Ring & Pinion Thick Set For 10.5 Inch GM 14 Bolt Truck In A 5.38 USA Standard GearUSA Standard ring and pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of ring and pinion sets for a variety of common and hard to find applications. Fits GM 10. 5 Inch14 bolt truck 10. 50 Inch Ring Gear Diameter 30 Spline Pinion 12 ring gear bolts 5. 38 ratio Thick gear for 4. 10 and down carrier 1 year warranty against Manufacturer defects Features and Benefits: Fits GM 10. 5 Inch GM 14 bolt