Someone told me there's a BMX trak at the bottom of clough street (hanley) - coordinates 53.021258,-2.188621
That's the best i can do on my pc but it may be worth someone checking it out in person; somone who used to be into RC told me people used to bash there years ago, there's definatley something next to that track (whatever that is!) that could be interesting and it looks in decent condition from the satalte shots (and not too far from a pub!).