I have 2 engines, both 76mm clutch so 2 different builds. What I’m trying to figure out is if I can use a novatec hub D041SB D042SB for the 21 speed it says they can use a 8,9,10 or 11 speed but I think that means rear gears only. I guess the 21 speed has 7 rear gears. I’m only wanting sealed bearing hubs and I have a dilemma finding a 36h hub. The skewer axles, I don’t know how strong those are either. I only need the rear hub for the 26 in wheel. Basically I need a heavy spoked wheel (12g, 36 spokes) with the hub style of mag wheels but has a mountain bike cassette. I have 2 bikes picked out.