Brake upgrade

You already have have front ventilated discs plus rear solid discs so that's about the best you can get other than fitting the AMG brakes. I don't see however why you should change the wheels, given that the diameter of your wheels (7.5J x 18 H2 ET 63) and those fitted to the AMG (9.5J x 18 H2 ET 50) is the same so that both allow the same "size" of brake callipers to be fitted.

I am sorry but the only advice I can give you is to spend that two grand or to drive slower.

Cheers,

Custom made Carbon discs perhaps ?

Have to agree with Russ. If the ABS activated, then better brakes are not going to help. If it didn't, I guess you didn't panic enough. Research has apparently shown that even in emergencies most of us do not hit the pedal hard enough....hence brake assist which does. If you didn't actually hit the Nova, what's the problem? Your reaction was a "success".....Don't half get the old adrenalin flowing though, doesn't it? :lol:

Q

Ah, could be that was the problem. Assuming you were not carrying an enormous load in the back, about 85% or more of braking effort takes place on the front end, the abs acting very early to prevent the lightly loaded rears from locking up. Now, if you only have about "two months'" worth of tread left on the front tyres, I am not at all surprised you had a scary time of it.
Strictly speaking, your 463 being permanent four wheel drive, you should endeavour to change all four tyres at once and ensure that they are all of the same make, tread type and size. Your new rear tyres will be significantly larger in diameter than your worn out fronts purely because of the differing tread depth. BFGoodrich tyres are brilliant; very competent off road and long lasting too. I have 235/85R16 Mud Terrains fitted on my G. They suit what I do but I would never trust them at speed on a wet greasy road as with such a knobbly tread, there just isn't enough rubber in contact with the tarmac to keep over two-tonnes of steel pointing in the right direction. They more than make up for it in the chalky mud where I am. If you don't take you machine off-road, I would endorse what KenC said and suggest a road biased tyre such as Goodyear Eagle or similar.

Actually, it seems to me that which ever dealer supplied and fitted your new rear tyres had a duty of care to have pointed all this out to you. :?

Q

I cannot but agree entirely with what Quercus said. I have the same size 235/85R16 BFG but Track Edge this time and find that, although they offer an excellent compromise for off-roading I have to be that extra careful with my speeds around these narrow, wet and greasy country roads that I use mostly. Again, if you are using your G500 with those brilliantly useless (off the road) 18" rims mainly on the road you'd better put some high-speed rubber into them.

Regards,

Well done Q you obviously know your tyres, Scorpions are another good option for road bias tyres.

Try Southam Tyres in Southam Warwickshire they are the BFG Importers

I can see where you are coming from Ian,the same thoughts driffted across my mind, performance is often a number of factors, buI think at this time of the year where braking is concerned allowance needs to be given for traction degradation due to sand / salt on the road.
As regards ABS and tread wear. Tread does not enhance grip on a dry road it reduces it, tread is there to displace water and to cool down the tyre on dry roads at speed.
ABS prevents the wheel locking and in doing so lenghthens the stopping distance, however a locked wheel has the same effect as aquplane the melting rubber forms a fluid surface between the tyre and the road.
In motor sport they don,t have abs ( German for Anti block system) but the drivers train to keep the tyre at 9.999 tenths of friction under braking which is a nats n.... before lock up and actualy lift the pedal as they go deeper into the corner to prevent lock.
Road tyres are a compromise.

Well that's the theory Bill, but you know better then me ('cause you are an old fox, aren't you?) that tyre wear comes normally alongside the aging of the tyre and thus its rubber losses adherence ability so perhaps a worn out tyre with minimum thread has much less grip on a dry road than a brand new one with loads of thread.

Cheers

In fact J ,Tyre compound should remain the same all through the tread depth and its adherence not differ during its useful life until wear bars are exposed, what is often not known is that used or not tyres should be replaced every 3 years because the compound hardens from the effects of UV, the synthetic that is a car tyre looses its plastic properties thru the effects of UV even in cloudy UK, Truck tyres are natural rubber because a synthetic that size would over heat and delaminate.
Treadless tyres are best on a dry road, grooved tyres best in the wet, that is an undisputable fact .ask Mr Alonso. F1 now run on grooved tyres at all times, this was a change brought in to slow them down in the dry, and it works, but clever tyre engineers have now designed a F1 tyre that wears quicly in the early part of the race loosing its grooves leaving a slick tyre to finish when the car is lightest and quickest. Many other facets of tyre,road surface, pressures,vehicle weight, air density, humidity surface temperature, camber, castor, down force et al should be considerd but we don't have time for that when we are going to Tescos.

Fox hunting is now banned.