Bulk Technical Part Rubber Stopper Chain Link Grip Caterpillar Track Attachmen Brick 24375 Compatible With Lego Building Block - Model Building Kits - AliExpress
Tread with 34 Treads Technic : Part 680c01 | BrickLink
LEGO PART 14149 Technic Rubber Foot for Chain Tread 38 | Rebrickable - Build with LEGO
25 Lego RUBBER Grips for Tread Links (attachment,track,ev3,inserts,robot,tank) | eBay
Performance test: LEGO bare tracks VS LEGO tracks with rubber attachments - YouTube