The 1998 Isle of Man TT was the 92nd edition of the event. Due to the high amount of rainy days, the Sidecar Race A was cancelled. It was only the second time a race was cancelled in the history of the event. The TT Formula One was also postponed by a day.[1]

Ian Simpson was the only rider to win multiple races, taking the opening and closing races, the Formula One TT and the Senior TT. It was Simpson's last participation at the TT as leg injuries prevented him from competing in 1999, before forcing him into early retirement in early 2001.[2]
Three competitors died during the event, Mike Casey, Ian Hardisty and John Henderson.[3][4][5] A fourth rider, 66-year old Jack Trustham, died of a heart attack during a parade lap commemorating Honda's achievements on the island.[6]
Results
editFormula One TT
edit| Rank | Rider | Machine | Time | Speed (mph) |
|---|---|---|---|---|
| 1 | Honda | 1.16.15.6 | 118.74 | |
| 2 | Honda | 1.16.17.8 | 118.68 | |
| 3 | Honda | 1.16.36.5 | 118.2 | |
| 4 | Kawasaki | 1.16.51.3 | 117.82 | |
| 5 | Honda | 1.17.43.5 | 116.5 | |
| 6 | Chrysalis AMDM | 1.20.14.1 | 112.85 |
Lightweight TT
edit| Rank | Rider | Machine | Time | Speed (mph) |
|---|---|---|---|---|
| 1 | Honda | 46.51.8 | 96.61 | |
| 2 | Yamaha | 47.34.7 | 95.16 | |
| 3 | Yamaha | 47.48.6 | 94.69 | |
| 4 | Honda | 48.08.0 | 94.06 | |
| 5 | Honda | 48.32.4 | 93.27 | |
| 6 | Yamaha | 48.40.6 | 93.01 |
Sidecar Race B
edit| Rank | Rider | Passenger | Machine | Time | Speed (mph) |
|---|---|---|---|---|---|
| 1 | Doug Jewell | Bullock DMR Honda | 1.03.45.1 | 106.52 | |
| 2 | Nick Crowe | Ireson Yamaha | 1.05.04.4 | 104.36 | |
| 3 | Kevin Leigh | Shellbourne Honda | 1.05.12.3 | 104.15 | |
| 4 | Phillip Biggs | Rose/Molyneux Yamaha | 1.05.13.8 | 104.11 | |
| 5 | Ian Watson | DMR Yamaha | 1.05.15.7 | 104.06 | |
| 6 | Ian Simons | Windle Honda | 1.06.24.1 | 102.27 |
Ultra Lightweight TT
edit| Rank | Rider | Machine | Time | Speed (mph) |
|---|---|---|---|---|
| 1 | Honda | 1.03.50.3 | 106.38 | |
| 2 | Honda | 1.04.08.2 | 105.88 | |
| 3 | Honda | 1.04.30.1 | 105.29 | |
| 4 | Gary Long | Honda | 1.04.38.0 | 105.07 |
| 5 | Honda | 1.05.08.6 | 104.25 | |
| 6 | Garry Bennett | Honda | 1.05.18.6 | 103.98 |
Singles TT
edit| Rank | Rider | Machine | Time | Speed (mph) |
|---|---|---|---|---|
| 1 | Chrysalis BMW | 1.03.11.2 | 107.48 | |
| 2 | Sanyo Honda | 1.03.30.4 | 106.93 | |
| 3 | Mick Jeffreys | Spondon Rotax | 1.08.09.2 | 99.64 |
| 4 | Kawasaki | 1.08.22.8 | 99.31 | |
| 5 | Terry McGinty | Harris Suzuki | 1.10.43.5 | 96.02 |
| 6 | Keith Dixon | Seeley G50 Special | 1.10.56.0 | 95.74 |
Junior TT
edit| Rank | Rider | Machine | Time | Speed (mph) |
|---|---|---|---|---|
| 1 | Honda | 59.22.7 | 114.37 | |
| 2 | Honda | 59.29.4 | 114.16 | |
| 3 | Paul Dedman | Honda | 1.00.07.3 | 112.96 |
| 4 | Honda | 1.00.08.2 | 112.93 | |
| 5 | Chris Heath | Honda | 1.00.24.5 | 112.43 |
| 6 | Honda | 1.00.26.8 | 112.35 |
Production TT
edit| Rank | Rider | Machine | Time | Speed (mph) |
|---|---|---|---|---|
| 1 | Honda | 56.58.7 | 119.15 | |
| 2 | Kawasaki | 57.27.7 | 118.19 | |
| 3 | Honda | 57.29.0 | 118.14 | |
| 4 | Yamaha | 57.45.5 | 117.58 | |
| 5 | Yamaha | 58.14.5 | 116.6 | |
| 6 | Yamaha | 58.17.5 | 116.5 |
Senior TT
edit| Rank | Rider | Machine | Time | Speed (mph) |
|---|---|---|---|---|
| 1 | Honda | 1.53.23.1 | 119.79 | |
| 2 | Kawasaki | 1.53.26.8 | 119.72 | |
| 3 | Honda | 1.53.57.3 | 119.19 | |
| 4 | Yamaha | 1.55.09.0 | 117.95 | |
| 5 | Honda | 1.55.35.2 | 117.51 | |
| 6 | Yamaha | 1.56.14.2 | 116.85 |
Notes
edit- ↑ "TT 1998".
- ↑ "TT Website Interviews - Ian Simpson". www.ttwebsite.com. Retrieved 2023-12-22.
- ↑ "Motorsport Memorial -". www.motorsportmemorial.org. Retrieved 2023-12-22.
- ↑ "Motorsport Memorial -". www.motorsportmemorial.org. Retrieved 2023-12-22.
- ↑ "Motorsport Memorial -". www.motorsportmemorial.org. Retrieved 2023-12-22.
- ↑ "Motorsport Memorial -". www.motorsportmemorial.org. Retrieved 2023-12-22.