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What's with the two calipers on each rear wheel?

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34K views 11 replies 7 participants last post by  MacGeek  
#1 ·
Assuming the second caliper is for the e-brake system, but why? It's a bit confusing to me for a few reasons:

1) why can't it be incorporated like almost every other car?

2) am I the only one that thinks it looks "clunky?"

3) if the engineers are so weight conscious, why add seemingly unnecessary weight where it hurts most (un-sprung weight)?

Image


Does it just have to do with carbon ceramic brakes? Is it because there is going to be an electronic parking brake? I'm sure other manufacturers have managed to do all of this with one caliper per wheel.

So what gives?
 
Discussion starter · #4 ·
Thanks. There must be a good reason for it, but it escapes me. Might simply have to do with multi-piston calipers. I'm familiar with the drum-in-hat setups... and my $20,000 Pontiac Solstice can manage an e-brake and hydraulic caliper all in one, but the rears are single pot.