This is the headset that fits your 1st generation Mojo HD, Mojo HDR, Ripley/Ripley LS, and Tranny 29. ZS Upper and EC lower cups.
We also offer the headset needed for the newer generation bikes that use a zero stack upper and lower cups. Those models are the HD3, Mojo 3, HD4 & RipMo.
Zero stack 1 1/8" upper and traditional 1 1/2" press-in lower. Comes with a 1.5" crown race.