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 05-18-12, 08:41 AM   #1
Madridjoe
Man, I love this bike!
Thread Starter
 
Madridjoe's Avatar
 
Join Date: Apr 2007
Location: Lancaster Pa
Bikes: 2007 Madone 6.9 SSL
Posts: 135
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
New chainring?

I was hit by a truck a couple months ago while on my road bike. My broken shoulder is now healed and I am riding again but I see the outer chain ring got bent a bit in the accident, question is, bend it back or replace. also it looks like there was threadlock of some kind on the chainring bolts, anything special I need to use there?
Madridjoe is offline   Reply With Quote
Old 05-18-12, 08:51 AM   #2
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,917
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 95 Post(s)
What crank make and model do you have? Many lower line cranks have the chainrings riveted to the spider arms and can not be removed or replaced. For a crank with removable chainrings, typically you need a 5 mm allen key for the bolt heads and, maybe, a special spanner or wide blade screwdriver to keep the inner nuts from turning.
HillRider is offline   Reply With Quote
Old 05-18-12, 09:22 AM   #3
ThermionicScott 
Gratuitous glib and snark
 
ThermionicScott's Avatar
 
Join Date: Aug 2011
Location: CID
Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers)
Posts: 13,620
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 212 Post(s)
You lived! Treat yourself.
__________________
Quote:
Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
RUSA #7498
ThermionicScott is online now   Reply With Quote
Old 05-18-12, 07:02 PM   #4
Madridjoe
Man, I love this bike!
Thread Starter
 
Madridjoe's Avatar
 
Join Date: Apr 2007
Location: Lancaster Pa
Bikes: 2007 Madone 6.9 SSL
Posts: 135
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It's a Bontrager crank, the chain rings came off with no problem. Then large chainring had a slight bend in it, I think I have it straight again, everything seemed ok in the bike stand, I'll try it on the road this weekend and see how it goes. Looking at the price of new rings makes me think I would throw in a little more cash and get a new compact crank if I have to replace the rings I have.
Madridjoe is offline   Reply With Quote
Old 05-19-12, 06:41 AM   #5
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,917
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 95 Post(s)
Quote:
Originally Posted by Madridjoe View Post
It's a Bontrager crank, the chain rings came off with no problem. Then large chainring had a slight bend in it, I think I have it straight again, everything seemed ok in the bike stand, I'll try it on the road this weekend and see how it goes. Looking at the price of new rings makes me think I would throw in a little more cash and get a new compact crank if I have to replace the rings I have.
If the straightened chainring is working ok, sure, continue to use it. As you have discovered, a new complete crank is often not much more than just replacing chainrings.
HillRider is offline   Reply With Quote
Old 05-19-12, 09:23 AM   #6
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 20,436
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 656 Post(s)
I'd just get a whole new crank.. now you get to choose chainring sizes.
Manufacturer goes by their choices, now it's your turn.

I doubt you need a huge high gear.. ..
fietsbob 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 10:15 PM.