I got five cheap new tyers for my combi last year, £10 each. When they wanted £12 each to change them,,,, sod that.. I did them myself it is easy to do, but the wheels still have to be balanced after. Takes about ten minute each tyre the trick is in breaking the seal. to do this I used a spade and a long scafold bar. and there is a bin down our local rubish site for the old tyres to go in . Cheers Pete