> Actually any reasonably good modern car should be able to manage 1g 
> braking

Not consistently throughout a whole braking manoeuvre without great 
care in design. Being able to lock up the wheels is only the first 
step. Stopping them doing it is the second and harder step. Well 
designed ABS helps. Without such weight transfer between wheels will 
leave the lightened wheel locking and the one with more weight on it 
not braking as hard as it could.

        RM

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