CAT 308ECR Bottom Roller | Part #127-3806

This bottom roller / track roller is listed for the Cat 308ECR and matches OEM Part #127-3806. Before ordering, compare your machine make, model, serial number, and existing part number to confirm the correct undercarriage position and fitment.

Matching rubber track options connected to this Cat 308ECR undercarriage setup include CAT 308ECR Rubber Tracks | 450x81Nx78 (Part #450X81NX78). If you are replacing this part, inspect the full undercarriage so the new component and rubber tracks wear evenly together.

Yes. Sprockets, idlers, rollers, and rubber tracks wear together as a system. Before replacing this part for the Cat 308ECR, inspect the full undercarriage for uneven wear, bearing play, hooked sprocket teeth, and track tension issues.

Confirm fitment by checking your machine make, model, serial number, and existing track size or OEM part number. For rubber tracks, verify width, pitch, and link count. For undercarriage parts, compare the part number, bolt pattern, tooth count, and machine position. You can also use the TrackTECH Track Finder or call (850) 816-7898 before ordering.

TrackTECH ships rubber tracks and undercarriage parts quickly across the Lower 48. Heavy items typically ship by freight, while smaller undercarriage parts may ship by parcel depending on warehouse availability. Review TrackTECH shipping information or contact us before ordering if you need priority freight options.