I would upgrade your current TCR with Ultegra 8000 groupset ($700) and some lightweight aluminum clinchers like the DT Swiss PR1400 Dicut Oxic 21 clinchers (1450 grams) at $720 a pair. The current Ultegra blows aways older Dura Ace.
https://www.merlincycles.com/shimano...et-102895.html
https://www.merlincycles.com/en-us/d...ls-101032.html