I followed the link last year and bought a set for £10 each including fitting and balancing.
Not been able to find that price since and the offer has expired...
http://www.mytyres.co.uk/start.html - search for 135/12 and the name trayal appears. Never heard of them myself but i founs some very favourable reviews and at £13.80 delivered, you cant complain.
You will have to have them fitted, but if you have a friend of a friend, this can be done quite cheap.
Michael
