Here's a tip: It's not crucial you get replacement cones of the same height as the old ones,shorter ones can be packed out with spacers to match your dropout width!. But what you should check for is the size/curve of the bearing faces : pack your cups with fresh grease then place the appropiate sized bearings in the cups 3/16 x 10 out front , 1/4 x 9 out back and then place a new cone in the middle of the bearings , it should sit snug with no rocking side to side , if it sits to proud, the bearings will run on the cones thin edge and as a consequence wear very rapidly !, what you're aiming for is the bearings to run in the middle of the cones bearing face..