Donation Amount

Select the amount you would like to donate to Tanner Koester's 100 mi challenge.

$50

$100

$250

$500

$1,000

Other

Donation Calculator

Calculate your donation based on an amount per-mile Tanner Koester has committed to ride this September. Your total donation will be the amount you select multiplied by Tanner Koester's 100 mi challenge goal and will be charged up-front.

$0.30 cents/mi

$0.50 cents/mi

$0.80 cents/mi

$1/mi

$1.50/mi

$2/mi