http://www.treadmillreviews.net/best-treadmill/serious-runners/ http://www.treadmillreviews.net/best-treadmill/serious-runne... I see some going up to 18 mph,

http://www.treadmillreviews.net/best-treadmill/serious-runners/ http://www.treadmillreviews.net/best-treadmill/serious-runne... I see some going up to 18 mph, but they are a bit pricey :) Woodway is a popular brand for rich runners...