I have a commuter "mule" bicycle - 622x40 tyres, heavy, sturdy. I also have a nice road bike - 105 equipped on a Scott Speedster S20 FB frame.
I find that I very seldom ride the road bike - weekend joyrides, when I'm not hiking, or riding motorcycle. However, I love riding the road bike - feels a lot quicker.
I was thinking of adding a rack to the road bike (the frame has all the mounting holes - AND room for 28 mm wider tyres). All that I lack for commuting on the road bike is someplace to put my backpack with change of clothes, papers etc. So it would be a fair weather, quick commuter. Has anyone done such mods, is it too crazy?
2nd solution is to just sell the bike since I'm seldom riding it - but when I do it is nice, and I thought it might be OK to have a backup.