Rear wheel- there is a few thing's you could do about the back wheel you could go freehub profile? or buy a deng wheel for about £110 brand new from tarty.But you can get a cheapy monty full wheel from tarty for £45. Stem -£16-35 cheapy monty stem £16 or there load's of other stem's. Grips- £5 halford foam's if you like them. Some rimtape- just use normal tape so £1 or if you have some spare free Rear brake -buy off the forum or £65 from trials-uk Or just buy the python lol tom....