I've ridden my new '88 Centurion Ironman Expert fewer than a dozen times. It is nowhere close to the comfort and fit I have on my '79 Trek 930. Granted, it's hot season, and my riding is severely limited. It has my second favorite saddle on it, rather than the first, which is on the Trek. But the Trek was put into service in June also, last year, and became my favorite ride of all time quite quickly. Perhaps if I didn't have that experience in the background, I would appreciate the Ironman more. The frame sizes are the same; the tubing is different. Tange1 vs Columbus SL. Is this enough?