KCNC K5 Rectangular Road Rings Type:53T 110bcd Black but they are an extreme

but they are an extreme a-symetric ring

sliding dropouts provide maximum versatility - can be run with a derailleur

The down tube  is still a big stiff 45mm but has been subtly manipulated to increase weld area and improve stiffness

This is a light weight Scandium T-7451 bottom bracket with 3 replaceable sealed bearings

40mm - 384g

KCNC K5 Rectangular Road Rings Type:53T 110bcd Black but they are an extremeThey call them "rectangular" chainrings, but they are an extreme a symetric ring!! They are certainly not round!! Designed to reduce the effect of the "dead spot" as the crank arms come round top dead centre (12 and 6 o'clock). They can increase power, they can increase efficiency, they can make you pedal smoother! KCNC use what they call an ovality ratio of 1. 225 on the K5 pattern rings, with a bi radial symmetry offset by 88. 3 degrees. 110bcd 39T