|Campy grinding sound - could it be my hub or freewheel?||Rick S|
Sep 13, 2001 11:43 AM
|Hello all - |
I hear a grinding, tinkling sound from the rear of the drivetrain - regardless whether I'm pedaling or coasting. i've got open pro rims with record hubs. My chain and rear derailuer are within spec. - What do you think is the cause? Checked my brakes - they aren't rubbing. Could be that the wheel spokes are out of true or loose - I'm a heavy (195#) rider...I'll pull 'em off and check tonight. By the way, how do you lube record hubs -I think they have a port - what fitting do I use to lube 'em?
Thanks for your help!
|re: Campy grinding sound - could it be my hub or freewheel?||mackgoo|
Sep 13, 2001 1:37 PM
|How old are they? Between the spokes there is a spring clip arangement. That comes off and you pump grease in there. Also on the free wheel body there is a port. this port is plugged with a very small allen screw. Check out Campy"s web site.|
|Hub's are about a year old..||Rick S|
Sep 14, 2001 9:53 AM
|The hubs are one year and about 2,500 miles of riding old. I bought the wheels (and hubs) from Colorado Cyclist. |
Thanks for the help!
|re: Campy grinding sound - could it be my hub or freewheel?||Cliff Oates|
Sep 13, 2001 2:01 PM
|Lubing the hubs through the lubrication port is usually not recommended. If you do use it, you use oil and not grease. The Campy Only web site talks about this in their tech talk section.
As far as the noise, I'd get the bike in the stand and start trying to isolate the conditions under which you can duplicate the sound. Take the wheel out of the frame and spin it in your hands -- if it grinds then it's time to service the hub. Spokes sometimes make noise when they're flexing under a load, I've mostly experienced that sound while turning, usually on poorly built wheels.
|Could be spokes rubbing||Kerry Irons|
Sep 13, 2001 5:20 PM
|This could be spokes rubbing at the cross points. Easy to figure out - just put a drop of lube at each spoke cross and see if the noise goes away. Could also be spokes at the rim ferrules. To properly lube a hub, you need to disassemble it and clean it. Pushing grease through the center hub hole means that the space between the axle and hub shell is filled with grease and therefore greatly increases hub friction. Plus you end up with grease oozing out of the hub without necessarily cleaning the bearings. If you hear the noise whether pedaling or not, then it is not the drive train/cassette. If the hubs are the problem, you should be able to feel roughness when turning the axles with your fingers. One final possibility is that there are some metal shavings loose inside the rim. You should be able to hear this by just shaking the wheels.|
|It was the spokes rubbing!||Rick S|
Sep 15, 2001 3:09 PM
|You were right - a drop of lube cured it. What is the permanent fix? Or should you occassionally lube the cross points? |
Thanks for the advice!
|No permanent cure, but||Kerry Irons|
Sep 16, 2001 3:08 PM
|If you use some sort of wax instead of oil, it will obviously hold up longer. There are such things as "aluminum lubricant" and "metal protectant" sprays which leave a resin coating on the metal and are much less likely disappear quickly. I know Dow Corning makes them - probably available through industrial supply places, or maybe at a well-stocked hardware store. Also, this may stop with time as the spokes rub a smooth spot on each other.|| |