Redcat Gen8 Aluminum Portal Axle Caster Mount. These c-hubs are an aluminum option for the Redcat Gen8, or any model equipped with Redcat Portal Axles (RER11289). These upgrades will offer improved strength and durability, and will eliminate the flex associated with the stock plastic parts. Plus, these hubs will add approximately 30 grams of unsprung weight to the axle to help increase stability and overall performance. Package includes two hubs.