This form is for entering an optional rider mass for an overall ranking based on product of VAM and rider mass. Enter rider number (sticker number), mass (the number only), then select the units. Mass should be measured naked, not counting the bike or other bike-related equipment. So if a rider weighs 175 lb, he could enter mass as "175", then select "lb" from among the units.
We use only one weight per person for the entire series, so going on special training regimes involving milk shakes and beer to improve your score is not advised.