General Information
***The water bottle has been modified to house Di2 battery, junction, and wires and does NOT function as a water bottle***
While outlandish claims fly in the world of “superbikes”, the quiet redesign of the P4evo keeps it firmly atop the ranks for the ultimate in TT/Tri bike design. 25 upgrades including a better IBT rear brake, ICS3 cable routing, more secure seatpost clamping and improved downtube & seattube shapes help it to remain the fastest in Cervelo's latest test of all the newest TT/Tri bikes. Faster than ever while easier to set-up and maintain, a golden combination. The P4 is part of the P-series, made for the timed solo effort from prologue to the Race Across America and from sprint triathlon to Ironman.
Characteristics:
TECHNOLOGY
P4 Aero Seatstays
- TrueAero shapes in the direction of the airflow (horizontal)
- Minimal legal width (10mm)
- Integrated "Shoulder" intersection (parallel to the airflow) with the seattube for minimal frontal area
TrueAero Shapes
- Long-tail airfoils with a 3:1 ratio or better create the lowest drag
- Truncation can be useful, for example if flow interacts with another object.
Smartwalll for Carbon
- Carbon strength & stiffness depend on the size, shape, material & fiber direction of each of the 300+ pieces of carbon in a frame
- Cervelo's Smartwall lay-ups are based on 15 years experience and the most advanced tools, including in-house developed optimization software
- Smartwall also puts extra carbon on the sides (far from the center plane) to increase stiffness at little extra weight.
Aero Chainstays
- Used on S3 and P4
- TrueAero shapes in the direction of the Airflow
- Especially effective in cross winds.
Aero Headtube
- The narrow section between the bearings reduces the frontal area and thereby the aero drag (which is linearly related to the frontal area)
- Narrowing this area also improves the headtube's aspect ratio (same gusset length divided by a smaller width renders a higher ratio) to get closer to a 3:1 airfoil.
Internal Cable Stops ICS3
- With ICS3, Cervelo continues to lead the industry in internal cables
- No housing inside the frame gives crisper shifting and 200 grams less weight.
- New stainless steel internals with replaceable Teflon liners further reduce the friction.
- Integrated toptube adjuster allows on-the-fly fine-tuning. A first for internal cable systems.
P4 Rear Wheel Cutout
- The P4 rear wheel cutout iss roughly the same size as the P3 cutout, but with two distinct:
Integrated Hydration (***Not functional as a bottle - Modified to house Di2 battery, junction, and wires***)
- The shape of the P4 water bottle is fully integrated into the frame shape.
- It creates one, long airfoil shape, which actually lowers the drag compared to having no bottle at all.
- The design was banned by the UCI for decreasing drag, but it is fully legal in all triathlons. For UCI racers, a Profile Design or Arundel aero bottle in that area is almost as fast.
IBT Integrated Brake Technology
- Cervelo was the first to integrate a brake into the chainstays (not hanging it underneath where it may be invisible but fully exposed to the airflow).
- Redesigned for 2011:
Dropped Downtube
- Maving the downtube closer to the front wheel allows for a smooth airflow from wheel to frame.
- The downtube has a full TrueAero shape (no-cutout) because the wheel is almost never exactly in line with the downtube (constant steering corrections).
- The dropped downtube also fairs in the space behind the fork crown to reduce turbulence.
Integrated Seatpost Clamp
- The integrated clamp is invisible to the airflow
- The seatpost is aerodynamically integrated, but structurally separate.
- This offers:
While outlandish claims fly in the world of “superbikes”, the quiet redesign of the P4evo keeps it firmly atop the ranks for the ultimate in TT/Tri bike design. 25 upgrades including a better IBT rear brake, ICS3 cable routing, more secure seatpost clamping and improved downtube & seattube shapes help it to remain the fastest in Cervelo's latest test of all the newest TT/Tri bikes. Faster than ever while easier to set-up and maintain, a golden combination. The P4 is part of the P-series, made for the timed solo effort from prologue to the Race Across America and from sprint triathlon to Ironman.
Characteristics:
- Cervelo’s tried and true geometry, putting the rider in a fast and comfortable position.
- Aerodynamic design to reduce drag resistance and increase speed.
- Handling and stiffness characteristics straight from the road models
TECHNOLOGY
P4 Aero Seatstays
- TrueAero shapes in the direction of the airflow (horizontal)
- Minimal legal width (10mm)
- Integrated "Shoulder" intersection (parallel to the airflow) with the seattube for minimal frontal area
TrueAero Shapes
- Long-tail airfoils with a 3:1 ratio or better create the lowest drag
- Truncation can be useful, for example if flow interacts with another object.
Smartwalll for Carbon
- Carbon strength & stiffness depend on the size, shape, material & fiber direction of each of the 300+ pieces of carbon in a frame
- Cervelo's Smartwall lay-ups are based on 15 years experience and the most advanced tools, including in-house developed optimization software
- Smartwall also puts extra carbon on the sides (far from the center plane) to increase stiffness at little extra weight.
Aero Chainstays
- Used on S3 and P4
- TrueAero shapes in the direction of the Airflow
- Especially effective in cross winds.
Aero Headtube
- The narrow section between the bearings reduces the frontal area and thereby the aero drag (which is linearly related to the frontal area)
- Narrowing this area also improves the headtube's aspect ratio (same gusset length divided by a smaller width renders a higher ratio) to get closer to a 3:1 airfoil.
Internal Cable Stops ICS3
- With ICS3, Cervelo continues to lead the industry in internal cables
- No housing inside the frame gives crisper shifting and 200 grams less weight.
- New stainless steel internals with replaceable Teflon liners further reduce the friction.
- Integrated toptube adjuster allows on-the-fly fine-tuning. A first for internal cable systems.
P4 Rear Wheel Cutout
- The P4 rear wheel cutout iss roughly the same size as the P3 cutout, but with two distinct:
- The front of the seattube is truncated near the bottom to integrate the water bottle (Cervelo or other aero models)
- Near the top, the seattube integrated with the seatstays "shoulder" design.
Integrated Hydration (***Not functional as a bottle - Modified to house Di2 battery, junction, and wires***)
- The shape of the P4 water bottle is fully integrated into the frame shape.
- It creates one, long airfoil shape, which actually lowers the drag compared to having no bottle at all.
- The design was banned by the UCI for decreasing drag, but it is fully legal in all triathlons. For UCI racers, a Profile Design or Arundel aero bottle in that area is almost as fast.
IBT Integrated Brake Technology
- Cervelo was the first to integrate a brake into the chainstays (not hanging it underneath where it may be invisible but fully exposed to the airflow).
- Redesigned for 2011:
- Easier set-up and Serviceability
- Better compatibility with wider rims
Dropped Downtube
- Maving the downtube closer to the front wheel allows for a smooth airflow from wheel to frame.
- The downtube has a full TrueAero shape (no-cutout) because the wheel is almost never exactly in line with the downtube (constant steering corrections).
- The dropped downtube also fairs in the space behind the fork crown to reduce turbulence.
Integrated Seatpost Clamp
- The integrated clamp is invisible to the airflow
- The seatpost is aerodynamically integrated, but structurally separate.
- This offers:
- Maximum seat height adjustability
- Easier travel and resizing / resale
- Lower weight compared to integrated seatmasts.