Eccentric, oval, Rotor, whatever you want to call them, elliptical chainrings are nothing new in cycling and XC, but elliptical chainrings on a mountain bike for aggressive riding? That’s exactly what Leonardi Factory Racing seems to be thinking with their Corona Single Oval Track chainrings. Available in either a 34 or 36 tooth configuration, the chain rings have two mounting positions the affect how each ring performs.
Now, as these are single rings and we’re talking mountain bikes and not XX1 (though that technology would be a good use for this), the chain would simply go slack and fall off while bouncing through the forest. In order to use these bad boys on your MTB, you’re going to need a specially designed chain guide.
See it, after the break.
This is Leonardi’s own chainguide that will work with their Track oval chain rings. Apparently, the guide was designed specifically for use with the Corona single oval Track chain rings, and according to I-MTB, works quite well. The guide bolts on to frames with an ISCG OLD 05 standard, and is compatible their 34 and 36 tooth Track oval chainrings or standard 32-38t single rings. Built with Delrin guides, a silver anodized aluminum frame and a Polyzene taco, the guide comes in at 175g.
What do you think? If you’re a fan of oval rings on the road, would you try it on the MTB?