I bought a Trek WSD bike helmet recently and was amazed at how much better it fit than my previous helmets. The size is 49-57 cm instead of typically 51-52 as the smallest size. I have found the lid-equivalent to my ride with 650 wheels.

Seeing over the lip of the helmet is a high priority to me and currently my mushroom-cap aero helmet obstructs my vision. Does anyone know of an aero-helmet manufacturer that makes small-sized (down to 49 cm) options? A decided bonus would be an outer shell that doesn't appear big enough for me to live inside.

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