al0
08-29-2005, 11:39 AM
Hi,
German TOUR magazine has made wind-tunnel test of aero wheels (TOUR 09/2005)
Some results:
Name is first column
Estimated time savings over Ksyrium SL for 40km time trial (for 300W rider) in 2nd column
Air drag of fromt wheel at 30/40/50 km/h in 3rd, 4th and 5th columns, respectively
Disk (Mavic Comete)....72 N/A N/A N/A
Zipp 808...............68 3.9 9.3 18.1
Ritchey WCS Carbon.....62 4.2 9.9 19.3
Easton Tempest II Crb..50 4.7 11.1 21.6
CKT Splendor...........50 4.7 11.1 21.7
Mavic Cosmic Crb SL....49 4.7 11.2 21.9
Campagnolo Bora G3.....44 5.0 11.8 23.0
Bontrager X Lite Crb.
Aero...................42 5.1 12.0 23.4
Tune Olympic Gold......38 5.2 12.3 24.1
Gipiemme Crb. 5-5......38 5.2 12.3 24.1
Lightweight Obermeyer..35 5.4 12.7 24.8
Corima Aero............35 5.3 12.6 24.7
Xentis Mark1...........33 5.4 12.8 25.0
Citec 3000s Aero.......31 5.5 13.1 25.5
Ambrosio X-Carbo.......01 6.8 16.1 31.5
There are much more data in a full article (graphs of a drag in cross-wind, weight, stiffness, acceleration energy ...).
What is interesting - the quite poor performance of Xentis and quite good performance of CRT (german wheels with very reasonable price ~ 1.5 times cheaper then other competitors). Sorry, but Reynolds and HED wheels have not been represented.
German TOUR magazine has made wind-tunnel test of aero wheels (TOUR 09/2005)
Some results:
Name is first column
Estimated time savings over Ksyrium SL for 40km time trial (for 300W rider) in 2nd column
Air drag of fromt wheel at 30/40/50 km/h in 3rd, 4th and 5th columns, respectively
Disk (Mavic Comete)....72 N/A N/A N/A
Zipp 808...............68 3.9 9.3 18.1
Ritchey WCS Carbon.....62 4.2 9.9 19.3
Easton Tempest II Crb..50 4.7 11.1 21.6
CKT Splendor...........50 4.7 11.1 21.7
Mavic Cosmic Crb SL....49 4.7 11.2 21.9
Campagnolo Bora G3.....44 5.0 11.8 23.0
Bontrager X Lite Crb.
Aero...................42 5.1 12.0 23.4
Tune Olympic Gold......38 5.2 12.3 24.1
Gipiemme Crb. 5-5......38 5.2 12.3 24.1
Lightweight Obermeyer..35 5.4 12.7 24.8
Corima Aero............35 5.3 12.6 24.7
Xentis Mark1...........33 5.4 12.8 25.0
Citec 3000s Aero.......31 5.5 13.1 25.5
Ambrosio X-Carbo.......01 6.8 16.1 31.5
There are much more data in a full article (graphs of a drag in cross-wind, weight, stiffness, acceleration energy ...).
What is interesting - the quite poor performance of Xentis and quite good performance of CRT (german wheels with very reasonable price ~ 1.5 times cheaper then other competitors). Sorry, but Reynolds and HED wheels have not been represented.