The 612R is a lighter and more narrower version of the 612. It's ideal for pure road racing where your saddle to bar drop is more than 5cm. It has also been shorted to 252mm Still featuring the proven raised waist to perfect rest your sit bones - not your soft parts! The narrower waist helps tuck in and get low without the inner thigh rub - especially if you have thighs of justice! The new shape and carbon rails bring the weight down to an exceptional 125g Try it for 60days and if you are not happy with the comfort for any reason, we'll give you a full refund. How do I know what size I need? Before purchasing a SQlab saddle you can order a free home fit kit to determine which saddle size you require. It will take into account your sit bone distance (the part where you contact the saddle) and also your style of riding which determines the degree of hip rotation. How does sizing work? Once you have your sit bones accurately measured you'll need to add 0, 1, 2,3 or 4cms to the sit bones measurement depending on your riding position. A more upright positions will add width. The more dynamic the riding position the more hip rotation and hence the narrower the contacting part of your sit bones and hence a narrower saddle will provide the correct fit. This works the same whether you are male or female Width: 120mm, 130mm, 140mm Length: 252mm Weight: 125g (130mm) Rails: Oval Carbon Road Race Unisex Due to the sit bone measurement and the step saddle concept, it is not necessary to differentiate between men and women