A custom-built wheelset of the highest order for heavy-duty EMTB use! Classic MFU Boost ISO hubs, 32 H both front & rear, anodized red shells, black endcaps. Sram XD(R) chromoly freewheel driver body. DT Swiss FR 541 29″/32 H rims. Sapim Race spokes, Polyax Double Square Secure-Lock nipples. Hand-built to even tension and thoroughly stress-relieved.