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 05-20-11, 08:48 PM   #1
andboy
Senior Member
Thread Starter
 
Join Date: Feb 2011
Location: Frederick, MD
Bikes: Trek Madon 4.5, Fausto Coppi Masciaghi, Soma Double Cross
Posts: 79
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Problem with left crank arm...

I have a Specialized Allez Triple.

Went to LBS and while trying to adjust the bottom bracket, something went wrong with the thread on the left crank arm, the thread just came out.

Now, i'm not very upset at them for that, they were trying to help me out.

However, their solution was to order me one silver crank arm (at my cost) to replace the black crank arm with the stripped thread. My bike isn't wonderful, but it doesn't need unmatched crank arms...

I would rather have the same on both sides so I called them and cancelled the order.

Now i'm trying to find a black pair of crank arms. The ones on the bike are Sugino, 172.5mm, is this a suitable alternative?

http://www.benscycle.net/index.php?m...ducts_id=11836

Or can I use any size e.g. 170 or 175mm?

Do they have to be Sugino or can I use any brand?

Thanks!

Andy
andboy is offline   Reply With Quote
Old 05-20-11, 09:25 PM   #2
3v1lD4v3
Senior Member
 
Join Date: Jul 2009
Bikes:
Posts: 90
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
http://www.specialized.com/us/en/bc/...geName=support

See what Specialized has to say about it.
3v1lD4v3 is offline   Reply With Quote
Old 05-20-11, 09:31 PM   #3
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 29,660
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 217 Post(s)
If you want to keep matched crank arms, buying a pair of Jacobs Chuck removal wedges might be better use of your dough than new cranks.

I'm assuming the crank is OK other than the removal issue. Jacobs wedges are fairly inexpensive and do a good job removing cranks by pushing from the back instead of pulling, so there's no reason not to remount your stripped arm.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 05-21-11, 08:00 PM   #4
Unapomer
Senior Member
 
Unapomer's Avatar
 
Join Date: Nov 2008
Location: Left Coast, U.S. of A.
Bikes:
Posts: 54
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The simple, economic solution is to buy the silver replacement crankarm and paint it black. I also suggest you change bike shops. The thread on the crankarm just doesn't "come out" on its own. My suspicion is your LBS didn't screw the crankarm puller in all the way to pull the left arm off to access the bb and that's their bad and they should be responsible for replacement.
Unapomer is offline   Reply With Quote
Old 05-21-11, 09:36 PM   #5
FastJake
Constant tinkerer
 
FastJake's Avatar
 
Join Date: May 2010
Location: Madison, Wisconsin
Bikes:
Posts: 7,574
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Unapomer View Post
My suspicion is your LBS didn't screw the crankarm puller in all the way to pull the left arm off to access the bb and that's their bad and they should be responsible for replacement.
+1

It's a least worth a shot going back there and b----ing them out. It's their fault, they should make it right at their cost. Although it might be too late for that now..

If you can get the arm free you can still use it, which would save you the hassle and money of buying a new one if the shop doesn't take responsibility for it.
FastJake is offline   Reply With Quote
Old 05-21-11, 10:35 PM   #6
Kimmo
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Bikes: copy/paste links: http://velospace.org/node/36949 http://velospace.org/node/47746 http://velospace.org/node/47747
Posts: 7,099
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Unapomer View Post
My suspicion is your LBS didn't screw the crankarm puller in all the way to pull the left arm off to access the bb and that's their bad and they should be responsible for replacement.
That's pretty likely. I've come across guys in shops who seem to think cranking the puller into those threads hard is a good idea, too - that's another way to trash those fine ally threads. The puller only needs to be finger-tight.

Quote:
Originally Posted by andboy View Post
Or can I use any size e.g. 170 or 175mm?
Depends on your leg length and riding style. I'm 5'10" and pretty good at spinning, so when I tried some 175s after only ever using 170s, I really liked them. I had noticeably more power, and the extra length didn't incur much of a redline penalty cause of my height and spinning ability.

It wasn't a huge difference though; I would have only just noticed a 2.5mm change.

Last edited by Kimmo; 05-21-11 at 10:40 PM.
Kimmo is offline   Reply With Quote
Old 05-28-11, 03:43 PM   #7
andboy
Senior Member
Thread Starter
 
Join Date: Feb 2011
Location: Frederick, MD
Bikes: Trek Madon 4.5, Fausto Coppi Masciaghi, Soma Double Cross
Posts: 79
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have been travelling all week, on way back and was sitting at airport when they phoned to say they have my silver crankarm in, that I don't want and cancelled...

I just ordered two crank arms (silver) off ebay, i'll take them in when I get them and have a word with the guy.
andboy 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 02:30 PM.