First step to gaining 3lbs on your bike is to get a wild hair up your butt like I did and somehow convince yourself that going from a 3×9 drive train to a 2×10 would be “upgrading.”
Second step is to procure yourself a slightly used SRAM X7 2×10 drive train.
Step three, install said drive train and watch the pounds add up!
Once you do this, you’ll visibly and physically notice the weight difference.
Before the 2×10 drive train swap, Burt Reynolds weighed in at 27lbs. After the swap, you can see he gained a bit over 3lbs…Hmm, not sure if this 2×10 stuff is worth the excess poundage. I can tell you this, that dinner plate sized cassette would be one of the culprits of this weight gain. But I’m willing to give it a try tomorrow and see if the weight will be over shadowed by the benefits of the new drive train. If at any time I don’t like it, I’m taking that stuff off and putting back my 3×9 drive train.