I just took the original speedo/odometer off of my 30-year old Motobecane commuter bike this morning because while it has always made a slight ticking sound with each revolution, over the last few days it developed a loud clackety sound that was driving me crazy. My ride to work this morning was blissfully silent and I realized that virtually all of the noises I'd been attributing for quite a while to "old bike" were actually coming from this gadget. So it's not going back on the bike. I like seeing the miles tick off though, so I want to replace it with a new, simple and not very expensive computer. (Under $20, if possible.)

My question is this: Do they all--the new ones--make some kind of noise? Is one kind or the other (wired or wireless) more or less noisy than the other kind? Is there a decent inexpensive one that anyone can recommend as quiet and reliable?

Secondly: I had a handlebar-end mirror on my bike that flew off and broke last weekend, and I really miss it. I recently tried the Third-Eye Mirror, because I'd be happy to avoid having a mirror protruding from my bike, but couldn't get it to work for me because my glasses have thin wire frames and it wouldn't stay positioned properly and seemed like a huge hassle to use (like every time I put it on I'd have to spend ten minutes getting it adjusted so I could see), so I returned it.

I've read favorable recommendations here about the Take A Look mirror. My question is, has anyone used it with wire-framed glasses, and does it work better, or will I have the same problem as with the Third Eye mirror?

If so, I'll just get another handlebar mirror.