Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

User Tag List

Reply
 
Thread Tools Search this Thread
Old 02-14-07, 10:02 AM   #1
myfish
Junior Member
Thread Starter
 
Join Date: Jan 2007
Bikes:
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Aluminium embedded in brake blocks ?

ok, what causes it, bad rims or brake blocks/pads that are too abrasive, or both.
Bad weather and rain is obviously a factor here, but on my geared bikes i have not experienced this problem.
I did a check on the bike after a really wet ride, stripped out the wheels etc and noticed large deposits of rim aluminum embedded in the blocks and aluminium shards deposited around the calipers.

When i say wet, i mean WET ride. I emptied maybe 1/4 pint of water out of each rim after deflating the tyres and removing part of the tyre.

so, what can be done to combat this ?
would ceramic rims be immune ?
would softer pads be better ?

or, is it just crap rims ?
myfish is offline   Reply With Quote
Old 02-14-07, 10:06 AM   #2
soyboy
Senior Member
 
soyboy's Avatar
 
Join Date: Aug 2005
Location: brooklyn
Bikes: raleigh gran prix converted to fixed
Posts: 939
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
sounds like crap rims, i've never seen a rim that was rough enough to leave shards in your brake pads
soyboy is offline   Reply With Quote
Old 02-14-07, 10:11 AM   #3
Landgolier
THIS SPACE FOR RENT
 
Join Date: Jan 2006
Bikes:
Posts: 2,849
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
sand or other crap gets in your pads, which galls up Al, which gets hot and galls up more Al. Rim quality has very little to do with it unless your rims are totally junk.
Landgolier is offline   Reply With Quote
Old 02-14-07, 10:19 AM   #4
AfterThisNap
Taking "s" outta "Fast"
 
AfterThisNap's Avatar
 
Join Date: Dec 2005
Location: Zoo York City
Bikes:
Posts: 1,989
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Shimano pads were making glitter out of my $1200 ksyriums, rain or shine. I've since switched to kool-stop salmon pads, even in dry weather, and have never looked back. No shredded rims, and great stopping in any weather. Plus, they have that triangular lip that scrapes muck off the rim before it makes full contact, so it's automatically toed in.


AfterThisNap is offline   Reply With Quote
Old 02-14-07, 10:26 AM   #5
LóFarkas
LF for the accentdeprived
 
Join Date: May 2005
Location: Budapest, Hungary
Bikes:
Posts: 3,549
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I vote for ****ty pads as well. Had one do this, switched to a better pad and the problem went away.
LóFarkas is offline   Reply With Quote
Old 02-14-07, 10:47 AM   #6
Suburbia
headed for mtb country
 
Suburbia's Avatar
 
Join Date: Jul 2006
Location: new york
Bikes:
Posts: 70
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
yes, low-quality pads will affect it slightly, but it happens with all rims.

during this time of year we're doing a lot of complete overhauls on high-end bikes and every one involves taking off the brake pads, picking the tiny specks of aluminum out of them, cleaning them, then sanding them even (this is all if they're worth keeping).

just keep your rims and pads clean and inspect both every once in a while. not much more that you can do.
Suburbia is offline   Reply With Quote
Old 02-14-07, 10:58 AM   #7
isotopesope
shoot up or shut up.
 
isotopesope's Avatar
 
Join Date: Nov 2003
Location: colorado springs, co
Bikes: yes please.
Posts: 1,961
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
aside from crappy pads, some rims are worse than others with this problem.
isotopesope is offline   Reply With Quote
Old 02-14-07, 11:12 AM   #8
myfish
Junior Member
Thread Starter
 
Join Date: Jan 2007
Bikes:
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the quick replies guys.
Because I'm sorta new to this fixed game, it seemed i was pretty heavy on the brakes for the first 100 or so miles. Well, I could have put it down to that, and i did the first time, but since doing the 500th mile or so, possibly more, I know i have eased up on the pads, so I guess its probably a combination of whats being suggested here.

I'm going to sand them flat though, something i didn't think to do, a good tip that.
Also, I'm going to try different blocks too to see i that makes any change.

I still might go with ceramic mavic rims and high quality blocks on some good hubs. I know that the extra bling is pointless for wet and wintery rides, but it sure seems practical.

Just need a damn good UK wheelbuilder to assemble em.

But, for now, great advice, I'm grateful for it. Thanks.
myfish is offline   Reply With Quote
Old 02-14-07, 11:25 AM   #9
Grasschopper
He drop me
 
Grasschopper's Avatar
 
Join Date: Jul 2004
Location: Central PA
Bikes: '03 Marin Mill Valley, '06 Cannondale Rush, '02 Eddy Merckx Corsa 0.1, '07 Bottecchia Euro Sprint Tour Comp Elite Pro 1000
Posts: 11,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I clean the pads on my bikes every 100 miles or so of use. I have had DT Swiss RR1.1s, Salsa DelgadoXs Mavic Open Pros and others all leave small pcs of metal in the pads...just go in there with an exacto or fine tweezers and dig them out. Plus clean your rims.
__________________
The views expressed by this poster do not reflect the views of BikeForums.net.
Grasschopper is offline   Reply With Quote
Old 02-27-07, 09:43 PM   #10
AfterThisNap
Taking "s" outta "Fast"
 
AfterThisNap's Avatar
 
Join Date: Dec 2005
Location: Zoo York City
Bikes:
Posts: 1,989
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
really, salmon pads will cure all of these ills. No more sanding/cleaning/worry of ceramic rims (which will eat pads soooooo fast)
AfterThisNap is offline   Reply With Quote
Old 02-28-07, 11:33 AM   #11
Snordalisk
Senior Member
 
Snordalisk's Avatar
 
Join Date: Nov 2003
Location: Worcester, MA
Bikes: 1977 Raleigh Professional, 1997 Milano 3v, 2004 Surly Karate Monkey, 2007 Surly Crosscheck, 1984 Hutch Pro Racer
Posts: 129
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Certain pads are infamous for this, namely older Campagnolo and certain flavors of shimano pads. Here's a good article on the Shimano pads:

http://www.chainreaction.com/brakeshoes.htm

Quote:
Originally Posted by Suburbia
just keep your rims and pads clean and inspect both every once in a while. not much more that you can do.
There's not much more that you can do except replace them with a better designed brake pad. You can guess which ones I'm going to recommend.
Snordalisk is offline   Reply With Quote
Old 02-28-07, 12:09 PM   #12
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Kool stops and we're done.
operator is offline   Reply With Quote
Old 02-28-07, 12:44 PM   #13
Fixxxie
Strange As Angels
 
Fixxxie's Avatar
 
Join Date: Nov 2006
Location: Longmont, CO
Bikes:
Posts: 465
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
+1 on the kool-stop
Fixxxie is offline   Reply With Quote
Old 02-28-07, 01:31 PM   #14
veggiemafia
Triathlon = Eat/Bike/Nap
 
veggiemafia's Avatar
 
Join Date: Sep 2006
Location: Pixxxburgh, PA
Bikes:
Posts: 1,100
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
veggiemafia is offline   Reply With Quote
Old 02-28-07, 01:35 PM   #15
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Chinook salmon FTW!
operator is offline   Reply With Quote
Old 02-28-07, 05:36 PM   #16
myfish
Junior Member
Thread Starter
 
Join Date: Jan 2007
Bikes:
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've just ordered some.
myfish is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 02:08 AM.