Shimano tiagra 4703 3x10sp braze on front mechsleek balanced and consistent the tiagra 4703 series provides serious entry level riding performance with cascaded technology from dura ace it features an extra wide pivot link to increase rigidity while reducing flex for improved shifting response features light action more ergonomic operation less chain drop new chain guide and fc gear shape with hg x chain braze on support bolt improves stability cassette compatibility10 top gear teeth50t