The final design of the S3 prototype had a large tubular steel twin-spine frame, designed by James Colbrook. Andy Earnshaw was responsible for designing the gearbox and shaft drive to a 240/50ZR16 bike specific rear tyre. High specification front brakes were Daytona 955i twin four-piston callipers with 320 mm floating discs and the rear brake, developed specifically for the purpose, was a single twin piston calliper and 316 mm disc. Ride handling is controlled by purpose built rear shocks and a Triumph first, 43 mm 'inverted' front forks.