Cervelo P4 Sizing

 

"The P4 is the biggest leap we have ever made in aero bike technology." - Phil White, co-founder

In fact, its aerodynamically invisible brake, integrated water bottle and dozens and dozens of other aerodynamic details make it so fast, that there were federations contemplating if it was too fast for their races or not. Now the verdict is in, and the P4 is legal for all races. Some road races may request that you use the standard Elite aero bottle instead of the special P4 bottle, but in all other races this very innovative P4 feature is not a problem. And with the Elite bottle, it still performs very, very well.

Upgrades from P3

Even better aerodynamics - Integrated brake, ICS2, dropped downtube, new seatstays, and integrated water bottle/storage unit (see below). Integrated Water bottle/Storage unit - The bottom bracket area is designed to accept a Cervelo water bottle or storage unit (for tires, CO2 cartridges, tools) without disrupting the airflow at all. For the few UCI races for which this Cervélo solution is considered too fast, the standard Elite aero bottle fits neatly in the same space.

Geometry

 

Cervélos fit better. In the end that is the main reason why they have become the most popular time trial & triathlon bike in history. Of course we have unparalleled aerodynamic know-how, and the frames offer great power transfer and handling. But the most important reason why people are comfortable and fast on Cervélos is that they fit properly.

Cervélo geometry offers two large benefits:

  1. It puts the handlebars and saddle in the right position relative to the bottom bracket very easily in its standard set-up, making it easy to find a fast and comfortable position.
  2. It offers a very wide range of positioning option thanks to the seatpost design and the different headtube lengths between the P1/P2 and the P3/P4. This allows our customers with a not-so-standard fit to take advantage of Cervélo’s superb aerodynamic and handling performance without any need to go custom.

p4

75 Degree Seattube Angle (rear facing seatpost position)

Size Wheel Size Head Tube Angle BB Drop Top Tube Head Tube Length Front Center Rear Center Stand Over Height Stack Reach
48 650c 72° 43 514 110 568 368 716 461 389
51 700c 72.5° 60 535 90 586 380 746 482 405
54 700c 72.5° 60 557 105 609 380 762 498 419
56 700c 72.5° 60 573 125 626 380 780 516 433
58 700c 72.5° 60 589 145 643 380 799 535 445
61 700c 72.5° 60 604 175 659 380 828 564 454
Note 1: The above headtube lengths are for integrated headsets. To compare to non-integrated headtubes, deduct 20mm from the above lengths to adjust for the stack height needed for non-integrated headsets.
Note 2: All our TT/tri bikes have a dropped toptube and shortened headtube to enable the rider to position the aerobars low enough for a proper aero position. This means that the frame size is no longer equivalent to the seattube length, so don't determine the size that way. Simply go by the size sticker, or measure the headtube and look it up in the above chart.

78 Degree Seattube Angle (forward facing seatpost position)

Size Wheel Size Head Tube Angle BB Drop Top Tube Head Tube Length Front Center Rear Center Stand Over Height Stack Reach
48 650c 72° 43 490 110 568 368 716 461 389
51 700c 72.5° 60 510 90 586 380 746 482 405
54 700c 72.5° 60 530 105 609 380 762 498 419
56 700c 72.5° 60 545 125 626 380 780 516 433
58 700c 72.5° 60 560 145 643 380 799 535 445
61 700c 72.5° 60 574 175 659 380 828 564 454
Note 1: The above headtube lengths are for integrated headsets. To compare to non-integrated headtubes, deduct 20mm from the above lengths to adjust for the stack height needed for non-integrated headsets.
Note 2: All our TT/tri bikes have a dropped toptube and shortened headtube to enable the rider to position the aerobars low enough for a proper aero position. This means that the frame size is no longer equivalent to the seattube length, so don't determine the size that way. Simply go by the size sticker, or measure the headtube and look it up in the above chart.