Cycling shoes that are too big may allow 'hot spots,' places where there's too much friction between the sole of the foot and the shoe's insole, which can result in blisters.
On long rides, feet can get very hot. If the shoes don't have adequate venting, sweat can accumulate inside the shoes, and the resulting moisture can cause discomfort and/or blisters.
Shoes that are too tight don't allow for the foot swelling that may occur during a ride, making for an uncomfortable trip.
Lower-quality bike shoes have pronounced interior seams, which can rub up against the foot and may cause discomfort and blisters. Higher-end shoes minimize their seams or do away with them altogether.
Cycling shoes with soft soles don't provide an effective transfer of power from the leg to the pedal, which hampers the cyclist's performance.
Article Written By Billy Brown
Billy Brown is an outdoor sports writer living in Northern California.
An avid rock climber and trail runner, he's been writing about outdoor activities, fitness and gear since 2005. He regularly contributes to "The Record Searchlight," uncooped.com, and Trails.com, as well as other print and online publications. Brown holds a Bachelor of Arts in psychology from Simpson University and is a NASM-certified personal trainer.