I'm no connoisseur of bikes, but I can now relate to this. I own a '94 Trek 730 and in 2005 I bought a Raleigh C500, well just recently it died on me (needs a lot of repairs -- money). So for now I went back to riding my Trek which has a CroMo frame http://www.bikepedia.com/quickbike/B...=730&Type=bike as opposed to the 7005 aluminum frame of the Raleigh C500 http://www.roadbikereview.com/cat/la...2_5672crx.aspx

I don't know when I first noticed the flexing feel of that bike (C500), but I remember on a few occassions looking for cracks in the frame and always keeping the tires inflated a little above the max to reduce the flexing sensation -- there are no shocks on this bike. When I started riding my Trek 730 again I realized that the flexing I was feeling in the C500 was actually the frame, because the Trek 730 had no flexing whatsoever. It feels so good to ride a bike that doesn't have a performance-stealing flex. Now I just need to find one with a 52 chainring