IMHO. Shoes and helmets should never be purchased online unless you are buying exactly what your are wearing right now. as someone alrready mentioned there is too many difference. just because you wear 39 look #b65 does mot mean you will wear a 39 Look # j87. support you local bike shop.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk