YOELEO M91 Ghost MTB Frame 29er Carbon Bike Frames 15.5"/17.5"/19"/21" BSA Tapered Head Tube (1-1/8",1-1/2") increases stiffness,cornering precision and feedback while riding,lowering the risk of cracking down tube/top tube at their junction with the headtube. Frame come with compatible headset and spare rear deraileur hanger set.Rear spacing is flexible (from 135mm to 142mm / 142mm to 135mm) by changing rear hangers. All inner cable routing , Size:15.5/17.5/19/21, BB:BSA 2 years warranty under proper usage