AboutSteve Mills Expertise I can answer any question that I am asked. I am a very well know bicycle mechanic, and have been for a few years. If by any chance I can't answer your question(s), I'll refer you to one of my renown references to make sure your question gets answered.
Experience I have been working on bicycles since I was a teenager. I now own a small business building and selling bicycles. From fixing a flat, to rebuilding a custom bicycle, I have done it all, I have seen it all.
Education/Credentials High School, Small business in this field.
Expert: Steve Mills Date: 4/29/2008 Subject: Grinding noise from rear hub
Question Over the weekend my cousin and I did a 30 mile ride and at about 10 miles into the ride his Redline expert 20 inch single speed started to make grinding noise from the back wheel about 1 in 10 times that he coasted, by the time 25 miles rolled by it was grinding every other time he coasted. Do the bearings need to be replaced or lubed? Or is something else wrong with it? If so what tools and parts do I need to fix this problem? I have been an avid biker and recently got my cousin into road biking and I would like to start fixing and taking care of my bike rather than taking it in every time.
Thanks
Answer This grinding noise is caused from your bearing cones. Either the cones are worn, dry or just dirty. To fix this, you will need a couple of wrenches. The sizes vary, but for the most part, its 15mm, 16mm, or 17mm. You will need to remove the locknuts, washers, and bearing cones from either one side or both sides of the hub. This would be the time to remove the whole axle, clean out all that dirt and grime from the bearings and clean the inside of the hub. When lubricating, use a bicycle specific lubricant, for example Park Tool PolylubeŽ 1000 will work. Be sure to put plenty of lubricant on the bearings, not enough will end up causing this grinding noise again. If you have any further questions, please ask.
-Steve
