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


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 01-02-10, 07:19 PM   #1
Caad 8
Cat-5-O-Meter: Training
Thread Starter
 
Caad 8's Avatar
 
Join Date: Sep 2009
Location: California
Bikes: Cannondale Caad 8
Posts: 891
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Some how I managed to lose

I lost this piece

Does anyone know how I would go about finding a replacement? I lost the black piece. It's for a shimano crank arm.
Caad 8 is offline   Reply With Quote
Old 01-02-10, 07:21 PM   #2
10 Wheels
Galveston County Texas
 
10 Wheels's Avatar
 
Join Date: Nov 2007
Location: In The Wind
Bikes: 2010 Expedition, 03 GTO
Posts: 30,115
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 399 Post(s)
$5 bucks at your LBS.
They may have to order one.
__________________
[SIZE=1][B]What I like about Texas[/B]
http://www.youtube.com/watch?v=PGukLuXzH1E

Set F1re To The Ra1n ( NY Night Rain Ride)
http://www.youtube.com/watch?v=W7jfcWEkSrI
10 Wheels is offline   Reply With Quote
Old 01-02-10, 07:23 PM   #3
mechBgon
Senior Member
 
mechBgon's Avatar
 
Join Date: Jul 2002
Bikes:
Posts: 6,957
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Your local bike shop probably has one. What crank do you have?
mechBgon is offline   Reply With Quote
Old 01-02-10, 09:09 PM   #4
Caad 8
Cat-5-O-Meter: Training
Thread Starter
 
Caad 8's Avatar
 
Join Date: Sep 2009
Location: California
Bikes: Cannondale Caad 8
Posts: 891
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by mechBgon View Post
Your local bike shop probably has one. What crank do you have?
Shimano Ultegra triple.
Caad 8 is offline   Reply With Quote
Old 01-02-10, 09:10 PM   #5
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)
Quote:
Originally Posted by Caad 8 View Post
Shimano Ultegra triple.
Make sure you get the right cap. There are 2 different ones.
operator is offline   Reply With Quote
Old 01-03-10, 02:28 AM   #6
bigvegan
Senior Member
 
bigvegan's Avatar
 
Join Date: Feb 2009
Bikes:
Posts: 659
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Is that the dust cap? Your bike will be perfectly safe to ride without it. If you ride through puddles / sand / snow, it's handy to have, but otherwise, as long as you clean your bike once in a while, you'll be fine.
bigvegan is offline   Reply With Quote
Old 01-03-10, 02:35 AM   #7
Panthers007
Great State of Varmint
 
Panthers007's Avatar
 
Join Date: Sep 2008
Location: Dante's Third Ring
Bikes:
Posts: 7,479
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Caad 8 View Post
Shimano Ultegra triple.
And make sure you get a Shimano tool to torque it onto the Ultegra triple. It requires somewhere around 8 inch-pounds. Getting the shop to do it will be cheaper than the tool. Two Methods? Choose #2.

bigvegan" it's not a 'dust-cap. It sets the preload on the cranks. THEN it's a dust cap.
Panthers007 is offline   Reply With Quote
Old 01-03-10, 06:21 AM   #8
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)
Quote:
Originally Posted by Panthers007 View Post
And make sure you get a Shimano tool to torque it onto the Ultegra triple. It requires somewhere around 8 inch-pounds. Getting the shop to do it will be cheaper than the tool. Two Methods? Choose #2.

bigvegan" it's not a 'dust-cap. It sets the preload on the cranks. THEN it's a dust cap.
It also serves as a crank retention in case the actual crankarm bolts come completely loose.
operator is offline   Reply With Quote
Old 01-03-10, 10:32 AM   #9
Tunnelrat81
Senior Member
 
Tunnelrat81's Avatar
 
Join Date: Jun 2006
Bikes:
Posts: 1,372
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Quote:
Originally Posted by bigvegan View Post
Is that the dust cap? Your bike will be perfectly safe to ride without it. If you ride through puddles / sand / snow, it's handy to have, but otherwise, as long as you clean your bike once in a while, you'll be fine.

I believe this is wrong. This part is to your crank arms what your stem cap is to your stems adjustment. It's the "bolt" that sets the tension before you tighten up your pinch bolts. So theoretically once the pinch bolts are tight, this part isn't important....but in reality these Ultegra cranksets come loose under normal use, so this part is absolutely necessary in order to hand tighten the "bit" of tension to the BB bearings before tightening the NDS crank arm onto Crank spindle.

