The Gecko Electric Rear compound has better chunk resistance than the Gecko Electric Front compound, if that is an issue with drivers. You can use Rears all round just e.g. go harder on the front by 2 to 5 Shore points depending on how much steering you like.
Adams Racing Limited (who make the Gecko foam rubber tyres) are currently developing a new range of 1/10th 'Gecko Electric' tyres where you can use them front or rear. These will have even more grip and high overall chunk and wear resistance. They should be available by middle July.
Anyone can currently purchase 1/10th Gecko Electric & 1/10th Gecko Nitro tyres at Microtech Racing Limited who have a '6 for the price of 5' deal i.e. £5.53/pair if you buy 6 pairs ($10.7 USD/pair including any tax charged). see www.geckotyres.com
for more details
Adams Racing Limited should also have a range of 1/12th carpet tyres available by early September. As with the the 1/10th Gecko Electric tyres, early tests show extremely high (& unbeatable so far) levels of grip and good wear & chiunk resustance.
Adams Racing are curruently in negotiations with major american distributors and a recommended distributor should be nominated by the end of August.