The XRAY 362371 Composite Angled Hub lets you precisely set the front gearbox differential height on an XB4'21. It provides a 2mm differential height change and three angle options so you can match drive shaft geometry to both low carpet ride heights and higher dirt setups. Use the upper position on smoother, low-ride carpet to keep shafts aligned, and switch to the lower position on rougher, higher ride setups to keep the drive shafts straight. These simple adjustments help racers achieve cleaner handling without major chassis changes.
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