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

New: Take Part in the January Giveaway for a Chance to Win the Movcan V80 E-bike Worth $889


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
The roaming Radrunner Vlog 24
Yesterday 08:36 PM
New Image
Yesterday 08:25 PM
eBike Trends for 2023
Yesterday 07:14 PM
Fingers going numb especially last 2 on ...
Yesterday 04:35 PM
Beginner Mountain Biking Tips
01-24-2025 02:59 PM
Bridgestone Blouson bike.
01-24-2025 02:59 AM
Folding Security Bike
01-23-2025 04:37 PM
Cycling industry is pricing out their ow...
01-23-2025 09:06 AM
New in Michigan
01-23-2025 08:58 AM
New in ROC
01-23-2025 08:57 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
17 posts
no avatar 2. GirishH
15 posts
no avatar 3. SPINMAN
12 posts
no avatar 4. ReapThaWhirlwind
11 posts
no avatar 5. Flowrider
10 posts