I got a used Trek Wahoo off of Facebook market place and I want to upgrade parts on this bike like the drivetrain and wheels. I?ve searched online and haven?t found any concrete information as how to measure for parts compatibility regarding spacing, hubs and splines. I?m a very mechanically inclined person and would rather DIY than pay someone to do it for me. I went into a local bike shop and asked some basic questions and got the nose up prick treatment. Really put me off on the biking community....