Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the October Giveaway for a Whiskey Tango Foxtrot urban gravel bike from Van Dessel Cycles


V brake Carbon frame question
#1
Hi group, I bought a carbon frame on ebay, and I wanted to put V brakes on it. So I put the front set on and they work great.

Forgot to mention, I understand how to adjust the V brakes in general, I've done it for years on my various bikes.

The rear is another story, I'm looking at my frame i I notice the pin slot on the frame spins meaning it's attached to the brake posts but it is not fixed.

So when I put the brake arms on I am not feeling the spring, but I did change mounting bolts and the right side spring showed some tension. The left side is dead as a doornail.

My question is, the pin receptor on the frame suppose to be free spinning or stationary. If my spring is broken in the brake, how would one test that, as I can move the spring but I feel the front of the brake boss move and not the arm itself. I hope that makes sense.

Thanks in advance.
  Reply
#2
(10-18-2011, 10:27 PM)dfphoto Wrote:  Hi group, I bought a carbon frame on ebay, and I wanted to put V brakes on it. So I put the front set on and they work great.

Forgot to mention, I understand how to adjust the V brakes in general, I've done it for years on my various bikes.

The rear is another story, I'm looking at my frame i I notice the pin slot on the frame spins meaning it's attached to the brake posts but it is not fixed.

So when I put the brake arms on I am not feeling the spring, but I did change mounting bolts and the right side spring showed some tension. The left side is dead as a doornail.

My question is, the pin receptor on the frame suppose to be free spinning or stationary. If my spring is broken in the brake, how would one test that, as I can move the spring but I feel the front of the brake boss move and not the arm itself. I hope that makes sense.

Thanks in advance.

Hi, if you could post a pic. Showing the V brake attachments of the frame, we could see the problem a little better. Never heard of that problem.
  Reply
#3
(10-20-2011, 03:14 AM)ghost Wrote:  
(10-18-2011, 10:27 PM)dfphoto Wrote:  Hi group, I bought a carbon frame on ebay, and I wanted to put V brakes on it. So I put the front set on and they work great.

Forgot to mention, I understand how to adjust the V brakes in general, I've done it for years on my various bikes.

The rear is another story, I'm looking at my frame i I notice the pin slot on the frame spins meaning it's attached to the brake posts but it is not fixed.

So when I put the brake arms on I am not feeling the spring, but I did change mounting bolts and the right side spring showed some tension. The left side is dead as a doornail.

My question is, the pin receptor on the frame suppose to be free spinning or stationary. If my spring is broken in the brake, how would one test that, as I can move the spring but I feel the front of the brake boss move and not the arm itself. I hope that makes sense.

Thanks in advance.

Hi, if you could post a pic. Showing the V brake attachments of the frame, we could see the problem a little better. Never heard of that problem.

Hi meant to update the post, I spent some time after work looking at my bike, the xt 770 brake spring is not broken, and the problem was the v-brake boss on the frame as it turns out both bosses were loose and by taking the bosses out and cleaning the holes up, I added some lock tight and tightened the bosses and placed the spinning pin ring into 3 o'clock 9 o'clock and the brakes worked perfectly.

Very odd situation as the frame had a hole for a pin and I thought the spinning ring was supposed to have a pin, but my method worked so I'm not that concerned now. I also tried the brake without the spinning ring but that didn't work so...

I now find myself without barrel adjustment bolt for my rear derailleur but that's another story... I believe my new bike will weigh about 19-20lbs complete I went with an old rockshox Sid as I only weigh 134lb.

Hope everyone else finds their solutions....u
  Reply
#4
(10-20-2011, 03:58 AM)dfphoto Wrote:  
(10-20-2011, 03:14 AM)ghost Wrote:  
(10-18-2011, 10:27 PM)dfphoto Wrote:  Hi group, I bought a carbon frame on ebay, and I wanted to put V brakes on it. So I put the front set on and they work great.

Forgot to mention, I understand how to adjust the V brakes in general, I've done it for years on my various bikes.

The rear is another story, I'm looking at my frame i I notice the pin slot on the frame spins meaning it's attached to the brake posts but it is not fixed.

So when I put the brake arms on I am not feeling the spring, but I did change mounting bolts and the right side spring showed some tension. The left side is dead as a doornail.

My question is, the pin receptor on the frame suppose to be free spinning or stationary. If my spring is broken in the brake, how would one test that, as I can move the spring but I feel the front of the brake boss move and not the arm itself. I hope that makes sense.

Thanks in advance.

Hi, if you could post a pic. Showing the V brake attachments of the frame, we could see the problem a little better. Never heard of that problem.

Hi meant to update the post, I spent some time after work looking at my bike, the xt 770 brake spring is not broken, and the problem was the v-brake boss on the frame as it turns out both bosses were loose and by taking the bosses out and cleaning the holes up, I added some lock tight and tightened the bosses and placed the spinning pin ring into 3 o'clock 9 o'clock and the brakes worked perfectly.

Very odd situation as the frame had a hole for a pin and I thought the spinning ring was supposed to have a pin, but my method worked so I'm not that concerned now. I also tried the brake without the spinning ring but that didn't work so...

I now find myself without barrel adjustment bolt for my rear derailleur but that's another story... I believe my new bike will weigh about 19-20lbs complete I went with an old rockshox Sid as I only weigh 134lb.

Hope everyone else finds their solutions....u

To add a barrel adjuster to the rear derailleur, add a Jagwire in-line barrel adjuster to the rear derailleur housing loop:

[Image: 2010sram.jpg?w=500&h=416]
  Reply
#5
I ended up ordering a shimaino part from niagra cycle 2.60 so.....
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
13,548
06-18-2015, 02:07 AM
Last Post: eastman
 
6,438
12-21-2014, 04:36 PM
Last Post: GeorgeET
 
6,387
06-03-2012, 08:49 PM
Last Post: mojoe
 
13,148
02-13-2012, 09:45 PM
Last Post: barefooter
 
8,431
08-21-2011, 10:05 AM
Last Post: RobAR
 
16,885
04-11-2011, 04:46 PM
Last Post: Portellini

Forum Jump:

[-]
10 Latest Posts
Biking in the rain
Yesterday 10:23 AM
hello from the windy city
Yesterday 04:31 AM
Grinding/scraping sound in front wheel (...
Yesterday 01:31 AM
400 lb. weight limit bikes
Yesterday 01:14 AM
Rossin CL score
Yesterday 12:56 AM
How to remove a Dork disc
Yesterday 12:50 AM
Knocking sound coming from freewheel? (E...
10-18-2020 02:29 PM
My "FAVORIT" Bike, 70s Czech bike
10-18-2020 12:40 PM
2020 road cycling season
10-18-2020 11:36 AM
Year & Price on this Miyata 600GT
10-18-2020 09:39 AM

[-]
Top 5 Posters This Month
no avatar 1. Jesper
30 posts
no avatar 2. Painkiller
10 posts
no avatar 3. Papa Dom
8 posts
no avatar 4. J_R_Schultz
7 posts
no avatar 5. Evan J Green
6 posts