Test Results!

 

Spoke Counts Used in Our Testing

1.) Rims such as XNG!, Corina, or Zipp 440: All rims were built into wheels using 18 wire spokes
2.) Wheels such as Compagnolo Shamal or Trek Rolf with wire spoke: The lowest offered by the manufacturer.
3.) Wheels such as Specialized or Spinergy with composite spokes: Manufacturers' Design.

Comparison Based Testing / Comparison Based Results

Our comparative tests do not relate to an industry standard such as helmet testing does. No industry standard has been established for high performance wheels and rims such as these. All models sold as rims were built into wheels using identical hubs and radically laved spokes when possible (spoke tension = 125 kg or 275 lbs at 75F) The tires used were Continental 19 mm GP tubular or Continental 19 mm Grand Prix Kevlar beaded clinchers. The tires were pressurized with nitrogen to 10 bar or 145 psi at 75F.

Aerodynamic Data
We acknowledge tat tare data representing greater than 10% of the total drag introduces tremendous potential for disputable results. Due to the very low drag of ANY bicycle wheel the tare of the fixture used in any test method will typically exceed 10% of the total drag. All results should be interpreted in a relative manner. The three disk wheels represented in this chart are included to allow for the normalization of our results with other wind tunnel tests.
Brand 0 Yaw 5 Yaw 15 Yaw 30 Yaw Side Force (45)  
XNG! 55 61 74 80 344 Wheel Speed = 29 MPH

Air Speed = 29 MPH

Drag at 0, 5, 15, 30 yaw measured
in the plane of the wheel in grams
( Test Error 5 grams )

Side Force drag measured in
the plane of the wind in grams
( Test Error 10 grams )

Note: The lower the Side Force, the less effect a cross wind has on bicycle handling.

 

 

 

 

 

 

 

All of the information contained herein
is accurate to the best of our knowledge.
All names and trademarks, other than XNG!,
contained herein are the sole property of
their respective owners and XNG! makes no
claims to their use. All information contained
herein is furnished without guarantee or
warranty, expressed or implied, in fact
or by law. It is not intended as data of
specification from or through promise,
affirmation or description, for sale,
or for inducement to sell. Nor does it imply
fitness of merchantability for a general or
particular purpose. XNG! does not assume
any legal responsibility for use or reliance
upon the same. Customers are encouraged
to conduct their own research and compile
their own data.

All prices and specifications are subject
to change without notice.

Campagnolo Shamal 52 61 78 88 346  
Campagnolo Vento 53 63 80 93 355  
Mavic Pro 53 64 79 92 349  
Campagnolo Bora 55 68 81 94 346  
Corima 55 68 81 94 346  
Mavic Expert 56 69 84 103 358  
Gipiemme 57 70 80 88 347  
Ambrosio 57 70 80 87 348  
Torelli Wide Guy 57 65 85 96 350  
F.I.R. 57 70 80 87 346  
Zipp 340 65 67 77 81 338  
Am Class Vrim low profile 65 67 77 81 338  
HED CX 67 69 78 85 369  
HED Jet 68 70 78 85 372
Zipp 440 68 70 80 88 370  
Am Class Vrim Tubular 68 70 80 88 370  
Zipp 530 68 72 81 89 378  
Am Class Vrim Clincher 68 72 81 89 378  
Giant Carbon Road 68 71 77 97 431  
Cosmic Carbon 68 71 78 86 370  
Zipp 950 flat disk 75 70 60 211 1422  
HED Flat disk 77 71 57 200 1387  
Mavic Comete flat disk 77 73 57 204 1394  
Specialized Ultralight 78 72 70 68 460  
Nimble 79 74 70 64 383  
Aerospoke 79 92 99 109 411  
Spinergy Rev-X 84 73 71 70 457  
Corima 4 spoke 94 88 80 74 526  
Trek/Rolf 98 107 110 114 383  
Spengle 3 spoke 108 101 94 89 399  
Wheelsmith Accelerator 111 121 134 141 331  
Cane Creek Crono 112 121 135 142 330  
Mavic Helium 233 238 244 249 317