Having recently shopped around Sheffield for new, low budget tyres, I would like to recommend Hi Q on Leppings Lane (next to Law Brothers Petrol Station.)

At £25 for a new 155 X 13 tyre, including valve, balancing and VAT, I got great value and a great service.

They also do MOT & servicing so I'll try them when its due next time.

NB - I have no connections with them whatsoever. I am just a happy customer.