BEST MOUNTAIN BIKE REVIEWS

Where is the cheapest place in Edinburgh to buy mountain bike tyers (size 26 x 2.00) and can I put wider tyers on the the original wheels?
ie 2.75 rather than 2.00

Thanks in advance
Hey guys The Edinburgh Bicycle shop was superb, i got two new tyers (specialized "flack jacket) for £10 a piece, I was advised to stick with the original size of tyre as I would mainly be riding on road.

The bike is a "Huffy", it was given to me by a friend, so I dont know much about the bike, it seems to be an american bike but I noticed the wheels were made in germany. I think there is a slight buckel in the rear wheel I was thinking of taking it to "Grate kes, No Bull" in Leith walk to hae it repaird or get a second hand wheel.

My brother is stationed in Germany and I want to buy him a mountain bike to replace the stolen one he had here in the states. What I need to know is: how do I find bikes for sale, how do I purchase it, how does he get it, and any recommendations? Thank you very much for any and all help.