Replacement tyres for BAS 350

Hi All



My Carbatec BAS 350 tyres have perished and I am looking to replace them before they disintegrate. I can get Carbatec ones but they are still the same material and will therefore deteriorate as well - and aint cheap either. I gather there are other types of tyre, urethane for example. There must be a few BAS 350s about with similar problems. Could someone please let me know if there is a better option than the rubber tyres available?



Thanks in anticipation



RichardL