why not?
why 7?
why 10?
really how can you do a radius, manchester is a verticle conurbation
10 miles west is worsely, salford10 miles north is radcliffe bury 19 miles east is dukinfields tameside
only 10 miles south is Manchester with Didsbury
so 5,, 7, 10 doesn't really matter any milage for any of the named clubs will go past the actual place as most local fanbases do, saying 7miles as it did in no different than 10 tbf, both are beyond the clubs city suburbs itself.
the poll is pointless in the first place