4 different Portage Yokes offered for the many Mad River models. newitem313115995$22.0036.5 inch Portage Yoke: 36.5 inch Portage Yoke40 inch Portage Yoke(+3.00)Extreme Duty Portage Yoke(+4.00)39 inch Contour Portage Yoke(+31.00)