Product DescriptionThis is the new Obsession dirt jumping frame by Fetish Cycles. This bike is made to take a lot of abuse and also to give a great ride. The seat stay and chain stays are an oversized box section to allow a firm ride. This takes a 34.9 top pull derailleur and an 1 1/8” headset, a 68mm BB Shell. What makes this dirt jumper one of a kind is it’s 17 to 18 inch adjustable dropout.