-Jeremy
Tunnelrat81 is offline   Reply With Quote
Old 01-03-10, 10:57 AM   #10
Bianchigirll 
Bianchi Goddess
 
Bianchigirll's Avatar
 
Join Date: Apr 2009
Location: Camp Hill, PA
Bikes: Too many to list here check my signature.
Posts: 22,656
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 87 Post(s)
this is one of those times when a good relationship with your bike shop can really pay off.
__________________
Bianchis '87 Sport SX, '90 Proto, '90 Campione del Fausto Giamondi Specialisma Italiano Mundo, '91 Boarala 'cross, '93 Project 3, '86 Volpe, '97 Ti Megatube, , '90 something Vento 603,

Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '09 Motobecane SOLD, '?? Jane Doe (still on the drawing board), '90ish Haro Escape
Bianchigirll is offline   Reply With Quote
Old 01-03-10, 01:07 PM   #11
mechBgon
Senior Member
 
mechBgon's Avatar
 
Join Date: Jul 2002
Bikes:
Posts: 6,957
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Tunnelrat81 View Post
but in reality these Ultegra cranksets come loose under normal use
I haven't noticed that on our customers' HT-II bikes, whether road or mountain. Where'd you hear this? Maybe you're thinking of some other brand of crankset... when I was working at a Specialized dealership, we had quite a few Allez owners walk in with their left crankarm in their hand. What were those... FSA or Sugino, I believe.


Anyway, Caad 8, here's your item if you need to buy one online: http://aebike.com/product/ultegra-fc...r2756-qc30.htm

Last edited by mechBgon; 01-03-10 at 01:10 PM.
mechBgon is offline   Reply With Quote
Old 01-03-10, 02:04 PM   #12
Panthers007
Great State of Varmint
 
Panthers007's Avatar
 
Join Date: Sep 2008
Location: Dante's Third Ring
Bikes:
Posts: 7,479
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
My Ultegra triple hasn't come loose. And I ride the tar out of it. Very nice crankset. Very obnoxious making the bloody cap proprietary so most home-mechanics (most) have to buy their stupid tool.
Panthers007 is offline   Reply With Quote
Old 01-03-10, 02:10 PM   #13
Tunnelrat81
Senior Member
 
Tunnelrat81's Avatar
 
Join Date: Jun 2006
Bikes:
Posts: 1,372
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Quote:
Originally Posted by mechBgon View Post
I haven't noticed that on our customers' HT-II bikes, whether road or mountain. Where'd you hear this? Maybe you're thinking of some other brand of crankset... when I was working at a Specialized dealership, we had quite a few Allez owners walk in with their left crankarm in their hand. What were those... FSA or Sugino, I believe.


Anyway, Caad 8, here's your item if you need to buy one online: http://aebike.com/product/ultegra-fc...r2756-qc30.htm

I own an Ultegra 10 road bike, and have for 3.5 years. I periodically have to removed the BB cups to grease and re-torque both the cups and the crank arms to get rid of little creaks and such. So my experience is first hand. Even if it's not technically the crank arm that's loose....but instead the BB Cups...You still have to remove the crank arms first...which means you need that cap to reinstall them at proper tension. I've been told by at least one LBS that this is typical. I've even heard a mechanic say that they have better luck with Ultegra 9 BB/cranksets staying torqued than with the 10 speed external cups. I can't comment on that claim though as I have no personal experience.

-Jeremy
Tunnelrat81 is offline   Reply With Quote
Old 01-03-10, 02:13 PM   #14
Tunnelrat81
Senior Member
 
Tunnelrat81's Avatar
 
Join Date: Jun 2006
Bikes:
Posts: 1,372
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Quote:
Originally Posted by Panthers007 View Post
My Ultegra triple hasn't come loose. And I ride the tar out of it. Very nice crankset. Very obnoxious making the bloody cap proprietary so most home-mechanics (most) have to buy their stupid tool.
If we want to give Shimano the benefit of the doubt, you could argue that by using that little plastic star tool, they made it just a bit harder for someone to walk off with your cranks and pedals. If you see a large Allen cap, you could show up with a full Allen wrench set and quickly walk off with someone's crankset having loosened 3 bolts. Older square taper cranks required a puller to remove, but the newer stuff is simply slid though the BB and only fastened on one side. Easily installed...easily stolen. Just a thought.

-Jeremy
Tunnelrat81 is offline   Reply With Quote
Old 01-03-10, 02:21 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)
Quote:
Originally Posted by Tunnelrat81 View Post
but in reality these Ultegra cranksets come loose under normal use,\
No they don't. Pure fabrication.

