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Rattling 105(4 posts)

Rattling 105joerey
Sep 2, 2003 10:15 AM
There's a very annoying rattle coming from inside the forward gear box of my new Shimano 105's. It sounds like a jingling nut or loose screw whenever I ride on a slightly rough road. I can't stop it if I grab around the gear box/handrest. I can reproduce it somewhat by dropping the front of the bike a few inches. The dealer says this type of rattle is normal, I say "no way". I doesn't happen at all on the other side. Opinions? (BTW - I'm not the loose screw - really!)
re: Rattling 105flakey
Sep 2, 2003 6:48 PM
Just an idea, but you may want to check your brake cable and housing. If the housing is binding the inner cable, it may be preventing the return spring of the brake caliper from pulling the cable all the way back. This could allow a slight movement back and forth of your brake lever or the swiveling barrel inside the brake lever that holds the brake cable head. I know for sure this happens on a DIFFERENT brand of brake/shift levers, so maybe this is whats happening with yours.
It is normal, but that doesn't make it rightKerry Irons
Sep 3, 2003 4:42 PM
This is a common problem, so your dealer says it's normal. That's a little like saying that SUVs roll over easily (a problem) so if yours rolls over, it's normal. Look for a small, loose screw inside the lever. Also look at the "cap" that covers the front of the lever. These are two common rattle sources. People have glued the cap with bathtub caulk, and putting the screw back in solves that problem.
Sep 4, 2003 4:42 AM
The dealer agreed to install a new gear shifter (It's under warantee so I guess Shimano pays the labor) and I get the bike back today. While I was hanging around the shop, I tried to reproduce the rattle on several bikes on the floor. Sure enough, most of them had the same rattle, always in the forward shifter, never the rear. Seems like a strange engineering or manufacturing shortcoming. Like you say, it may be normal, but it's definitely not right.