Green Eel The Green Eel is a Trek 3 series 3500 with a frame size of 21”, that means Large. It’s a great fit for someone between about 5’8″ and 6’4″. It has V-Brakes and Shimano Tourney derraileurs. Trek 3500 Alum. Fork SSR saddle Tourney Trek Front suspension Crowbar V-brakes Shimano Tourney 26” 3 Series Bontrager wheels and tires Size 21” – 53.5cm Trek 3500