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Old 04-18-2017, 03:26 PM   #1 (permalink)
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Default FS: Brand New OEM Rear Brake Caliper + Pads

New OEM Rear Brake Caliper plus pads. Just paid $500 plus shipping.....
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Old 04-18-2017, 11:11 PM   #2 (permalink)
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Sounds reasonably cheap.

Does the Karma ever need them? My brakes are looking almost unused...
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Old 04-19-2017, 05:54 AM   #3 (permalink)
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Yes, brakes are hardly ever used. Bought more as a preventative measure....
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Old 04-19-2017, 07:45 PM   #4 (permalink)
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I haven't seen a set a brake pads ever replaced yet cars with 60K still look new
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Old 04-20-2017, 08:40 PM   #5 (permalink)
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Did one set of rear at 88k miles, fronts on the car still 50%!
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Old 04-21-2017, 07:04 PM   #6 (permalink)
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I wonder if they could have done away with friction brakes completely if you could apply reverse power to the motors to slow the car down to a full stop. This would be going beyond regen and actually applying power to the motors but in the reverse direction (like pedaling backwards on a bike). Would still need friction brakes for the front wheels and for parking, but could save a lot of weight in the back.
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Old 04-22-2017, 06:42 AM   #7 (permalink)
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Default FS: Brand New OEM Rear Brake Caliper + Pads

Quote:
Originally Posted by Fabulist View Post
I wonder if they could have done away with friction brakes completely if you could apply reverse power to the motors to slow the car down to a full stop. This would be going beyond regen and actually applying power to the motors but in the reverse direction (like pedaling backwards on a bike). Would still need friction brakes for the front wheels and for parking, but could save a lot of weight in the back.

I also had this in mind, but I thought this would raise the amperes in the motors dramatically... requiring additional cooling for the motors...

And I won't think of having more complex motors and additional torque on the gears, which we know of being a little bit fragile 😕

And having 'real' brakes might be a security requirement... think of going into 'reduced performance' at 120mph 🏥
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Old 04-22-2017, 02:31 PM   #8 (permalink)
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Quote:
Originally Posted by Stefan View Post
I also had this in mind, but I thought this would raise the amperes in the motors dramatically... requiring additional cooling for the motors...

And I won't think of having more complex motors and additional torque on the gears, which we know of being a little bit fragile 😕

And having 'real' brakes might be a security requirement... think of going into 'reduced performance' at 120mph 🏥
You are probably right, particularly on the last point. I think safety regulations around the world all assume that a vehicle has friction braking on all wheels at this point and it would take a huge effort to update the laws and regulations to make those optional. On the other hand, currently all laws and regulations all require, or more accurately assume, that there is a human being in control of the vehicle at all times, and we see which way that is headed. The option of using EM braking instead of friction barking is probably a lot less revolutionary.
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