Hi Madman, I've got knock ons on my 2fifty, they came from mws via ebay, a guy tried to fit them to a Triumph Stag! I used reduced width hubs from Orson Engineering Nr Wolverhampton , they supplied the spinners to. I also reduced the rear track by fitting Z4 rear hubs and machined down 3 series rear discs, that way the wheels tuck under the arches nicely. The wheel is 5 1/2 j x15 I think mws list them to fit AC cobra. Regards Mechman.