Q about design of rear brake piston

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06-06-2003, 09:53 PM

StygianMax

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Q about design of rear brake piston

Okay, this question has boggled my mind for a while. Why is the rear piston designed to turn as if it's threaded when the front one isn't? What's the functional purpose behind that?

06-06-2003, 09:58 PM

Naujik

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Re: Q about design of rear brake piston

Quote:

Originally posted by StygianMax
Okay, this question has boggled my mind for a while. Why is the rear piston designed to turn as if it's threaded when the front one isn't? What's the functional purpose behind that?

I think it has something to do with the ebrake lever.. the lever I'm talking about is the one where the cable attaches to the caliper itself.

When you pull that lever as if the were using the ebrake, you'll see it pump the piston outwards. So it doesn't require any brake line pressure.

I guess that's how it works as an Emergency Brake.. It shouldn't really fail unless your ebrake cable breaks.

This is just a guess from 10 hours of playing with the brake assembly.. Heh.