(editor note: content in progress)
The P-Series frame takes design cues from the P5 Disc and S5 Disc. Most noticeable from the prior generation P2 or P3 is the slightly sloping top tube- a good design element that should allow more riders (with short inseams) to fit the bike.
Sloping Top Tube: Small riders in the <5'2'' category may struggle to fit the last generation P2 or P3 due to standover height issues, but the new sloping top tube on the P-Series disc will help elevate this problem for smaller riders.
Add-Ons: For the first time Cervelo is including their own proprietary accessories for a model not in the "halo" price point like the P5x or P3x. For the P-Series Disc 105 Cervelo includes a downtube aero bottle, a bento box, and a rear hydration mount integrated into the saddle.
The 'Aerobottle 500' is a 500ml downtube bottle designed to integrate cleanly with the bike's seattube and downtube junction. It's relatively easy to open/squeeze while in the middle of a ride, which is more than we can say about other aerobottles. Overall we like this product, but understand its limitations: the lid is a screw top with a small opening, meaning no in-race refills will be possible, nor could you add ice to this bottle (maybe freeze some liquid in it the night before?). We use the Aerobottle 500 for sprint and olympic distance racing, and the install a traditional bottle cage on the downtube for half and full distance triathlons.
The flexible side-walled 400ml bento box bolts cleanly to the top tube, blending seamlessly with the top tube cable cover. Cervelo calls their bento box the Smartpac 400, and it's a fine product as far as bento boxes go. A single opening down the center of the Smartpac allows for easy packing and removal of your nutrition items.
Areas of Concern: