I can't seem to find any info on the weight difference if any between the 3rd gen and 4th gen front wheels. Wondering if anyone here knows. I know I like the look a lot better of the 4th gen front wheel, but then I also like the discs better off the 5th gen as they have a lot less buttons on them. Not sure they would bolt up to the 4th gen wheel and if the offset would be correct. Wish I had the bikes around to experiment on.