Hi Jamus, welcome
It looks like the tyres in your link is for the 10th scale Grasshopper which will not fit the Tamtechs. You can buy 10th scale wheel adapters which will open your choices quite a bit but the big Grasshopper tyres are still too big.
There are quite few people that own and run them in the UK and there is also a dedicated Tamtech section here:
http://www.uk-microrc.co.uk/forum/in...?showforum=273