This is my second pair after putting over 700 miles on the first pair. I had no issues with friction or discomfort at all. Flyknit is by far my favorite shoe material. I've ridden them a lot of streets/sidewalks and they've worn a lot but still held up well. The only reason I'm replacing them forever is because I've had so much success with them that I've ridden them pretty hard. Great shoes!
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