Fit a body shell to a trike, and you have something that protects the rider from the weather and improves the aerodynamics. A velomobile. Sounds great, and I’ve always wanted one (pedal cars for big boys — who wouldn’t want one?). But with my tiddly little commute to work (4.5 km, five lots of traffic lights), the weight and cost penalties of a velomobile outweigh the aerodynamic benefits. As for weather: if it’s raining in the morning, take the bus; if it’s raining in the evening, wear waterproofs. Still, it’s tempting: if I see a secondhand Alleweder sometime…