The Isle of Man Tourist Trophy races have a long (hundred-year plus) history thanks in part to the demanding 37 mile high-speed track plus Mountain Course (with a seemingly never-ending series of bends, bumps, jumps, stone walls, manhole covers and telegraph poles) which - needless to say - requires high levels of skill and concentration. Held annually in the last week of May for practice and the first week of June for racing week with many supporting attractions, gatherings and other events taking place.
For many years regarded as the most prestigious and oldest motorcycle race in the world, it has been reported as the most dangerous motorcycle road-race in the world. (From 1949–1976 the Isle of Man Tourist Trophy was part of the FIM Motorcycle Grand Prix World Championship prior to transfer to UK mainland over safety concerns.)
7 Laps (264.11 Miles) Mountain Course.
| Place | Rider | Number | Country | Machine | Speed | Time | Points | |
|---|---|---|---|---|---|---|---|---|
| 1 | John Surtees | Britain | MV Agusta | 93.97 mph | 2:48.38.4 | 8 | ||
| 2 | Dave Chadwick | Britain | Norton | 91.68 mph | 2:52.50.6 | 6 | ||
| 3 | Geoff Tanner | Britain | Norton | 91.54 mph | 2:53.06.4 | 4 | ||
| 4 | Terry Shepherd | Britain | Norton | 91.54 mph | 2:53.06.6 | 3 | ||
| 5 | George Catlin | Britain | Norton | 90.86 mph | 2:54.24.8 | 2 | ||
| 6 | Alistair King | Britain | Norton | 90.83 mph | 2:54.24.4 | 1 |
10 Laps (107.90 miles) Clypse Course.
| Place | Rider | Number | Country | Machine | Speed | Time | Points | |
|---|---|---|---|---|---|---|---|---|
| 1 |  Tarquinio Provini | Italy | MV Agusta | 76.89 mph | 1:24.12.0 | 8 | ||
| 2 | Carlo Ubbiali | Italy | MV Agusta | 76.77 mph | 1:24.20.2 | 6 | ||
| 3 | Mike Hailwood | Britain | NSU | 74.30 mph | 1:27.07.08 | 4 | ||
| 4 |  Bob Brown | Australia | NSU | 73.72 mph | 1:27.48.8 | 3 | ||
| 5 | Dieter Falk | West Germany | Adler | 73.70 mph | 1:27.50.04 | 2 | ||
| 6 | Sammy Miller | Britain | CZ | 72.63 mph | 1:29.08.8 | 1 |
10 Laps (107.90 miles) Clypse Course.
| Place | Rider | Number | Country | Machine | Speed | Time | Points | |
|---|---|---|---|---|---|---|---|---|
| 1 | Carlo Ubbiali | Italy | MV Agusta | 72.86 mph | 1:28.51.2 | 8 | ||
| 2 | Romolo Ferri | Italy | Ducati | 72.68 mph | 1:29.04.0 | 6 | ||
| 3 | Dave Chadwick | Britain | Ducati | 71.56 mph | 1:30.27.8 | 4 | ||
| 4 | Sammy Miller | Britain | Ducati | 70.43 mph | 1:35.55.2 | 3 | ||
| 5 | Ernst Degner | East Germany | MZ | 69.28 mph | 1:33.27.0 | 2 | ||
| 6 | Heinz Rosner | East Germany | MZ | 69.07 mph | 1:33.43.8 | 1 |
10 Laps (107.90 miles) Clypse Course.
| Place | Rider | Number | Country | Machine | Speed | Time | Points | |
|---|---|---|---|---|---|---|---|---|
| 1 | Walter Schneider/H.Strauss | 1 | West Germany | BMW | 73.01 mph | 1:28.40.0 | 8 | |
| 2 |  Florian Camathias/H.Ceeco | 23 | Switzerland | BMW | 72.11 mph | 1:29.47.2 | 6 | |
| 3 | Jackie Beaton/E.Bulgin | 24 | Britain | Norton | 67.63 mph | 1:35.34.8 | 4 | |
| 4 | Alwyn Ritter/E.Blauth | 5 | West Germany | BMW | 67.23 mph | 1:36.17.8 | 3 | |
| 5 | E.Walker/D.G.Roberts | 11 | Britain | Norton | 64.56 mph | 1:30.15.2 | 2 | |
| 6 | P.Woollett/G.H.Loft | 9 | Britain | Norton | 63.06 mph | 1:34.24.2 | 1 |
Friday 18 June 1958 – 7 Laps (274.11 miles) Mountain Course.
| Place | Rider | Number | Country | Machine | Speed | Time | Points | |
|---|---|---|---|---|---|---|---|---|
| 1 | John Surtees | Britain | MV Agusta | 98.63 mph | 2:38.49.8 | 8 | ||
| 2 | Bob Anderson | Britain | Norton | 95.40 mph | 2:46.06.0 | 6 | ||
| 3 | Bob Brown | Australia | Norton | 95.24 mph | 2:46.22.2 | 4 | ||
| 4 | Derek Minter | Britain | Norton | 94.86 mph | 2:47.03.2 | 3 | ||
| 5 | Dave Chadwick | Britain | Norton | 94.74 mph | 2:47.15.4 | 2 | ||
| 6 | John Anderson | Britain | Norton | 94.34 mph | 2:47.58.8 | 1 |