05-20-2010, 03:39 AM
Hi all. My bike is Santa Cruz Blur with Mavic wheels and Juicy 7 disc brakes. I hear a strange sound coming from the rear of the bike whenever I hit about 22-23 mph. This sound is pretty consistent whenever I reach this speed. The sound can best be described as "metallic singing/rattling sound." I cannot seem to duplicate this sound when the bike is on the stand. I initially thought that the rotor was vibrating and hitting the pads but the rotor does not seem to be loose. I "plucked" all my spokes but cannot seem to get it to make that same sound. Does anyone have any thoughts as to what is causing this sound or how I can trouble shoot it? Thanks.