Toroidal carbon rims are getting so cheap (might be basalt braking surface too) http://www.aliexpress.com/item/1Pair-Newest-700C-50mm-clincher-rim-Road-bike-matt-finish-UD-full-carbon-fibre-bicycle-wheels/32245768695.html
You found any shallower rims the same? 50mm is a bit derp for me
http://www.aliexpress.com/store/product/1Pair-New-700C-38mm-clincher-rim-Road-bike-3K-UD-12K-full-carbon-fibre-bicycle-wheels/1430139_2055611626.html
@Tenderloin started
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Toroidal carbon rims are getting so cheap (might be basalt braking surface too) http://www.aliexpress.com/item/1Pair-Newest-700C-50mm-clincher-rim-Road-bike-matt-finish-UD-full-carbon-fibre-bicycle-wheels/32245768695.html