- Can be used with round spokes and aero spokes. Tighten the installation with a monkey wrench. Choose between 4mm and 7mm sizes from the distance to the speed sensor. Please note that squeezing too hard may damage the spokes. ■ If the width of the aero spokes is less than 0.1 inch (3 mm) (such as SAPIM CX-RAY), it may not be parallel to the sensor and may have a slight angle. The magnetic force is strong, so it does not affect its functionality. The color of the product may look different from the actual product depending on your display settings. We cannot accept returns or exchanges due to color differences. In addition, please note that the product specifications and logo design are subject to change due to improvements.