7.5 Degree 2 Lane Banked turn. Supplied with 3 options of turn length. the Inner Radius of this turn is 230mm. The turns are 15 degree, so you will need to print 6 to have a 90 degree turn. The short turn is 73mm on the inside lane and 133mm outside. The medium turn is 95mm on the inside lane and 156mm on the outside. The long turn is 145mm on the inside and 205mm on the outer side of the outer lane.