Ho trovato un nuovo test effettuato dalla rivista Tour su alcune ruote 2011.
http://forums.roadbikereview.com/wh...s-pitched-against-12-factory-ones-261933.html
The German "Tour" (issue 2011/3: "Vorsprung mit System", p. 112-122) magazine tested 4 hand built wheels againts 12 factory built ones.
The following is for the year 2011 (all the wheels are from 2011), (mm) = millimetres, (N) = Newton, lateral stiffness (front/rear).
The wheels were tested with
Continental GP 4000 S tyres. Aerodynamics is being tested by means of a wind tunnel where the angle of the oncoming wind in relation to the FRONT wheel is being altered from 0 to 25 degrees in steps of 2.5 degrees. The unit of this measurement exercise is Watts.
The wind tunnel (CMEFE) is located within the technical university of Bern in Switzerland.
Riporto alcuni risultati interessanti:
CAMPAGNOLO Shamal Ultra 2 Way Fit:
spokes: 16/21 bladed
aerodynamics (30/40/50 km/h) in (Watts): 7.2/17.1/33.5
inertia (Joule): 109
lateral stiffness (N/mm): 47/44
dimension (width x height) in (mm): 20.7 x 23.3 (28 rear)
weight (front/rear/quick release) in (gramms): 618/829/121
CAMPAGNOLO Zonda:
spokes: 16/21 bladed
aerodynamics (30/40/50 km/h) in (Watts): 6.9/16.3/31.8
inertia (Joule): 117
lateral stiffness (N/mm): 50/49
dimension (width x height) in (mm): 20.5 x 23.5 (27.6 rear)
weight (front/rear/quick release) in (gramms): 660/835/121
FULCRUM RACING 3:
spokes: 18/20 bladed
aerodynamics (30/40/50 km/h) in (Watts): 6.8/16.1/31.4
inertia (Joule): 119
lateral stiffness (N/mm): 51/48
dimension (width x height) in (mm): 20.6 x 23.3 (27.3)
weight (front/rear/quick release) in (gramms): 659/900/121
Sono rimasto un pò sorpreso dai risultati:le Zonda e le gemelle R3 risultano essere più aerodinamiche e più rigide delle Shamal,pagano soltanto un pochino in relazione all'inerzia,solamente perchè un pelo più pesanti(117 contro 109 delle Shamal).