A NEW APPROACH TO SPEED: ESX

One look at the new ESX, and you know what this bike is about. It looks fast. And as the wind-tunnel data proves, it is fast. The most radical design ever created by Parlee took years to develop —and when it comes to performance, we’ll put it up against any other aero road bike on the market.

Every road rider is drawn to the promise of more speed. Ride faster with less effort? Sure, who doesn’t want that? That’s the whole idea behind the “aero road” bike category.

The question is, at what cost? What will you sacrifice to improve aerodynamic efficiency? Until now, the answer to that question has been pretty predictable. Ride quality gets sacrificed. As aero performance goes up, comfort goes down. Most aero road bikes put speed first, comfort last. Maybe pros can live with that on race day, but it’s less than ideal for an everyday road bike.

That’s not a trade-off that Parlee has ever been willing to make. We built our name on delivering superior ride quality. It’s what sets us apart. And it’s what led to the creation of the ESX.

Several key technologies put this new bike in a class of its own. Its sleek, wind-cheating profile starts with a patented tube technology called Recurve. Bob Parlee’s background in designing and fabricating boats served this project well. His experience creating shapes and sections that move through fluid with optimal efficiency helped inform the design process of Recurve tubing. With its unique “fluted tail” shape, Recurve delivers the ideal blend of low drag and high torsional stiffness—along with road-smoothing comfort that is so often lacking in aero bikes.

The other factor that was deemed critical from the start of the ESX project was weight. The typical way to improve aerodynamics is to create airfoils and added shapes—but a big part of the signature Parlee ride quality centers around a lightweight chassis. Adding material to create airfoils, or to shore up stiffness, wasn’t an option. In the end, after many prototypes and iterations, the design team was able to achieve its goal of hitting all the aerodynamic goals with a frame that still has excellent torsional stiffness and weighs less than 950 grams.

All of the details on the ESX frameset contribute to its overall feel on the road. It features added clearance for larger 25-28c tires, which optimize speed and smoothness for all road surfaces. And its Recurve technology seatpost is available in 0 and 25mm setback sizes so you can dial in your position.

Hidden cable routing for electronic or mechanical drivetrain systems comes standard, and the frame can accommodate internal Di2 batteries. The all-carbon PressFit 30 bottom bracket produces maximum pedaling stiffness and power transfer. The frame features direct mount, aerodynamic, integrated front and rear brakes.

Finally, the ESX is available in five Flex-Fit sizes, with 10 unique stack-and-reach combinations for a perfect fit.

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Geometry/Tech

Standard Features

ESXStandard Features
DESIGN:Compact, aero road geometry
TT SLOPE:9 degrees
TUBING:PARLEE High Mod, ESX Recurve
SEAT STAYS:Twin carbon, ESX Recurve
TIRE SIZES:20-28mm
SEATPOST:ESX Recurve Carbon, 200g, 0mm or 25mm offset (included)
CABLING:Full internal, mechanical and Di2/EPS compatible
BOTTOM BRACKET:Press Fit 30 (68mm x 46mm)
DROP OUTS:Carbon, replaceable hanger, quick release
BRAKES:Caliper, direct mount, internally routed
FRONT DERAILLEUR:Braze-on (replaceable)
STANDARD FINISH:Matte Black/Ghost Platinum Logos
OPTIONAL FINISHES:Custom finishes available
FRAME WEIGHT:850-925g
FORK SPECS:PARLEE Carbon ESX Recurve, tapered steerer, integrated crown race, QR, 330g
HEADSET:Integrated Cane Creek, IS41 upper, IS47 lower

Sizing/Geometry

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SRAM Complete

Force22
SRAM Force RD
SRAM Force FD
Cane Creek Carbon Headset
SRAM PF30 BB
SRAM Force BB30 Crankset
EE Brakes
SRAM Force Shifters
SRAM 1170 Cassette
SRAM 1170 Chain
ZIPP Service Course Handlebar
ZIPP Service Course Stem
DT Spline R23 Wheels
PARLEE Recurve Seatpost
Fizik Arione Kium Saddle
More Info
Red22
SRAM Red RD
SRAM Red FD
Cane Creek Carbon Headset
SRAM PF30 BB
SRAM Red PF30 Crankset
EE Brakes
SRAM Red Shifters
SRAM 1190 Cassette
SRAM 1190 Chain
ZIPP Service Course Handlebar
ZIPP Service Course Stem
DT Spline R23 Wheels
PARLEE Recurve Seatpost
Fizik Arione Kium Saddle
More Info

Shimano Complete

Ultegra/Di2
Shimano Ultegra RD
Shimano Ultegra FD
Cane Creek Carbon Headset
PARLEE Shimano PF30 BB
Shimano Ultegra Crankset
Shimano Ultegra Brakes
Shimano Ultegra Shifters
Shimano Ultegra Cassette
Shimano Ultegra Chain
ZIPP Service Course Handlebar
ZIPP Service Course Stem
DT Spline R23 Wheels
PARLEE Recurve Seatpost
Fizik Arione Kium Saddle
More Info
Dura Ace/Di2
Shimano Dura Ace RD
Shimano Dura Ace FD
Shimano Dura Ace Headset
PARLEE Shimano PF30 BB
Shimano Dura Ace Crankset
Shimano Dura Ace Brakes
Shimano Dura Ace Shifters
Shimano Dura Ace Cassette
Shimano Dura Ace Chain
ZIPP Service Course Handlebar
ZIPP Service Course Stem
DT Spline R23 Wheels
PARLEE Recurve Seatpost
Fizik Arione Kium Saddle
More Info

Campagnolo Complete

Chorus
Campagnolo Chorus RD
Campagnolo Chorus FD
Cane Creek Carbon Headset
PARLEE Campagnolo PF30 BB
Campagnolo Chorus Crankset
EE Brakes
Campagnolo Chorus Shifters
Campagnolo Chorus Cassette
Campagnolo Chorus Chain
ZIPP Service Course Handlebar
ZIPP Service Course Stem
DT Spline R23 Wheels
PARLEE Recurve Seatpost
Fizik Arione Kium Saddle
More Info

ESX Press