Byron is a large bulldozer with a big blade. He carries out bulldozing work along with leveling the ground.
Byron can be a bit pompous and loud, but likes to be useful. He is enthusiastic, reliable and wise.
Byron is yellow with a black cab with a number 18 painted on the sides of his cab in yellow.
- Season 6 - Jack Jumps In and A Friend in Need (cameo)
- Jack and the Sodor Construction Company - A Visit from Thomas (cameo), Jack Owns Up (cameo), On Site with Thomas, A Happy Day for Percy, Percy Helps Out (cameo), and Mud, Glorious Mud (cameo)
Byron also appeared in two ninth season music videos.
- Ryōichi Tanaka (Japan; sixth season only)
- Byron is one of the machines whose silhouette is pictured on the Pack's logo.
- Byron did not have his number in Robert Gauld-Galliers' original artwork.
- Wooden Railway (discontinued)
- Take Along (discontinued)
- Wind-up (Japan only)