Hard to know for sure but what is certain is that these comfortable shoes are light (just 275g for a size 43 shoe) and, thanks to the Boa closure system, easy to adjust and very well vented.
You can trust Cycling Weekly.
While Jens Voigt may be well known for telling his legs to shut up, it's unlikely you'll ever hear him shouting such madness at his feet, thanks to Gaerne's range-topping G.Chrono shoes.
Gaerne say that by making the super-stiff carbon-fibre sole very thin, the rider's foot is closer to the pedal and thus more efficient.
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