4 different Portage Yokes offered for the many Mad River models. newitem313115995$25.2536.5 inch Portage Yoke: 36.5 inch Portage Yoke40 inch Portage Yoke(+4.00)Extreme Duty Portage Yoke(+6.00)39 inch Contour Portage Yoke(+33.00)