was in a local bike shop RPM in Dinnington 01909567125 and was watching the lads fit tyres with mouses to enduro bikes
a very professional looking opperation
If you are intending using your bike off road they had loades of tyres
from road orientated right through to barely legal but still road...
You won't find much between Newcastle and Lanarkshire;-)
But if you're within reach of Edinburgh, try Alvins Moto-Cal (+44 131 552 8666)
who'll fit tyres whilst you wait, provided you book in advance. Open until 8pm Tuesday and Thursday (though you'll still have to arrive by about 6pm)...