Mountain bikes can be classified into four categories based on suspension:·
Fully rigid: A frame with a rigid fork and fixed rear, no suspension. ·
Hardtail: A frame with a front suspension fork and no rear suspension. ·
Soft tail: A frame with small amount of rear suspension, activated by flex of the frame instead of pivots. ·
Dual or full suspension: A front suspension fork and rear suspension with a rear shock and linkage that allow the rear wheel to move on pivots.