Whether you are on a road bike or a touring bike, you would get fit so the saddle, handlebars, and pedals were right in relation to your body. Though "right" may be somewhat different depending on your purpose in riding. A touring bike differs from a road bike mainly because it is built to be stable and easy to handle while carrying a load. A touring bike will have a longer wheelbase, longer chainstays, and more fork rake so that the weight of panniers will be properly supported over or between the wheels. Putting panniers on a short-wheelbase bike would make for unstable handling. The touring bike will also accept wider tires and possibly fenders. The secondary effects of the long wheelbase are more shock-absorption and a cushier but less lively ride.
If you don't plan to do loaded touring, then what you probably want is a road bike that fits you well. The more aggressive road bikes will have steeper angles and be more suited to racing. If you are looking to average 20 mph, then you want a bike that is meant to go fast but still make you comfortable. There is a big range here and only by test riding can you determine how you want to balance speed, comfort, and shock absorption and what fits and works well for your body. If you are planning on century rides, then you might edge more towards comfort and shock absorption. If you tend more towards shorter rides, you might edge more towards an aggressive geometry. But in any case, the user interface (seat, bars, pedals) have to fit you properly.
Last edited by DebW; 05-09-2007 at 08:47 AM.
Oil is good, grease is better.
2007 Peter Mooney w/S&S couplers/Terry Butterfly
1993 Bridgestone MB-3/Avocet O2 Air 40W
1980 Columbus Frame with 1970 Campy parts
1954 Raleigh 3-speed/Brooks B72