I think having a thread of info and direct weight comparisons could be a good resource for those trying to shave a few lbs off their steed. Most would be amazed at just how much all the little things add up and how much it can matter. Relevant info that I think entries should contain is: -Bike model/year. -Part. -Weight (of both old and new part if replacement). -Perhaps info on other relevant factors related to that part. I'll go first: 2000 RC46 Rear Sprockets. -Stock: 1121 grams / 2.47 lbs -Lightened Steel: 769 grams / 1.69 lbs Aluminium (+2 teeth): 352 grams / 0.77 lbs From heaviest to lightest, that is a reduction of 769 grams / 1.7 lbs. All of that is unsprung, rotational mass which has an exponentially larger impact on bike performance than anything else so while the numbers might not look huge in the grand scheme of things, it is actually pretty massive. IMG_20191225_120256_noexif by Norse posted Dec 25, 2019 at 12:33 PM Hope you guys will add more.