By Rick Schultz
I bought a used carbon frame to use on the trainer. A Neil Pryde that I got for next to nothing.
The previous owner dropped the chain so it scuffed up the drive-side bottom bracket area (no structural damage) but he couldn’t tell since he couldn’t get the bottom bracket out. And I think this was the reason for him selling it so cheap – looks like he tried to use a screwdriver to remove the BB?
Luckily, I have the right tools and was able to pop the BB right out. Visual and tap test inspections show no structural damage. I will be getting some unidirectional carbon fiber tape and repair this area (for fun).
So, here are the first things I do to a used frame to prep it for a build.
- Inspect prior to purchase to see if it is worth buying.
If yes, then after you get back home, - Remove fork and inspect for damage.
- Look at headset bearings to see if need replacing.
- Do a rear dropout/rear derailleur alignment. This frame was actually perfect!
- Remove BB and inspect inside frame.
- Thoroughly inspect entire frame for any structural damage.
- Clean and wax frame with Lemon Pledge.
Now, it’s ready for assembly.
Coach Rick Schultz is an avid cyclist who trains, races and coaches in Southern California. Rick is an engineer by trade, and in addition to being a coach, he's a bike fitter and prolific product reviewer. He's the author of Stretching & Core Strengthening for the Cyclist and Bike Fit 101: Your Toolset for a Great Bike Fit in the RBR eBookstore. Check his product reviews website, www.biketestreviews.com, and his coaching site, www.bikefitnesscoaching.com. Click to read Rick's full bio.
I would also recommend obtaining a small rubber mallet and tapping on all carbon surfaces. Tap with enough force to get the vibrations through the carbon. You will get used to a certain sound. If you hit a spot which has damage you will hear a dull sound or at least a different sound. It you do. Get it x rayed. Don’t ride it!
They make a specialized tap hammer for composites that’s very cheap and allows you tap test for delamination.
Used carbon fiber frame? No thanks.