If you have some male and female pig samples too it would be even better. I have never heard 'Dave' used as a woman's name. You've never seen me in a dress. Dave A 3v lithium cell concealed in the rear hub creates an electromagnetic field in the spokes, which are distributed tangentially and can interfere with most types of tractor beam. The polarisation of these waves depends upon the amount of wheel dish and the lacing pattern.
Shorter spokes throw off a larger field, but longer spokes throw it further.
However, the solution is easily at hand for a select few. A couple of years ago, Troxel manufactured a small number of helmets with a titanium shell which was designed with dimples like golf balls. Though purportedly these helmets are aerodynamically superior, the real reason for their manufacture was to protect against alien tractor beams. I am one of the fortunate few to be in possession of one of these helmets, and so far I have not been successfully abducted. However, lest anyone be sceptical, I can say truthfully that many times while riding, it has felt like there were Alien Tractor beams pulling me from behind, slowing me down drastically.