Related Clues:

• Wheelbarrow feature
• Joiner of wheels
• Railroad-car feature
• Drive-train element
• Chassis component
• "Deal" partner
• Tahoe bar, say
• Wheelset piece
• Toll-road toll unit
• Drivetrain part
• Wheel rotates around it
• Rotary object - don't reinvent it
• A wheel rotates on it
• Shaft on which a wheel rotates
• Wheel-shaft