Tread Trekker

What there is most of

• Technic Bush · Light Gray×15
• Technic Bush 1/2 Toothed Type II [X Opening] · Light Gray×14
• Technic Axle 2 Notched · Black×12
• Technic Pin with Friction Ridges Lengthwise and Center Slots · Black×8
• Technic Axle 8 · Black×6
• Technic Axle Pin without Friction Ridges Lengthwise · Light Gray×6
• Plate 1 x 6 · Red×5
• Technic Axle 6 · Black×5
• Technic Axle Connector Ridged [with x Hole x Orientation] · Light Gray×5
• Brick Sloped Inverted 45° 2 x 1 · Red×4
• Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] · Red×4
• Technic Axle and Pin Connector Angled #5 - 112.5° · Light Gray×4
• Technic Axle and Pin Connector Perpendicular · Light Gray×4
• Technic Axle Connector with Axle Hole · Light Gray×4
• Technic Engine Crankshaft · Light Gray×4
• Technic Pin 3/4 · Dark Gray×4
• Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots · Black×4
• Technic Tread Hub · White×4
• Technic Axle 4 · Black×3
• Technic Brick 1 x 2 [1 Pin Hole] · Red×3

The twenty most numerous parts, longest bar first. Start a checklist to see all 57 part types and tick them off as you find them.