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Aero Disk Brakes

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Aero Disk Brakes

Old 06-25-19, 04:45 PM
  #1  
Elvo
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Aero Disk Brakes



PARLEE Cycles | RZ7
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Old 06-25-19, 07:04 PM
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Yeah, a few newer models from other manufacturers have aero tabs for the front calipers. I haven't seen anything as extensive as what Parlee is showing for the rear, though I have to wonder how that'll affect heat dissipation, which Shimano seems to be big on.
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Old 06-25-19, 07:17 PM
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Kinda like the TTir tribike I currently have... I think it looks nice and tidy... disc calipers are not the prettiest things in the world.
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Old 06-25-19, 07:29 PM
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I have an RZ7 (#39 built of the first batch of 100).

I haven’t discerned any heat buildup or degradation of brake performance, but I also haven’t done any long descents requiring sustained braking. Time will tell.

The fairings certainly get the most comments on my local rides.
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Old 06-25-19, 09:17 PM
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Originally Posted by WhyFi View Post
Yeah, a few newer models from other manufacturers have aero tabs for the front calipers. I haven't seen anything as extensive as what Parlee is showing for the rear, though I have to wonder how that'll affect heat dissipation, which Shimano seems to be big on.
I'm big for a cyclist, and I really love mountain scenery. Heat dissipation is important to me, more than aero. Everybody else competing for that segment has disc brakes too.

Haven't read the link yet. Are these actually more aero, or do they just look the part?
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Old 06-25-19, 11:51 PM
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DOT 5.1 brake fluid boiling point is 260C. Is heat dissipation really an issue?
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Old 06-26-19, 12:23 AM
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Dean V
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Originally Posted by UmneyDurak View Post
DOT 5.1 brake fluid boiling point is 260C. Is heat dissipation really an issue?
Shimano doesn't use DOT fluid.
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Old 06-26-19, 05:45 AM
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Originally Posted by UmneyDurak View Post
Is heat dissipation really an issue?
Seeing as Shimano has cooling fins on their all of their higher-end rotors and calipers, it would appear so.
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Old 06-26-19, 07:36 AM
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Originally Posted by Dean V View Post
Shimano doesn't use DOT fluid.
OK, but looks like according to shimano their mineral oil has even higher boiling point: https://bike.shimano.com/en-US/infor...ke-fluids.html

Originally Posted by WhyFi View Post
Seeing as Shimano has cooling fins on their all of their higher-end rotors and calipers, it would appear so.
Could be just added as a precaution in case someone never changes the fluids and likes to ride down long descends dragging their brakes.
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Old 06-26-19, 09:20 PM
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Originally Posted by UmneyDurak View Post
DOT 5.1 brake fluid boiling point is 260C. Is heat dissipation really an issue?
Yes, fat people like myself on very steep descents can dump a lot of heat into brakes. I had leidenfrost on my fronts descending Pikes Peak last year. That is > 193C. If I had water contamination the brakes would have failed. As it was they were quite loud and pissy.
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Old 06-26-19, 10:41 PM
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Originally Posted by UmneyDurak View Post
DOT 5.1 brake fluid boiling point is 260C. Is heat dissipation really an issue?
I overheated my fluid to the point where the brake lever became an on/off switch until I bled them. 3k descent in the desert on a gravel road. I was going too fast and hit a long washboard.

That was on SRAM, I'm using Shimano now which has been better to me.
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