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)
Hey y'all, long term review here. I built the bike in January 2025, rode it on the trainer for about a month, and have ridden it outside 3-4 times a week since mid February. I have raced it once. I've got somewhere close to 500 miles on it at this point, maybe more.
Frame: it works, but cant speak to how it compares to other disc brake bikes. I do feel as though it is responsive to putting power down, but maybe not super snappy and that could be several other factors. My previous cervelo r3 rim brake was extremely snappy, but I was also very aggressive when riding that thing. The only "issue" I've had is with the headset cover deal rubbing on the frame itself, instead of floating a .5mm over it. Could be my fault when I built the bike, but going to chalk it up to the part being slightly off. For my first disc brake bike, I have really enjoyed riding it and I'm looking forward to going full weight weenie with it over the next year. I would highly recommend this frame for anyone going the china frame route.
Bars: I went with the 120/38 bars. The bars appear to be exact copies of the specialized bars. They are quite comfortable and have a large aero foil shape to them. I'm not entirely sure where they measure the stem, but this "120" stem has the same length as a 110 stem on another set of bars. I haven't noticed any serious deflection when sprinting, but I'm around 67kg and doing 1200 watt sprints. I don't like the computer mount that's included because it doesn't lock into the handle bar like a traditional 2 bolt under stem mount does. It gets the job done, but I'll be upgrading in the future.
Wheels: The CRW's are fantastic. Aero and lightweight. Seating tires is no issue.
Groupset: its ultegra di2, it works, nothing more to say. the aliexpress cassette works fine, and is only slightly less smooth than a shimano cassette.
