Well, you make a good point expressing your understanding of why the seatpost is a dual position model. I'll add to the list of reasons why I think this is a good idea:
Tom Demerly
The Tri Shop.com
- There is a succesful precedent for a multi-geometry seatpost construction in the industry already.
- The multi-geometry design gives customers something they think they want: Versatility. Whether or not they will go between a slacker and steeper seat configuration is tough to say. I wager they won't. Their fitter will likely position them steep and leave it at that. However, the flexibility to choose is something I think is wise to design in and something consumers will appreciate.
- Who knows where saddle design will go or what a customer will want to use. If a guy wants to use an ISM Adamo they will likely need it positoned in the rearward clamp even if they sit steep. You sit off the nose of this type of saddle. Also, with several new 30cm long saddles (as opposed to more tradtional 27cm saddles) such as the Profile Tri Stryke and the Fizik Arione Triathlon the chances of actually using the rearward clamp are actually reasonable for riders with a really long femur.
- From a sales perspective and for Felt dealers, this adds a lot of versatility that makes the dealer comfortable with flooring more bikes. He feels (somewhat rightfully so) that he can adjust the geometry. This means the bike has a wider "fit band" and one bike isn't married to a given geometry or fit philosophy. Imagine the controversy if the thing just had a fixed 78 degree seat angle with an aero, zero setback seatpost... People would freak.
Tom Demerly
The Tri Shop.com