Gates has a set of tools for measuring the tension, one of which is an mobile phone app. You can find the download link and explanation how to use it here : www.gatescarbondrive.com/products/tools# Adjusting depends very much on the type of the frame you have. There is a version with eccentric bottom bracket housing and another version with the tension adjustment at the rear hub axle point. If you send me your email address I can send you a document with the step by step explanation of adjusting the eccentric BB housing version. Hope that this helps :)

Hi Eric No problem at all ...I am 255 pounds and ride hard. For me the biggest problem are the wheels :D