The Project Kics 10mm wide tread spacer nut is a wheel spacer-style nut introduced in 2013 to shift wheel position by 10 millimeters. Sold as a single spacer nut, it lets owners alter wheel offset slightly to achieve desired clearance or stance where a modest tread widening is needed without changing wheel dimensions.
Project Kics 10Mm Wide Tread Spacer Nut (New 2013)