what size rear axle does giant stp2 hartail take?
Standard rear axle for mountainbikes10mm diameter, and you can go either quick release or solid/nutted. The spacing of your frame is 135mm, and the overall length of the axle should be the normal 146mm, end-to-end. That's pretty standard unless you have a hub/frame that's made for the larger 12mm solid axle that downhill rigs use. Hope this helps you out
