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Kestrel 4000 Pro SL Triathlon TT Time Trial Tri Bike 2013-50cm

Quick Overview

Designed for the athlete seeking serious speed on the road, the 4000 is the fastest bike Kestrel has ever produced. With the aid of the A2 Wind Tunnel and a brand new carbon lay-up, the 4000 is 12% stiffer in the bottom bracket and chainstays than the 2011 model, resulting in more power to the pedals and an even faster ride. Used by top triathletes and professional cyclists around the world, including 4-time Ironman Champion Andy Potts, 2009 Giro dItalia Winner Denis Menchov, and 2008 Tour de France Champion Carlos Sastre, the 4000 is available as both a frameset and a complete bicycle.


Carbon is the fiber of our DNA Like all living organisms, Kestrel has a genetic code – a DNA – that is at the core of everything we do. We focus on four critical elements when we design our award-winning bikes: fit, material, testing, and athletes.

FIT- It’s all about harmony between rider and machine. We don’t use “open molds” on any of our framesets, forks, or components. Us ing our own molds allows for total design and performance integration. The Kestrel design process begins with determining what body position will help our riders perform their best. Kestrel’s road and tri geometries have been refined over two decades with input from athletes and fit experts in the industry, and our geometries are designed to fit a wide range of customers: weekend riders to full-time pros.

MATERIAL- Carbon is the backbone of every Kestrel—it has been since 1986. Kestrel uses two grades of carbon: 700K & 800K. The 700K is all muscle. Less resistant to bending, it’s utilized in high-stress areas to reduce flex. And the 800K adds finesse. The lighter of the two, it’s utilized in lower stress areas to achieve the lightest possible overall frame weight. Each model employs a unique blend of these two fibers to create a powerful yet light weight bike.

TESTING- Kestrels aren’t just tested in the wind tunnel, they are designed in the wind tunnel. That means if certain standards aren’t reached, it’s back to the drawing board. In facilities like the A2 Wind Tunnel in Charlotte, NC, the numbers don’t lie. We use extensive 3-D solid model computer drawings to produce fullscale prototypes, which we meticulously review and evaluate to search for every possible tenth of a second advantage. Testing begins at 0° Yaw and goes up to 30°. Wind speeds are set at 10, 20, and 30 MPH. And unlike most companies, we test more than just the bike – we put a rider on the bike as well as different wheels, bars, and parts, all in an effort to create the best possible package for each Kestrel frameset. Once the aerodynamics are nailed down, we simulate the most arduous riding conditions so we can refine material lay-ups and structural shapes to optimize stiffness and control.

ATHLETES- Kestrel has always been about positioning itself at the top of the sport of triathlon, and that means working with athletes in the upper echelons of the sport. From the early days when 2-time Ironman World Champion Chris McCormack rode Kestrel’s Airfoil to victory to our current Ironman Champion and U.S. Olympian Andy Potts and professional cyclists Denis Menchov & Carlos Sastre, winners of two of cycling’s Grand Tours, Kestrel’s partnership with world-class athletes continues to inspire us to make better bikes. After all, it’s in our DNA.

Additional Information

Name Kestrel 4000 Pro SL Triathlon TT Time Trial Tri Bike 2013-50cm
Frame 800K High Modulus Carbon Fiber
Fork Kestrel EMS Pro SL TT Full Carbon, 1 1/8” - 1 1/4” Tapered Steerer
Front Derailleur Shimano 105, Braze-on
Rear Derailleur Shimano 105, 10-sp
Shifters MicroShift Bar End
Crankset FSA Gossamer 50/34T (48cm, 52cm: 170mm; 55cm, 57cm: 172.5mm; 60cm: 175mm)
Brakes TRP 920 Forged Aero Center Pull
Wheelset Oval Concepts 327 Alloy Clincher, 27mm rim, 20H Front, 24H Rear
Tires Hutchinson Fusion 2, 650 X 23c; Hutchinson Atom Comp 700 X 23c
Headset FSA CX Integrated 1 1/4” Top, 1 1/4” Bottom with 10mm Top Cover and Cable Guide
Bottom Bracket Oval Concepts Integrated, External Bearings
Brake levers Oval Concepts 701
Handlebar Oval Concepts 350 6061 Aluminum Base Bar, Oval Concepts 750 60601 Aluminum Clip On
Seatpost Kestrel EMS Pro w/ Ritchey Clamp System
Saddle Oval Concepts 500 Triathlon w/ Cr/Mo Rails
Stem Oval Concepts 313 6061 3D-forged Alloy, 31.8mm +/- 6 degrees (47cm, 50cm: 80mm; 52.5cmcm, 55cm: 90mm; 57.5cm, 59.5cm: 100mm)
Cogset Shimano Tiagra, 11-25T
Chain KMC X10 Nickel-plated 10-sp
FRAME SIZE 47cm 50cm 52.5cm 55cm 57.5cm 59.5cm
Wheel Size 650c 700c 700c 700c 700c 700c
Seat Tube, Center to Center 50.5 53.5 56 58.5 61 63
Top Tube, Center to Center 50.9 52 53.5 55.2 57.5 58.6
Head Tube 10.5 11.5 12 12.5 13 13.5
Seat Tube Angle 76.5° 76.5 76 76 76 76
Forward Seatpost Effective Angle 81° 81° 79.5° 79.5 79 79
Head Tube Angle 72.5° 72.8° 73° 73.3 73.3 73.5
Chainstay 39 40 40 40 40.5 40.5
Wheelbase 95.3 97.6 98.4 99.9 102.8 103.7
Bottom Bracket Height 26.5 26.7 26.7 26.7 26.7 26.7
Bottom Bracket Drop 45 70 70 70 70 70
Stand Over Height, at Top Tube Center 68.9 74.9 76.3 77.7 79.3 79.8
Fork Rake 34.0 45.0 45.0 45.0 45.0 45.0
Trail 63.7 58.1 55.1 53.2 53.2 52
Front Center 56.7 58.7 59.5 60.9 63.3 64.2
Reach 39.7 39.4 40.3 41.8 44 45
Stack 46.7 52.5 53 53.6 54.1 54.7