This one appeared ages ago, produced by a company that's better known for its flight sims (check out the last issue if you must). And, to tell the truth, it looks a lot more like a flight sim than a driving game. You're on a motorbike, racing against lots of other motorbikes, but rather than the usual view from behind the bike you get an over-the-handlebars job. This meas that when you lean over round a corner the handlebars stay horizontal while the horizon tilts over, and when you pull a wheelie the horizon wobbles up and down. It's a bit hard to explain, but think of flight sims and you should get the general drift. This gives it a very realistic feel, which is helped by having lots of gears and dials to worry about. There are loads of other complexities, like an ability to connect lots of Spectrums together and get them to race against each other, not to mention hundreds of options to adjust various things.
Being a bit on the realistic side, TT Racer isn't the easiest of games to get to grips with though. You'll start off wobbling about all over the place, and may well end up doing it too. But if you do get the hang of it this is a top-notch bike game that makes up for in simulationiness what it lacks in playability.
Perhaps not the world's best representation of a motorbikie control panel, but it'll do.