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 04-02-12, 05:44 AM   #1
JonathanGennick 
Senior Member
Thread Starter
 
JonathanGennick's Avatar
 
Join Date: Apr 2007
Location: Munising, Michigan, USA
Bikes: Gary Fisher Hodgepodge 26er Rigid
Posts: 2,500
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Replacing water bottle boss

Is there an easy solution to replacing a water-bottle boss in aluminum frame? This is a Rockhopper frame, aluminum, and the downtube is sort of square and flat in the location of the boss.

The original boss broke loose. So now the kid I'm helping is stuck with about a 5/16ths-inch circular hole and no way to mount his bottle cage.

I might pull the bottom bracket and see whether I can thread a bolt through coming in from that way. I am just wondering whether there might be an easier, off-the-shelf fix.
JonathanGennick is offline   Reply With Quote
Old 04-02-12, 05:52 AM   #2
reptilezs
Senior Member
 
Join Date: Sep 2004
Location: boston, ma
Bikes:
Posts: 2,852
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
just get a new riv nut crimped unless the hole is smoked. we do it all the time. cost is like 10-20 bucks
reptilezs is offline   Reply With Quote
Old 04-02-12, 06:01 AM   #3
Dan Burkhart 
Senior member
 
Dan Burkhart's Avatar
 
Join Date: Oct 2004
Location: Oakville Ontario
Bikes:
Posts: 5,945
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
If the hole is not too badly oversized, a new Riv Nut can be installed. I like to use an epoxy like JB Weld for insurance. Did a couple of videos on this. The first one shows how you can install a Riv Nut without the tool.
http://www.youtube.com/watch?v=E8ssW67QZRI
http://www.youtube.com/watch?v=BETc5IkbvlY
Dan Burkhart is offline   Reply With Quote
Old 04-02-12, 06:04 AM   #4
JonathanGennick 
Senior Member
Thread Starter
 
JonathanGennick's Avatar
 
Join Date: Apr 2007
Location: Munising, Michigan, USA
Bikes: Gary Fisher Hodgepodge 26er Rigid
Posts: 2,500
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by reptilezs View Post
just get a new riv nut crimped unless the hole is smoked. we do it all the time. cost is like 10-20 bucks
Hey! Are you the Boston Bike Mechanic? I follow your blog now and then.

I googled "riv nut". Yeah, that looks like the way to go here. I will find out whether any of the nearby shops have the tool.
JonathanGennick is offline   Reply With Quote
Old 04-02-12, 06:47 AM   #5
dsbrantjr
Senior Member
 
dsbrantjr's Avatar
 
Join Date: Sep 2010
Location: Roswell, GA
Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta
Posts: 4,577
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
If the hole is blown out too large for another RivNut there are plenty of clamp-on cage mounts and bosses; one like this might do the trick: http://www.amazon.com/Elite-Universa.../dp/B001FTL3R4
dsbrantjr is online now   Reply With Quote
Old 04-02-12, 07:00 AM   #6
dsbrantjr
Senior Member
 
dsbrantjr's Avatar
 
Join Date: Sep 2010
Location: Roswell, GA
Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta
Posts: 4,577
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Here is a source with numerous water bottle mounting methods: http://nordicgroup.us/cageboss/
dsbrantjr is online now   Reply With Quote
Old 04-02-12, 08:43 PM   #7
reptilezs
Senior Member
 
Join Date: Sep 2004
Location: boston, ma
Bikes:
Posts: 2,852
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by JonathanGennick View Post
Hey! Are you the Boston Bike Mechanic? I follow your blog now and then.

I googled "riv nut". Yeah, that looks like the way to go here. I will find out whether any of the nearby shops have the tool.
yea that's me. any service department worth their salt should have the tool.
reptilezs 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 01:51 PM.