Thanks for the advice guys.
Seller insists they are Gnarly's, Gnarly spec will not really suit MX riding I do.
Will look at Fattys, and the T5's.
I am virtully the only 2 st on the grid at the meetings I do. Can whip the 4st out of the gate, and corners but am loosing out 2nd half of straights. so need to change pipes as one of the quickest upgrades.
Not much Dune riding in the UK, only the once yearly Weston Beach Race. 500 quads, mass start and man made dunes/jumps.
Cheers