Select the amount you would like to donate to Sergei Viskovatykh's 50 mi challenge.
Calculate your donation based on an amount per-mile Sergei Viskovatykh has committed to ride this September. Your total donation will be the amount you select multiplied by Sergei Viskovatykh's 50 mi challenge goal and will be charged up-front.
A receipt will be sent to this email address
