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

New: Take Part in the August Giveaway to Win the SAVA Aurora V3.0 Carbon Road Bike


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...

Forum Jump:

[-]
10 Latest Posts
New Bike Day (Come One, Come All!)
Today 12:18 AM
Giant Trance X 29 1
Today 12:12 AM
MTB Night Lighting - What are recommenda...
Today 12:08 AM
Mavic XM319
Today 12:04 AM
The LAST High-End Rim Brake Bike?
09-13-2024 03:21 PM
Which aspects of e-bikes do you think ar...
09-13-2024 12:18 AM
Have you learned to fall?
09-12-2024 07:27 PM
Ebikes for big guys
09-12-2024 12:10 PM
Would you use WD-40 for cleaning and/or ...
09-12-2024 07:50 AM
Hey All - Emmanuel Katto Uganda Here
09-12-2024 07:31 AM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. enkei
22 posts
no avatar 2. GirishH
21 posts
no avatar 3. rydabent
15 posts
no avatar 4. meamoantonio
13 posts
no avatar 5. Painkiller
12 posts