Integy Proline designed for use with the 23mm Heavy-Duty 40 series wheels are constructed of aluminum and blue in color. Larger hex size than stock for unbeatable performance and enhanced durability. Converts the stock 20mm wheel hex to a beefy 23mm. Easy installation. This product includes four hex adapters and four wheel nuts. Eight 16mm diameter rubber o-rings.

Proline 40 series wheels and tires