Cheetahmk7 wrote:Both really. You can't radially lace a disc brake hub for instance and that means a different hub design.
You can radially lace the non-disc side if you want.
But all of these arguments are silly. The lacing pattern doesn't appreciably affect aerodynamics, the number of spokes does.
If a six watt difference is significantly significant to your riding, it doesn't matter what wheels you use. You need to get for before you worry about such things.