Howdy Bill, 1. I upgraded to a new wheel set that included beefier rims and a dyno up front. This is an upgrade from the Silver / Alex that came stock on the Appaloosas. I'm also in conversation with the builder, but we are on other sides of the country so I'm trying to crowd source some ideas! 2. Bitex BX103r 3. The input is me turning the crank by hand, backpedaling a little at a time and then pushing it forward to simulate pedaling load. I'm not pushing particularly hard in the video. I'm doing it to illustrate the noise. 4. 6 pawls. I removed the lock ring, the pawls, and the tiny, tiny return springs under the pawls from the freehub body. I didn't touch the bearing cartridges. Pawls are in the freehub on this one, ratchets in the hub body. 5. I took high res photos of the pawl assembly under a studio light and inspected the high res photos. My vision is pretty good, but not that good! I looked at the splines in the driveshell with a bright light and ran a toothpick over each one to see if I could feel any deformations, nicks, etc. 6. Each of the six pawls is cut into two teeth on the business end. The locking goes in between the pawl teeth. Let me see if I can upload a photo.
I'd love to hear your theory! I'm well beyond the scope of my knowledge! On Monday, September 21, 2020 at 7:59:41 PM UTC-7 Bill Lindsay wrote: > Here are my questions: > > 1. Why did you put a new rear wheel on your Appaloosa? > 2. What rear hub is on your new rear wheel? > 3. In the youtube video you aim the camera at the cassette but don't show > what you are doing at the input. What are you doing at the input? I think > you are backpedalling a little and then deliberately jerking the pedals > forward. The chain isn't going slack and slamming tight on it's own. You > are doing that on purpose to illustrate the noise. Correct? > 4. When you "pulled apart the rear hub and inspected the freehub pawls", > how many pawls are there? 2? 3? 6? To be clear, the pawls are the tiny > pieces of metal that are springloaded and individually click into the > splines of the drive ring or drive shell, depending on the way your rear > hub is architected. > 5. When you say you inspected the pawls, did you actually inspect the > pawls, or did you mean you looked at the splines of the driveshell? > 6. Do your pawls have a single engagement end like most freehub and > freewheel pawls, or are they toothed with two or three teeth on their > business end? > > I have a theory, and I'm pretty sure it's correct, but I don't want to > post a long and correct description for the wrong rear hub, because it will > confuse people who are not mechanics. I don't mind confusing people with > long correct descriptions when they are relevant to the problem at hand. > > Bill Lindsay > El Cerrito, CA > > On Monday, September 21, 2020 at 6:41:50 PM UTC-7 Litho wrote: > >> Some context: put a new wheel on my Appaloosa a few days ago. New wheel, >> all other parts of the drivetrain the same. A few minutes into the first >> ride around the block, I heard a ping from the rear of the drivetrain. >> Stopped to see if the chain was off. Nope. Got on and didn't hear it >> again until later in the ride. But only once more. >> >> Back at home, admiring the new wheels, spun the pedals backward and >> hopped on to ride down the driveway. As soon as I pedaled, PING. >> >> So, drivetrain noise are notoriously irritating to root out. This one is >> driving me nuts. I've done the following: >> -Put another wheel on the bike to see if it still made the noise. It did >> not. >> -Put a new chain on. Still made the noise. >> -Tuned up my rear derailleur. Still made the noise. >> -Swapped cassette. Still made the noise. >> -Put the rear wheel on another bike. It made the same noise on the other >> bike. >> -Tightened every bolt / nut in the drivetrain to manufacturer's spec >> using a torque wrench. >> - Pulled apart rear hub and examined freehub pawls. No apparent damage. >> Cleaned and relubed freehub. Reinstalled. Still made the noise. >> -Inspected and reinstalled the axle. Still made the noise. >> -Checked and adjusted spacer on cassette. Still made the noise. >> >> What variable have I not yet isolated and tested??? Where does the >> pinging gremlin live??? >> >> I'd love to hear some suggestions. >> >> Here's a video complete with the ping: >> https://youtu.be/4v4TO9NKpAE >> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/d3e8d2e8-a537-4d3d-ba65-5f79b795ade2n%40googlegroups.com.
