Can D3 17's fit a D4 (2.7)

**TerryO** · 3rd June 2012, 04:18 PM

Originally Posted by garrycol

Is there a way you can actually reduce the vehicle to the bumpstops to check clearances?

Garry

I have a airbag with a hole in it that you can fit to see what bump stop height is like ...

cheers,
Terry

**Graeme** · 3rd June 2012, 04:45 PM

Originally Posted by TerryO

I have a airbag with a hole in it that you can fit to see what bump stop height is like ...

cheers,
Terry

Wouldn't it be better to poke holes in his own, allowing you to keep your one rather than having to send it back after trying it?

**101RRS** · 3rd June 2012, 04:53 PM

A hole in Terry's bag is better than a hole in my bag

**TerryO** · 3rd June 2012, 05:05 PM

Originally Posted by garrycol

A hole in Terry's bag is better than a hole in my bag

Thats one of the things with old gas bags they have a habit of going down on you when you aren't expecting it. ...

cheers,
Terry

**sniegy** · 3rd June 2012, 05:21 PM

My bad & the 2nd time too . . .
265/70/17 LT

Sent from my iPad using Forum Runner

**gghaggis** · 5th June 2012, 11:43 AM

Disconnecting two height sensors and driving will usually bring the car down to the bump-stops (around 10 ~ 15mm lower than access). Of course, you don't want to drive too far away from a jack/workshop - getting the height sensor rods reconnected at bump-stop height is a bugger of a job!

Cheers,

Gordon

**Graeme** · 5th June 2012, 12:21 PM

Originally Posted by gghaggis

the bump-stops (around 10 ~ 15mm lower than access)

About 50 mm lower than access height on my D4.

**Tombie** · 5th June 2012, 12:38 PM

You could always look at having some blocks made up (urethane perhaps) and having a method of locking them in place (cable ties?)

Then if running oversize and a fault occurs could jack the vehicle up and insert spacers and be able to move..

I may investigate this option as I'm going to 265-70-17s on BMW rims soon.

**gghaggis** · 5th June 2012, 01:04 PM

Graeme,

That's odd - I know there is a bit of variance between individual cars, but that seems a lot. Perhaps the RRS access height is lower?

I measured all my front heights when I installed the EAS emergency kit (from centre-cap to top of wheel-arch) and got:

no air: 390mm
access: 405mm
normal: 462mm
off-road: 511mm

So 15mm difference from bump (no air) to access. Rears gave me 12mm difference. I might try it again to confirm.

Skuilnaam:

At bump stops neither my 265/70R17 (D3) or 285/60R18 (RRS) touch the wheel liner. There's some contact on hard lock at the fronts with the RRS, can't recall for the D3.

Cheers,

Gordon

**Graeme** · 5th June 2012, 05:09 PM

The RRS may have different suspension components to a D3 - even perhaps just the shock length. I don't recall any length difference between D3 and D4 shocks, only slightly different air-spring seat heights. I doubt the D4 suspension geometry changes to front and rear roll centres has any significant impact on bump-stop height.

Multiple bump-stops rubbers/blocks could be stacked on the shock shafts to provide a rubber block style emergency suspension but the shock/airspring assemblies would need to be removed to fit them, so not a quick option. Perhaps they're an option for a holed bag though.

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