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Cervélo PX-Series Triathlon Bikes

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The 2019 - 2020 Cervélo PX-Series



Cervelo R5 Bike


Cervélo has taken triathletes to new levels with the P5X. The radical new design provides better aerodynamics and more stiffness in the head tube and bottom bracket while greatly increasing vertical compliance for superior comfort. Storage capacity is integrated into the frame and customizable so you can dial in your setup. The result of all these innovations is the ultimate triathlon bike to train and race with. P5X will give you the edge you need to reach your goals.

Frame Details

The P5X features a unique frame design without a seat tube or chain stays. This design, combined with special lay ups create 10 times more vertical compliance than the P5 so you can stay comfortable and reduce fatigue. With aero drag producing up to 90% of the overall resistance a rider experiences, Cervélo has made sure to incorporate the bike, rider, and storage into one incredibly aerodynamic system so you and everything you need on race day have as little resistance as possible. When set up for an Ironman, the P5X is 31 grams (4 watts) faster than the P5, and 25% stiffer at the head tube. When it's time to travel, Cervélo's split base bar allows you to pack the bike without having to remove the brake, fork, or stem. Modular storage allows you to carry up to 3 water bottles in adjustable cages, and there is a removable storage box on the top tub and down tube as well as a bento box for all your in-ride nutrition.

Brake/Drivetrain Options

The P5X uses Shimano disc brakes and comes in two drivetrain options: Dura Ace Di2 and Ultegra Di2. 

P5X Disc/Dura Ace Di2

Price: $16,000

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P5X Disc/Ultegra Di2

Price: $12,000

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Frequently Asked Questions

What are the advantages of electronic shifting?

Electronic shifting is slightly faster and more precise than mechanical shifting. After initial setup, electronic shifting requires little-to-no maintenance, and the physical operation of the buttons and levers require less force. Instead of pushing the shift lever further in to change multiple gears, with electronic shifting you only need to hold down the button. By programming the front and rear derailleurs during setup, the front derailleur shifts slightly differently depending on which cog you're in so there is never any chain rub. Electronic shifting is also customizable, and there are more options for shifting positions. 

What are the differences in Cervélo's drivetrain options?

For Shimano, the highest level groupset is Dura-Ace, followed by Ultegra and 105 respectively. Dura-Ace and Ultegra provide the same levels of performance and durability, but the means and materials of production are slightly different, which makes Ultegra slightly heavier and allows for lower price points. Both are available for rim and disc brakes, and both are available in electronic form, or Di2. As you go down the Shimano hierarchy from there, performance and durability is affected, weight increases, and price drops.

Red eTap AXS is Sram's chief groupset, and it's the only Sram model found on Cervélo bikes. Red eTap AXS is compatible with rim and disc brakes.

The biggest difference from Shimano's Dura-Ace is that Red eTap AXS is completely wireless, where as Shimano's electronic shifting is currently accomplished via wires. Performance between the two top groupsets is largely believed to be very similar, although the act of engaging the shifting is accomplished differently. Shimano allows for a high degree of customization in shifting behavior, while Sram keeps it simple and allows for easy setup. Many are split on the two, so the best advice is often to test ride both if you can.

How is frame stiffness measured, and why does it matter?

Stiffness leads to efficient power transfer, responsive handling, and a predictable and stable feel when cornering at speed. Though extensive real-world testing, Cervélo has concluded that there are 3 kinds of stiffness that matter most to a rider: torsional stiffness, bottom bracket stiffness, and vertical stiffness. Through these tests, Cervélo is able to stiffen certain areas of the frame that encounter the most force and lighten areas where stiffness and strength won't be affected. Cervélo also puts their frames through much more rigorous strength testing that industry standards so you can enjoy top quality performance and the peace of mind you need to focus on your riding.

How does Cervélo measure a bike's weight?

The weight specs on a Cervélo describe that bike in its complete form. No unpainted frames and no missing hardware or components. With frameset or "module" weights becoming more common, it's nice to see a company be so straightforward and open. The weight of a Cervélo bike is simply how much the whole thing weighs, in its ready to ride form.

What kind of carbon does Cervélo use, and is it better?

While all bike manufacturers have access to the same carbon fiber, what's more important is how and where it's used. Terms like "super high-modulus" (the engineering term for a material's stiffness) can be deceptive because there isn't a universal modulus scale. Cervélo's analogy goes like this: a rubber band can be thought of as low-modulus and uncooked spaghetti is high-modulus. Uncooked spaghetti is very stiff, but breaks under less pressure than a rubber band, which is much stronger. Cervélo takes a methodical, scientific approach to its design, and uses results from the lab and real life testing to determine where and how to use its carbon fiber. When you buy a Cervélo, know that your frame is constructed to provide optimum stiffness, strength, and compliance where they matter most so every aspect of your ride is improved.

What kind of warranty does Cervélo offer?

All Cervélo frames come with a lifetime limited warranty for the original owner.