheel, mostly +33.0mm
Some run +20.6, like the sawtooths are whereas most other factory alloys (that I know of) are a +33.0mm.
The +30.0 offsets will run OK as a spare in place of the sawtooth ones.

Mike.

Edit, the measurement is actually +33.0mm offset, not +30.0mm! I've got 30mm on the brain for some reason...

Thanks Mike ....great explanation .....now silly question if you had to fit a 33
Offset on with 3 sawthooths with 20.6 ......would this not cause some problems
On corners as that 33 would be further from the centre ...........or am I confused

Dopey
17th February 2016, 07:39 PM
Positive and negative wheel offset diagram.

Dopey
17th February 2016, 07:49 PM
The sawtooths stick out a few MM more from the wheel/brake hub thingy than the standard alloys.
Running the same tyres, at the same pressures on the road, on the +20.6 & the +33.0, you wouldn't notice the difference except the different looks of the wheels...
You certainly (in a defender) wouldn't notice any difference in handling, it is only when you run slightly wider tyres and start to really flex up the suspension that the more + offset wheel would start to get close or rub on the rear suspension Spring hanger in a 110/130 (more room in a 90 with the slightly smaller Spring hangers).

Mike.

Dopey
17th February 2016, 08:06 PM
Basically disregarding tyre widths, the more negative offset your wheels are, the more your wheel bearings will hate you, while the more positive offset your wheel are, the more your wheel bearings will love you.

Mike.

landoman
17th February 2016, 08:17 PM
So it would be quite safe to say go on the freeway with 3 sawthooths with 20 +
Offsets ......and one 33 + offset other alloy if you had to .........

As I say this is only to be used as a second spare ...so will be rarely used I hope

landoman
17th February 2016, 08:22 PM
So it would be quite safe to say go on the freeway with 3 sawthooths with 20 +
Offsets ......and one 33 + offset other alloy if you had to .........

As I say this is only to be used as a second spare ...so will be rarely used I hope

Also .....no problem fitting a 265 75 16 on that +33 offset 16 inch wheel

p38arover
17th February 2016, 09:04 PM
On LR rims, the offset is marked on the rim:

For example: P38A steel rim - 57mm

https://www.aulro.com/afvb/images/imported/2016/02/363.jpg

P38A Alloy rim - 57mm

https://www.aulro.com/afvb/images/imported/2016/02/364.jpg

RRC/Disco1/Defender rims are 33mm

Dopey
17th February 2016, 09:14 PM
Genuine Land Rover Defender Sawtooth Alloy Wheels RAW Range Rover Classic Disco | eBay (http://www.ebay.com.au/itm/GENUINE-Land-Rover-Defender-Sawtooth-Alloy-wheels-RAW-Range-Rover-classic-disco-/172103229718)

$440 each for new sawtooths, or maybe ask Juddy (Landybitz) on this forum if he sells them too.

I do not think that it would be recommended (or accepted) at all by any state or territory vehicle licensing department, police, or insurance company to run with different offset wheels, however, in an emergency, I have done so.

Mike.

Dopey
17th February 2016, 09:17 PM
On LR rims, the offset is marked on the rim:

For example: P38A steel rim - 57mm

https://www.aulro.com/afvb/images/imported/2016/02/363.jpg

P38A Alloy rim - 57mm

https://www.aulro.com/afvb/images/imported/2016/02/364.jpg

RRC/Disco1/Defender rims are 33mm

Yes, you are correct, however the sawtooths are a different offset than the standard alloys, also I'm not sure about the offset of the new alloys on the adventure models, anyone reading this with an adventure model know what they are?

Mike.

landoman
17th February 2016, 09:22 PM
Genuine Land Rover Defender Sawtooth Alloy Wheels RAW Range Rover Classic Disco | eBay (http://www.ebay.com.au/itm/GENUINE-Land-Rover-Defender-Sawtooth-Alloy-wheels-RAW-Range-Rover-classic-disco-/172103229718)

$440 each for new sawtooths, or maybe ask Juddy (Landybitz) on this forum if he sells them too.

I do not think that it would be recommended (or accepted) at all by any state or territory vehicle licensing department, police, or insurance company to run with different offset wheels, however, in an emergency, I have done so.

Mike.
Ok thanks .......good info

Dopey
17th February 2016, 09:32 PM
Before one of the forum smartarses comes along and says differently to my statements above, I'll add that obviously tractors and some trucks are legally allowed different offsets, but we're talking about Land Rovers.

Mike.

landoman
18th February 2016, 03:17 PM
Before one of the forum smartarses comes along and says differently to my statements above, I'll add that obviously tractors and some trucks are legally allowed different offsets, but we're talking about Land Rovers.

Mike.

Yes you have raised a good point .......issues like warranty and particularly insurance are not to be trifled with ..........I was not aware of the different offsets so I will source A sawthooth.............

51mondays
20th February 2016, 09:20 PM
Basically disregarding tyre widths, the more negative offset your wheels are, the more your wheel bearings will hate you, while the more positive offset your wheel are, the more your wheel bearings will love you.

Mike.

Why is that. ? I've wondered about it and have thought that 0 offset would be most neutral and have least leverage on bearings. Anybody know?

jon3950
21st February 2016, 08:39 AM
Why is that. ? I've wondered about it and have thought that 0 offset would be most neutral and have least leverage on bearings. Anybody know?

Because the face the wheel bolts to is outside, or offset from, the bearing. A negative offset increases the distance, or leverage, between the centre of the wheel and the centre of the bearing. A positive offset reduces the distance, bringing the centre of the wheel closer to the centre of the bearing.

Cheers,
Jon

51mondays
21st February 2016, 01:19 PM
Yeah thanks. Good explanation. Wonder how far the face of the hub is from the bearing centre? Just curious. Probably even on a neg -25 offset that's not a very greatly angled lever on the bearing