My summer commuter bike weighs 15 pounds with pedals. Full carbon road bike with a Record drivetrain & carbon tubular wheels. I have a 40 minute commute each way, with restrooms and water enroute. So I don't even have water bottle cages. I carry a spare tubular tire and a mini pump, essentials tool kit and a cell phone in a small backpack. In the last 10 years I have only had to use the cell phone once to hail a cab, when my spare tire proved to be faulty.

My winter bike is a steel-framed flat-bar custom with an Alfine hub, Vittoria Randonneur clincher tires and enough lights on the bar to cast shadows a block away. I'd guess it weighs close to 30 pounds. 700c wheels of course. Riding on either pavement or smooth gravel, there is no point in suspension that drains pedaling energy due to suspension bob, and also adds lots of useless weight. Riding suspension forks in the rain will also cause them to eventually fill up with water which will turn them into a corroded, seized mess.

Switching from the summer to winter bike is wretched misery. If you haven't ridden a 15 pound bike, you may not want to. It is is a life-altering experience that will spoil your tastes forever.

The shop is right.