The last few years my weight has stayed firmly in the 255-265 range. I did ride over 1100 miles this year in a minor cycling comeback but this has not been enough to offset my love of ice cream in the evening
I am on a 2 bike rotation right now, a fairly modern aluminum Flyte SRS-3 and an older Japanese 1980's era "Saint Tropez" bike built with Ishiwata chromoly frame tubing. I love how the Saint Tropez takes bumps and has great manners, its comfortable for long rides etc... Unfortunately I've noticed that when I attempt any amount of climbing out of the saddle, the bottom bracket flex is ever present. Since I'm just doing fitness riding on my own its usually no big thing. I just sit back down and carefully trim the front derailleur to eliminate the rub. My Mavic down tube lever moves the front derailleur quite a bit with only minute movements (I'm not using integrated shift/brake levers on this bike).
So my question is. How do my fellow clydes handle bottom bracket flex with subsequent need to trim the the front derailleur when over torquing the bottom bracket area?
Does anyone know of a (vintage) steel frame I could seek out that is better in this regard? I've seen the Merckx MX Leader or other frames build with Columbus MAX or MXL (not sure if I have these designations right). Any domestic framebuilders that work with these frame tubes?