38mm carbon would be my choice if I'd build the bike with more carbon (Record carbon break levers, carbon cranks and stem), different saddle and an threadless headset and stem instead of quill.
@Ruimteaapje started
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38mm carbon would be my choice if I'd build the bike with more carbon (Record carbon break levers, carbon cranks and stem), different saddle and an threadless headset and stem instead of quill.