Road Disc Brakes- Rotor Choice

Discuss light weight issues concerning road bikes & parts.

Moderator: robbosmans

jlok
Posts: 1453
Joined: Tue Jun 30, 2015 3:30 am

by jlok

Remember SiCCC? Where is it now?
Rikulau V9 DB Custom < BMC TM02 < Litespeed T1sl Disc < Giant Propel Advanced SL Disc 1 < Propel Adv < TCR Adv SL Disc < KTM Revelator Sky < CAAD 12 Disc < Domane S Disc < Alize < CAAD 10

by Weenie


mdeth1313
Moderator
Posts: 2338
Joined: Sat Apr 22, 2006 12:38 am
Location: Dutchess County, NY

by mdeth1313

Yeah, this turned out to be a waste of time. I went with ashima as I asked for 6 bolt suggestions. Amazingly enough, they stop far better than any rim brakes I've ever used.
Speedplay is the devil!

Vjl
Posts: 30
Joined: Wed Mar 16, 2011 7:14 pm

by Vjl

TRP 25 Rotor

jfranci3
Posts: 1107
Joined: Tue Jul 26, 2016 5:21 pm

by jfranci3

For rotors, just remember the floating rotors aren't the same as a car design rotor, which allows for some centering movement to the pads. The bike versions just mean that they are dual materials riveted together. Even the AbolutueBlack 'True" floating rotors don't float, they can only move radially out

Also, the lighter the weight, the worse off the braking capacity per braking event (think series of stops). If you remove weight, you're typically losing heat storage capacity.


Question, despite having TRP Hy/Rd which are self centering, I still get rub when the slightest change occurs to my skewer and from one wheelset to the next. Does anyone make a centerlock shim set? Is there a way to leave tolerance in the lockring?

jlok
Posts: 1453
Joined: Tue Jun 30, 2015 3:30 am

by jlok

jfranci3 wrote:The bike versions just mean that they are dual materials riveted together.

This?
Image
Rikulau V9 DB Custom < BMC TM02 < Litespeed T1sl Disc < Giant Propel Advanced SL Disc 1 < Propel Adv < TCR Adv SL Disc < KTM Revelator Sky < CAAD 12 Disc < Domane S Disc < Alize < CAAD 10

jfranci3
Posts: 1107
Joined: Tue Jul 26, 2016 5:21 pm

by jfranci3

Yep. "Custom steel braking surface riveted to an aluminium central carrier" http://www.hopetech.com/product/disc-rotors/#tech

thumper88
Posts: 151
Joined: Tue Mar 13, 2012 7:27 pm

by thumper88

Have you been able to tell how the floaters respond, if at all, to heavy mud buildup?

jfranci3
Posts: 1107
Joined: Tue Jul 26, 2016 5:21 pm

by jfranci3

Why would mud be an issue?

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ms6073
Posts: 3363
Joined: Fri Jul 23, 2004 8:24 pm
Location: Houston, Texas

by ms6073

jfranci3 wrote:Why would mud be an issue?

Based on experience racing cyclocross, the more slots/vents in the braking surface of the rotor, then the more likely they are to accumulate mud which then acts like an abrasive, drastically accelerating pad wear. While not really a suitable comparison now that there is wide spread availability of hydraulic calipers for road and cross, at the CX Masters worlds in 2013, I raced with TRP Spyre mechanical calipers and wore through a brand new set of Metallic pads during nearly 50-minutes of racing in heavy mud, slush, and ice. A year later, I wore through another set of pads during a week of touring with he wife, riding along the gravel/mixed surfaces of the Great Allegheny Passage where we got rain and mud on a regular basis. That as one of the driving factor behind my jumping on board the Kickstarter campaign for Silicon Carbide-Ceramic-Carbon (SiCCC) which featured solid braking surfaces.
Last edited by ms6073 on Fri Sep 15, 2017 5:53 pm, edited 1 time in total.
- Michael

jfranci3
Posts: 1107
Joined: Tue Jul 26, 2016 5:21 pm

by jfranci3

You mean small holes manage mud better or large slots manage mud better? You're going to need some relief to act as a scraper. Obviously mud varies quite a bit.

moyboy
Posts: 485
Joined: Thu Aug 18, 2016 12:19 am

by moyboy

Running RT-99 on mine too.

commendatore
Posts: 268
Joined: Mon Dec 30, 2013 1:51 am
Location: North Carolina

by commendatore

For muddy conditions I've heard of people swapping to an avid clean sweep rotor to prevent pad wear associated with picking up a lot of mud

MichaelB
Posts: 805
Joined: Tue Apr 22, 2008 4:31 am

by MichaelB

For road use, I've tried some different types (6 bolt and centrelock) - including Avid HSX, SRAM Centerline, Hayes V7 & V5 and Ice-Tech over the last 6 years. This includes local rides in Aus as well as a 2 week alpine ride in the Dolomites, Lake Como and in France.

For 6 bolt, I think the RT-86 Ice-Tech are the best hands down. SRAM Centreline & Hayes were good, but not quite up to the same std.

MoPho
Posts: 673
Joined: Sun Jul 10, 2011 7:48 pm
Location: NorCal

by MoPho

I haven't had much luck with the ice-tech rotors. For some reason I was getting an issue where the pads were pulsing and scraping over the vent cut-outs on the rotors as I got below 20mph under harder braking. Changed pads and it would go away for a little while, then come back. Same if I changed rotors and/or cleaned and sanded the pads. Tried both RT99 and RT81 140mm and 160mm. Same thing every time. Seems I am the only one with this issue as none of the other disc guys around here are experiencing it with the ice tech.
Now trying the Sram Centerline and the issue has gone away seemingly because of the shape of the venting, but not sure yet if the braking is as good with them. Already had a hard stop from 40-0 mph that overheated the rotors, may have been an anomaly.
:noidea:



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justaute
Posts: 281
Joined: Fri Jan 04, 2013 7:17 pm
Location: UT/TX/PA, USA

by justaute

FWIW...it may not be the rotor. What about your caliper? Not sure which caliper you are using, but the pistons of some calipers don't retract very well. I've been having issues with my front RS685 caliper. Bled the brake and it is now better, but not quite perfect.


MoPho wrote:I haven't had much luck with the ice-tech rotors. For some reason I was getting an issue where the pads were pulsing and scraping over the vent cut-outs on the rotors as I got below 20mph under harder braking. Changed pads and it would go away for a little while, then come back. Same if I changed rotors and/or cleaned and sanded the pads. Tried both RT99 and RT81 140mm and 160mm. Same thing every time. Seems I am the only one with this issue as none of the other disc guys around here are experiencing it with the ice tech.
Now trying the Sram Centerline and the issue has gone away seemingly because of the shape of the venting, but not sure yet if the braking is as good with them. Already had a hard stop from 40-0 mph that overheated the rotors, may have been an anomaly.
:noidea:



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by Weenie


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