Camburg 2.50 Race Series Rera Hub Kit - 6x5.5/40spOur race and championship winning Camburg 2. 50 full float rear hubs are a great setup for race trucks and serious PreRunners. They are available in 5 on 5. 5? and 6 on 5. 5? bolt patterns along with the larger 6 on 6. 5? racing bolt pattern with 35 or 40 spline drive plates. Our 2. 50 lightweight rear hub design has a wide bearing spread for increased strength and longevity. We also use larger 7? and 8? round material for the hub body for increased