You can find all the spare parts and components you need for your bike at Escapa
Like the Gurpil ZAC V-Brake 6-7V 26" Threaded Rear Wheel for MTB
26" rear wheel for MTB:
-Black double-wall rim for V-brakes with 36T. PROFILE: 19 mm INSIDE, 24.6 mm OUTSIDE, AND 21.4 mm HEIGHT. ETRTO: 559
-36 black spokes
-Black Gurpil rear Rapido quick-release hub for 6-7V thread