Thread: Rotor material?
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Old October 7th 17, 04:29 PM posted to rec.bicycles.tech
AMuzi
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Default Rotor material?

On 10/6/2017 6:37 PM, Sir Ridesalot wrote:
On Friday, October 6, 2017 at 6:42:43 PM UTC-4, AMuzi wrote:
On 10/6/2017 5:22 PM, Joerg wrote:
On 2017-10-06 06:51, wrote:
On Thursday, October 5, 2017 at 6:37:10 PM UTC-7, James
wrote:
On 06/10/17 09:41, jbeattie wrote:


All one piece rotors I know of are SS, although you can
buy CF
rotors. Magura (and I think Avid) makes thick rotors
(2mm) that
are supposed to be good at shedding heat, but I don't
know of
anyone who makes them thicker than that. You'll have to
do some
detective work.



I wouldn't have guessed that slightly thicker rotors
would be
appreciably better at "shedding heat".


It would also be better if they didn't have so much material
cut out for the weight weenies. So far I haven't been able
to find a rotor that is completely solid or at least towards
the center. Like motor vehicle rotors are.


On MTB's on difficult descents the rotors are almost
red-hot. Since
I've never seen rims that hot I can only assume that the
disks allow
you to hang it out a lot further.


Oh yeah.

https://www.youtube.com/watch?v=2S1KoZnIjbg

The guy should reverse the skewer. Not good to have the
release where the rotor is.


When I was young, The Ancients locked QR skewers randomly,
with many Italians on the right, most French left. Fashion
moved to nearly all left around 1970. Through at least 1973
I was uncrating new bikes with skewer handle right side
(Garlatti, Cinelli) What difference could it make, aside
from rider's personal convenience/opinion/fashion?

(my beef is skewers clamped down hard over a fork blade so I
can't get a finger under them)



Easier for wheel replacement during a big race?


In theory maybe but I remove and reinstall wheels all day
long. Yes, you can slip something under it and take care not
to scratch the finish but what's better about that? Slow
Release is not a feature.

p.s. Almost all skewers need lubrication. They are
frequently sticky binding and inefficient, giving low
clamping force with firm hand pressure.



--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


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