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.
|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|
|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|
|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|
|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|