theres loads of differnt styles, i have good year g90 on my series 2 ffr there good on the road and light mud but never tried them in mud mud as i would never do that in my sereis
I ran Michelin XCL 7.50x16 which were the military tyre for years before the G90 and XZL replaced them. I now run Michelin XL in 9.00x16 size.
They're pretty much bulletproof, I haven't had 1 puncture or tyre coming of the rim since I've had them, unlike some of the other guys who I go laning with.
I got them from Vass in Ampthill http://www.vass.co.uk/treads.pdf
my mate bought 5 XZL 750's about 5 years ago for his series. they were es mil from the gulf and a coiple had a few stones wedged in them still. He paid £30 each for them as they had loads of tread left on them, really good sidewalls too.
Downside is he was so impressed with them, more the quality to be honest, he went to replace them new and was qouted £150 each!