Trek Marlin 5, a reliable and well-maintained hardtail mountain bike ideal for trail riding, commuting, or weekend exploring. It has just been fully serviced, fitted with a new chain and new shifting cables, and is completely ready to ride. Key Features. Frame: 17.5″ Alpha Silver Aluminium. Wheel Size: 29″ wheels. Fork: Suntour suspension fork. Drivetrain: Shimano 3×7 with upgraded Shimano Deore rear derailleur. Brakes: Mechanical disc brakes. Tyres: Bontrager tyres with good tread. Condition: Good used condition with some chips and marks from normal riding, but performs perfectly. A solid, dependable Trek hardtail with upgraded shifting, new consumables, and a fresh service. Ideal for someone wanting a ready-to-ride MTB with no maintenance needed.