My Seraph/ TanTan TT X 68 Build - Size 54 - Matte Black
6.94kg - $2900ish all in. Weight is plus or minus 50gwith grease, and misc hardware not accounted for.
I acquired most of these parts used over the course of 4-5 months, via ebay and facebook. I learned about most of the build options, not named shimano, from this site or via youtube (GC Performance, Pat Lino, China Cycling, etc...). I also built this bike by myself, first time ever doing a frame-up build, and used GC's SL8 bike build and his other videos.
Frameset - $629 + $100 shipping. Took about 2 months to receive.
Frame w/ headset bearings, bottle cage bolts, fd mount, rd mount - 878g
Uncut Fork - 339g Cut Fork - 309g (10mm spacer)
Uncut Seatpost w/ hardware - 166g Seatpost Wedge - 20g
Thru Axles - 62g
Bar/ Stem 120/38 - 326g
Spacers and Covers - 15g
Garmin Mount - 28g (kinda sucks on first impression, will be looking for alternatives)
BSA30 BB - 88g
Aliexpress SL8 Direct Mount RD Hanger - 15g (saves 8g)
CRW 50/55 Wheelset - 1325g
MT900 160/140 Rotors - 187g (pair)
Aliexpress Tubeless Valves - 11g (pair)
Sunshine Cassette 11-32 - 230g
Vittoria Corsa Pro Control Cream 28 Tubeless - 633g (should be 520g for the pair according to BRR.com)
Amazon CL Rings - 23g (pair)
Stans Sealant 40ml per tire - 60g
Shimano ST-R8170 - 399g
Shimano BR-R8170 - 300g (bolts, pads, calipers)
Shimano FD-R8150 - 112g
Shimano RD-R8150 - 250g
Shimano BT-DN300 - 52g
Di2 Cables - 16g
Sram Force 170, Quarq PM, 53/39 Chainrings - 753g (old sram powerglide chainrings)
KMC X12 Gold - 243g (uncut was 273g)
Brake Hoses - 35g (approximate. I subtracted the excess)
Aliexpress Carbon Bottle Cages - 48g (pair)
Ryet 3d Ultralight 143mm - 165g
Deda Tretaforo Bar Tape - 35g (40g uncut)
R8000 Ultegra Pedals - 248g
Future Weight Weenie Options:
HY Seatpost - 130g - $167 (saves 36g)
Avian Canary - 266g - $300 approximately (saves 60g)
BDOP 11-30 Cassette - 126g - $160 (saves 104g)
Xcadey/ Lexon 53/39 - 600g - $615 (saves 153g)
J&L Axles - 47g - $40(saves 15g)
Tofu Comtura Prima 28 Tires - 480g - $120 (saves 153g over current tires)
Wheels - 1150-1200g - $800 to infinity (plenty of options here)
Saddle - 100-130g - $40 to infinity (plenty of options here)