Wheelset bike wheel system uses racing bike training size 28 inches material aluminium size etrto 700c series fulcrum racing fulcrum 2 way fit tyres clincher tubeless tubular brake mount rim brake spoke type bladed spokes hubs 16 21 spoke material stainless steel lacings radial front radial rear two cross front rim joint welded type of bearing precision ball technology fulcrum 21 two to one