Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Lost Avid BB7_Mtn Adjuster Knob. Safe to Ride?

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.

Lost Avid BB7_Mtn Adjuster Knob. Safe to Ride?

Old 11-24-16, 07:45 PM
  #1  
SlickCycles
Member
Thread Starter
 
Join Date: Jul 2013
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Lost Avid BB7_Mtn Adjuster Knob. Safe to Ride?

I lost my Avid BB7_Mtn outside Adjuster Knob while transporting it on the bus.

I'm away for vacation and dying to take it out for a ride before the LBS is open.

I did check and the break still works well after a few turns of the flat price which connected to the knob.

Is this still safe to ride for a 30 mile ride tomorrow? Or would it cause damage to the brake and potentially myself?

I'll plan to take it to the LBS after the ride if it's ok.


Added a picture of what it looks like now and the knob that is missing. Its the smaller knob to the right in the photo.
Attached Images
File Type: jpg
IMG_2134.jpg (89.6 KB, 42 views)
File Type: jpg
61virafD2TL__SL1200_.jpg (73.3 KB, 43 views)

Last edited by SlickCycles; 11-24-16 at 07:57 PM.
SlickCycles is offline  
Old 11-24-16, 08:18 PM
  #2  
JonathanGennick 
Senior Member
 
JonathanGennick's Avatar
 
Join Date: Apr 2007
Location: Munising, Michigan, USA
Posts: 4,066

Bikes: Priority 600, Priority Continuum, Devinci Dexter

Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 654 Post(s)
Likes: 0
Liked 22 Times in 16 Posts
Should be ok to ride. I can't imagine that plastic bit is holding anything together. It's just there to provide you enough leverage to turn the adjuster shaft.
JonathanGennick is offline  
Old 11-24-16, 08:23 PM
  #3  
Dan Burkhart 
Senior member
 
Dan Burkhart's Avatar
 
Join Date: Oct 2004
Location: Oakville Ontario
Posts: 7,287
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 549 Post(s)
Liked 24 Times in 21 Posts
I'm not 100% sure about this, but I think the 4 sided spring clip that fits inside the knob is what provides the detent action that holds the adjuster from backing off. If that is so, there is nothing but a bit of friction preventing the adjustment from backing off.
It would be easy enough to verify this. turn the flat end of the shaft with a pair of pliers. If you don't feel the clicks, well then, I was right.

Last edited by Dan Burkhart; 11-24-16 at 08:27 PM.
Dan Burkhart is offline  
Old 11-24-16, 08:38 PM
  #4  
SlickCycles
Member
Thread Starter
 
Join Date: Jul 2013
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Yeah turned it with my fingers and didn't hear any clicks
SlickCycles is offline  
Old 11-24-16, 08:57 PM
  #5  
wschruba 
Senior Member
 
Join Date: Sep 2015
Location: New Jersey
Posts: 1,535
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 465 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
You can kind of hack it by adjusting the missing side all the way out, then re-adjusting the caliper as if it were a single adjustable piston brake. It should suffice until you get a replacement cover for the brake.
wschruba is offline  
Old 11-24-16, 09:07 PM
  #6  
SlickCycles
Member
Thread Starter
 
Join Date: Jul 2013
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
New to disc breaks so not too sure how to do that. Brakes still work well, would they slip out of position?
SlickCycles is offline  
Old 11-24-16, 09:20 PM
  #7  
wschruba 
Senior Member
 
Join Date: Sep 2015
Location: New Jersey
Posts: 1,535
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 465 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
You can follow the instructions at http://www.parktool.com/blog/repair-help/avid-mechanical-disc-adjustment#article-section-2

At the section for caliper alignment, disregard the direction to adjust the outer adjuster (step 5), and instead insert a business card between the outer pad and the rotor. Adjust the test as described--you should then be able to complete the procedure as outlined, and use the barrel adjuster to set clearance for the outer pad.
wschruba is offline  
Old 11-25-16, 12:12 AM
  #8  
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Posts: 21,334

Bikes: Some silver ones, a red one, an orange one and a few titanium ones

Mentioned: 94 Post(s)
Tagged: 1 Thread(s)
Quoted: 2516 Post(s)
Liked 121 Times in 87 Posts
Originally Posted by SlickCycles View Post
Yeah turned it with my fingers and didn't hear any clicks
You won't hear any clicks. The clicks are made by the plastic bits interacting with the detents on the outside of the caliper body. They will work just fine but they won't 'click'.

You can get replacement knobs for just about anywhere. Your local bike shop should be able to order them from Quality Bicycle Products.
__________________
Stuart Black
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Days of Wineless Roads. Bed and Breakfasting along the KATY
Twisting Down the Alley. Misadventures in tornado alley.
An Good Ol' Fashion Appalachian Butt Whoopin'.
cyccommute is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MisterK
Bicycle Mechanics
21
01-31-13 02:14 PM
TejanoTrackie
Track Cycling: Velodrome Racing and Training Area
6
10-10-12 10:29 AM
funkflex
Singlespeed & Fixed Gear
7
07-11-09 12:59 PM
no motor?
Foo
2
12-05-08 07:17 AM
feethanddooth
Charity Events
0
06-03-07 07:04 AM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.