A wheelchair comprises a base assembly and a tilt assembly detachably supported on the base assembly. The base assembly has a mounting point that receives the tilt assembly and a latch receiver that engages a latch assembly of the tilt assembly. The wheelchair further provides a fore and aft adjustment of a seat mounted to the tilt assembly and an angular adjustment of the seat relative to a rocker of the tilt. Each of the fore/aft seat adjustment and the seat angle adjustment relative to the rocker is independently adjustable. The rocker position of the tilt assembly relative to the base is unchanged when either the seat longitudinal position or angular position is adjusted.