Originally introduced in early 1968 as the
Roadmaster K81 rear tyre by
Dunlop Rubber Co. Ltd, the tyre was renamed "TT100" because it was the first production tyre to reach a lap speed of 100 mph over the
Isle of Man TT race course when
Malcolm Uphill rode his
works Thruxton Bonneville to victory in 1969 with a fastest lap of 100.37 mph during the 750 cc class production race. The feat was repeated in 1971 when
Ray Pickrell averaged 100.01 mph on one of the three Works Production racers, a
Triumph Trident nicknamed
Slippery Sam. This machine was a modified version of the motorcycle the tyre was originally designed for. The tyres were standard fitment on production models of
BSA and
Triumph triple motorcycles. Originally called in some countries the "Dunlop Roadmaster K81 Trigonic Tyre" and developed from Dunlop's racing background, TT100s were first made in England, and then later reintroduced from Japan,. and an identical tread pattern to front and rear instead of the usual circumferentially ribbed front tyre of the day. it continues to be made utilising the latest technologies and materials for improved performance. ==External links==