If you're running any of Mavic's new R Sys wheels or the Ksyrium SLR, you've surely encountered some problems in the compatibility department. Namely, this issue becomes apparent in the use of spoke magnets. Why Because Mavic's carbon Tracomp spoke shape doesn't accommodate the use of standard spoke magnets. However, Mavic has a solution for you beyond the fleeting euphoria of cursing and wailing the R Sys Spoke Magnet. This magnet is quite small, yet amazingly powerful. So, you'll find that it effectively pairs with nearly any bike computer. The Mavic R Sys Spoke Magnet is available in one size and one color. Please note that this magnet is only compatible with the following Mavic wheels: R Sys SLR, R Sys, and Ksyrium SLR.