What's that burning smell?
#1
Senior Member
Thread Starter
Join Date: May 2007
Location: Santa Cruz Mountains
Posts: 6,169
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
What's that burning smell?
It's from my brakes when using my race wheels. Smells like burning car brakes, or a clutch.
Swisstop yellow pads on Reynolds carbon rims.
Has anyone else noticed this? Is there anything to do? Better braking wouldn't hurt either.
Swisstop yellow pads on Reynolds carbon rims.
Has anyone else noticed this? Is there anything to do? Better braking wouldn't hurt either.
#2
Senior Member
Usually when I smell that smell I start looking for a way out. It usually means guys in front are in the process of, or about to, stack it up.
Since you're trading massive amounts of kinetic energy for heat, something's got to burn a bit. Since carbon rims don't absorb heat, there's more heat to burn stuff. I dunno the science so I don't know if the rims or pads are making the smell. I'm guessing pads.
I used Swisstop yellows on Reynolds for a couple years and found them to be perfectly fine. I was actually shocked the first time I didn't use the yellows in the rain - I had pretty much no brakes. I also used Koolstop black pads on alum rims - not as nice as yellows/Reynolds, and in the rain the black/alum combo didn't work that well either.
cdr
Since you're trading massive amounts of kinetic energy for heat, something's got to burn a bit. Since carbon rims don't absorb heat, there's more heat to burn stuff. I dunno the science so I don't know if the rims or pads are making the smell. I'm guessing pads.
I used Swisstop yellows on Reynolds for a couple years and found them to be perfectly fine. I was actually shocked the first time I didn't use the yellows in the rain - I had pretty much no brakes. I also used Koolstop black pads on alum rims - not as nice as yellows/Reynolds, and in the rain the black/alum combo didn't work that well either.
cdr
#5
Elite Fred
Join Date: Aug 2005
Location: Edge City
Posts: 10,945
Bikes: 2009 Spooky (cracked frame), 2006 Curtlo, 2002 Lemond (current race bike) Zurich, 1987 Serotta Colorado, 1986 Cannondale for commuting, a 1984 Cannondale on loan to my son
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
Liked 42 Times
in
19 Posts
If that smell isn't the souls of other racers that you have just torched, then it is not a good thing.
#6
Senior Member
Thread Starter
Join Date: May 2007
Location: Santa Cruz Mountains
Posts: 6,169
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
The smell could have been from someone else's brakes but it seemed like it was from mine. Today's race had some steep technical downhills featuring sand and gravel. I'm sure I could have braked less especially on the first lap but my skill level doesn't allow me to ride it with no braking.
#7
Senior Member
Join Date: Mar 2009
Location: Colorado
Posts: 9,458
Bikes: Something Canadian, something Italian, something American, and something German
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 64 Post(s)
Likes: 0
Liked 16 Times
in
10 Posts
I smelled that today, but with aluminum rims and kool stops. I wanted to see how fast i could go on a steep downhill, hit 46, but I left minimal room for stopping. Trying to stop on a 15% grade in 50 feet without going OTB is difficult. Anyway, it squealed and smelled burny.
#8
Banned
Join Date: Sep 2005
Location: Santa Barbara, CA
Posts: 28,387
Bikes: Specialized Tarmac SL2, Specialized Tarmac SL, Giant TCR Composite, Specialized StumpJumper Expert HT
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
I've smelled it any time there is a pack with heavy braking. I think everyone's give it off somewhat, and softer compounds for carbon rims moreso. The pack just amplifies the amount of braking and you notice the smell more because there are more people.
#9
gmt
Join Date: Sep 2008
Location: Binghamton, NY
Posts: 12,509
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
pads.
they are consumables.
friction -- heat --- etc.
the rim acts as a heat sink since it is much larger and will take much more time to heat up.
they are consumables.
friction -- heat --- etc.
the rim acts as a heat sink since it is much larger and will take much more time to heat up.
Thread
Thread Starter
Forum
Replies
Last Post
wernst
Bicycle Mechanics
13
05-17-11 07:18 AM