Sole Material and Shoe Quality
Soles for cycling shoes are usually divided into three categories. Inexpensive shoes mostly use an injection-molded plastic sole, which is economical but heavier and prone to flexing. Mid-range shoes may use a combination of plastic and carbon fibre, plastic and fibreglass, or an all carbon fibre sole. All manufacturers' high-end competition level shoes manufactured post-2002 use carbon fibre soles. The sole material and amount of tread used in a shoe affects its weight; an expensive pair of road shoes with carbon fibre soles can weigh 650 grams, while a budget-priced pair of mountain bike shoes might weigh 850 to 900 grams.
Some mountain bike shoes have a little engineered flex in the toe area forward of the cleat mount. This assists in walking and in climbing obstacles while carrying the bike. More expensive shoes usually have less frontal flex.
Read more about this topic: Cycling Shoe
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