Properly torqued parts don't come loose under normal use, that's why these torque spec EXISTS. We know that cap sets the preload on the crankset, that's not the issue here.

Quote:
Originally Posted by Tunnelrat81 View Post
So my experience is first hand. Even if it's not technically the crank arm that's loose....but instead the BB Cups
If you're undertorquing the BB cups, and they come loose, how is that the crankset coming loose. Talk about misleading.
operator is offline   Reply With Quote
Old 01-03-10, 02:23 PM   #16
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)
Quote:
Originally Posted by Tunnelrat81 View Post
I've been told by at least one LBS that this is typical. I've even heard a mechanic say that they have better luck with Ultegra 9 BB/cranksets staying torqued than with the 10 speed external cups. I can't comment on that claim though as I have no personal experience.

-Jeremy
Yeah, well your LBS is a ******. We've been selling and working on external bottom bracket bikes since they were introduced. Whoever is telling you this obviously false information doesn't know what proper torque is, nor has the tools or the knowledge to ensure that parts are up to it.
operator is offline   Reply With Quote
Old 01-03-10, 02:57 PM   #17
Caad 8
Cat-5-O-Meter: Training
Thread Starter
 
Caad 8's Avatar
 
Join Date: Sep 2009
Location: California
Bikes: Cannondale Caad 8
Posts: 891
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I came back from a ride, unclipped, got off the bick, and then the arm fell off. I noticed the black piece was missing, and the two other bolts were very loose. Not sure how that happened because I check the bolts on the entire bike every so often.
Caad 8 is offline   Reply With Quote
Old 01-03-10, 03:26 PM   #18
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)
Buy a torque wrench and learn what 12-15nm for those arms is supposed to be.
operator is offline   Reply With Quote
Old 01-03-10, 04:10 PM   #19
Copper1122
Senior Member
 
Copper1122's Avatar
 
Join Date: Sep 2008
Location: Detroit, MI
Bikes:
Posts: 104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Panthers007 View Post
Very obnoxious making the bloody cap proprietary so most home-mechanics (most) have to buy their stupid tool.
Proprietary.... Its the cornerstone of Japanese business strategy. Ever hear of a company called "Sony"
Copper1122 is offline   Reply With Quote
Old 01-03-10, 04:59 PM   #20
zzyzx_xyzzy
headtube.
 
zzyzx_xyzzy's Avatar
 
Join Date: Sep 2008
Bikes:
Posts: 804
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
The reason it is a proprietary hand tool is because the cap takes just the barest bit of torque to set the preload. If it were a regular Allen bolt you'd have every person who hadn't seen this crank style before coming back for new bearings after ruining their first set.
zzyzx_xyzzy is offline   Reply With Quote
Old 01-03-10, 05:16 PM   #21
Copper1122
Senior Member
 
Copper1122's Avatar
 
Join Date: Sep 2008
Location: Detroit, MI
Bikes:
Posts: 104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by zzyzx_xyzzy View Post
The reason it is a proprietary hand tool is because the cap takes just the barest bit of torque to set the preload. If it were a regular Allen bolt you'd have every person who hadn't seen this crank style before coming back for new bearings after ruining their first set.
Bravo! However, I still hate Sony and their media cards
Copper1122 is offline   Reply With Quote
Old 01-03-10, 07:55 PM   #22
Tunnelrat81
Senior Member
 
Tunnelrat81's Avatar
 
Join Date: Jun 2006
Bikes:
Posts: 1,372
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Quote:
Originally Posted by operator View Post
Properly torqued parts don't come loose under normal use, that's why these torque spec EXISTS. .
It's true that my LBS never tightened my BB cups OR crank arm pinch bolts with a torque wrench. I'm doing this service for myself now, and have had consistently better luck with things staying in place, still not using the torque wrench. A torque wrench is my list tools to one day own. I apologize for passing on bad info here.

-Jeremy
Tunnelrat81 is offline   Reply With Quote
Old 01-03-10, 08:28 PM   #23
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)
Quote:
Originally Posted by zzyzx_xyzzy View Post
The reason it is a proprietary hand tool is because the cap takes just the barest bit of torque to set the preload. If it were a regular Allen bolt you'd have every person who hadn't seen this crank style before coming back for new bearings after ruining their first set.
Exactly

I believe we've discussed this preload bolt design before on another thread.
operator 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 11:35 PM.