Thread: Legality of aftermarket 17" rims for D3

They sound promising, although at 180GBP each from Rallysport.com plus shipping (esp air freight) plus import duty could make a set of 5 a bit expensive.

Hmmm, a lot of conflicting statements flying around the internet re whether the Compomotive rims even fit the RRS SC. So far the story seems to be:

1. The Compomotive PD1880 will only fit the RRS SC if you remove the anti-vibration block on the rear of the caliper and either:
a) replace it with a reshaped one (so it doesn't stick out)
b) re-attach it upside-down.

2. There is a Compomotive MD model (880?) that will clear, but is not rated for the weight
3. The Advanti Photon 8x18 will also fit, if you do either of the mods in 1) above.

No one has the exact dimensions of the D4 3.0 caliper vs the RRS SC, so I guess the only thing to do is wander down and measure them. Hi ho .........

Cheers,

Gordon

If the brakes require any modification at all to fit 18s (even "doesn't change anything" mods), then consider the conversation you may need to have with your insurer, Land Rover for warranty, or the police. Not saying don't do it, each to their own, just consider the consequences.

Originally Posted by rmp

If the brakes require any modification at all to fit 18s (even "doesn't change anything" mods), then consider the conversation you may need to have with your insurer, Land Rover for warranty, or the police. Not saying don't do it, each to their own, just consider the consequences.

Yes, probably a race/competition mod only (although note that Bowler do it for their road cars - the Nemesis EXR). But I'll keep checking - if LR redesigned the anti-vibration block for the D4, it may not need modification, as it is the only thing that prevents these rims from fitting (and the original design is pretty foolish - it only relies on the mass/momentum attached to the caliper, not the precise shape, so why make it stick out so much??).

Cheers,

Gordon

The 3.0/5.0 D4 doesn't use Brembo front callipers, but a new 2-piston sliding calliper. Thus it shouldn't protrude out as far from the disc but could be larger in diameter although the release info states that LR have reduced the size of the brake package compared with the Brembo setup on the RRS.

A new, larger brake system has been introduced along with the new engines, to cater
for the Discovery 4's enhanced performance and to improve braking feel.
This new system is inspired by the four-piston, opposed-calliper performance system
used on the Range Rover Sport. It employs a 360mm ventilated front disc with a new,
cast iron twin-piston sliding calliper – which serves to reduce the size of the front brake
package while preserving its stiffness, which in turn helps achieve excellent pedal feel.

Originally Posted by Graeme

The 3.0/5.0 D4 doesn't use Brembo front callipers, but a new 2-piston sliding calliper. Thus it shouldn't protrude out as far from the disc but could be larger in diameter although the release info states that LR have reduced the size of the brake package compared with the Brembo setup on the RRS.

I'll have a demo D4 and an old RRS SC to compare with next week - I've also got one of the Avanti Photon rims, so we'll see ....

Cheers,

Gordon

Update on the Performance rims. They have been redesigned so that the nut engages for the correct length by redesigning the hole in the rim using the existing nuts. A quick visual inspection is all I've managed so far, but shortly I will be able to verify this. Other specs remain unchanged.

Brakes of the 3.0 D4 are smaller in overall dia than the old Brembos on S/C and TDV8 RRS. Let us know what you find, gghaggis.

With the right offset, even a 17" might fit, would be worth trying 17" steel wheels too.