hmmmm never thought about selling the wheels. I was considering just keeping the aksiums and putting them on the aluminum bike for training/rain days.
Is SRAM Red really that necessary though? I mean, you got your bike down to 16 without even touching the rival drivetrain right?
Theoretically I could follow your blueprint, and just have to make up the difference between the 54cm and 56cm frame, and the difference in our wheels and I should be able to get there. Most weights don't include pedals or cages anyhow, so I could take off another ~300g just from that
So I'm thinking, when the bike is purchased, I need to get:
3. light tires on the ksyriums
4. cut/replace seatpost depending on how much more I need.
Is there any free weight dangling on a xtra tall steering tube I could cut?
You could however you want to think about the cost. $900 to do so. If you buy the Rival for 2500 you're at about 3400.
The other scenario:
If you buy a 105 bike for 2k (instead of the rival for 2500) you'll save $500.
Sell the 105 groupset for 600
Sell the wheels for 150
Now you've only spent 1250 on the bike. (Or hell if you just buy the frame for cheaper...but let's not talk about that)
Spend 1800 on SRAM Red and you're at $3000
Toss your wheels on.
Now you still have $400 in your pocket for things like skewers, saddle, seatpost, etc.
You could follow my blueprint but you'd run out of areas to drop weight.
My wheels are 1350grams so 200 grams lighter than yours. You have to make that up somewhere and that's going to cost you money.
After the saddle, seatpost, seatpost clamp, skewers, handlebars...the only place you can save weight are the components.
I'm not saying it can't be done...but for the amount that you spend you may be better off just buying a better and lighter groupset.
By the way if you do figure out a cheap way of lightening the bike even more I'd like to know. I want mine down to 15.5 without breaking the bank more than I already have.
I'm pretty happy with 16lbs, so I don't know if $900 on top of the bike is really necessary if I'm smart with the saddle, seatpost, skewers. I should probably take a trip to my LBS to see what a stock 56cm rival weighs out of the box, that way I can pinpoint exactly what I need to do after I move the Ksyriums.