Brake Disc Protection

[Jay]

I am considering wheels with 3" BS. Issue I will be facing is the brake discs wil be naked.

I am thinking of extending the current steel plate that covers to shield it from rocks.
Has anyone done anything similar?

Thanks
Jay

[mickrangie]

3" BS OMG!! I would be worried about the bearings and not the brakes!!

[walker]

3" is 75mm, I thought most of the Rangies were running 80mm......or is that offset, I always get them mixed up.

[ISUZUROVER]

3" is 75mm, I thought most of the Rangies were running 80mm......or is that offset, I always get them mixed up.

You are getting offset and back spacing confused.

Jay - over here wheels like that are very illegal for road use, so there aren't many people running them - hence the lack of replies.

[F'n_Rover]

i thought offset was the difference from stock where as backspace was total distance from rear of rim ??

i wouldn't say 3" backspace is too radical, stock rover is around 3.5" ???

[ISUZUROVER]

i thought offset was the difference from stock where as backspace was total distance from rear of rim ??

i wouldn't say 3" backspace is too radical, stock rover is around 3.5" ???

NO - OFFSET is the distance between the centreline of the rim and the wheel mounting surface. So a zero offset rim would have the mounting surface in the exact centre of the rim.

BACKSPACING is the measurement from the wheel mounting surface to the inside edge of the rim.

So If you changes your rims from 8" wide to 10" wide, but kept the same offset, you would have rims that go in towards the vehicle 1" further and out towards the outside 1" further.

If however you went from 8" to 10" and kept the same backspacing, your rims would go 2" further out.

If I remember correctly, stock 6" rangie rims had 4.06" backspacing and 7" disco steel rims had 4.76" backspacing.

[F'n_Rover]

learn't something tonight.

but still wondering - why do we need offset details when a backspace measurement explains everything?

[ISUZUROVER]

learn't something tonight.

but still wondering - why do we need offset details when a backspace measurement explains everything?

When you care about decent on-road handling for steer axles, offset is usually the best thing to work with since the general idea is to have the wheel pivoting about the kingpin location (or close to it - makes for best steering feel, lightest steering, and minimal scrub radius). So if you keep offset constant as you change rims then you will retain similar steering and handling characteristics.

But when you fit wider rims, often you have to increase offset in order to make sure the wheel doesn't foul on guards/steering/suspension. Often at the expense of handling/steering performance.

[Jay]

learn't something tonight.

but still wondering - why do we need offset details when a backspace measurement explains everything?

When you care about decent on-road handling for steer axles, offset is usually the best thing to work with since the general idea is to have the wheel pivoting about the kingpin location (or close to it - makes for best steering feel, lightest steering, and minimal scrub radius). So if you keep offset constant as you change rims then you will retain similar steering and handling characteristics.

But when you fit wider rims, often you have to increase offset in order to make sure the wheel doesn't foul on guards/steering/suspension. Often at the expense of handling/steering performance.

BEn

You got it right what I meant. Reason I am considering 3" BS it to get a wider stance. Only issue is having the disc brake naked for me.
I am running an 8" wheel now with 4 1/4" of BS....I will be going with a 10" beadlock wheel and upgrading the shitty rover power steering pump.

What is your fee about the 3" BS? I have already trimmed a lot using the Rangie Spares trimming is no issue for me

[ISUZUROVER]

I recall that Frankenrover on pirate was running with exposed discs and had a few issues. I think it would be difficult to make any sort of disc brake guard that could handle being dragged over rocks.

As Mickrangie said, I would be more worried about the wheelbearings, and also the scrub radius (You will have about 3.3" more offset than a stock disco). But people in the US seem to have gotten away with it. I doubt anyone in OZ would have much experience with wheely like that though (any more than 25mm extra offset per wheel is illegal - though some people do run more).

[HSV Rangie]

I run 80 mm back space on my off road set. 35s.

reversed 7x16 disco wheels.

road whell be fitted with 100mm back space.

Michael.

[Jay]

I run 80 mm back space on my off road set. 35s.

reversed 7x16 disco wheels.

road whell be fitted with 100mm back space.

Michael.

Micheal

You should be running a 3.8" BS...Do you mean 80 mm is you offset (distance from the hub to the outer mounting surface).
Your discs should out nakes. Appreciate some pics showing front steering...Any issues with the bearing and other

[zuffen]

I run 8x15 rims with an additional 2" of offset. The offset was included so the 33x12.5 Mud Terrains would clear the front radius arms.

The discs are exposed and the rears run an additional guard to protect them from ingress of stones etc.

To date (11 years) the guards have not been hit on rocks etc. The guards are starting to crack through metal fatigue but otherwise have been no problem.

The additional offset hasn't made the steering noticably heavier nor made it handle poorly.

I've been thinking of moving up to 10x15 with the same offset. I know they are normally illegal but my car is engineered with the +2" offset now so going to 10's will but me right on the limit.

I'll need aflare kit to cover them.