The old first post:
First time (well, almost) poster here, took awhile before I've gathered enough courage to post one of my bikes here. It'a Hongfu FM-079, the build was started in 2014. Back then I didn't have any prior experience with road bikes and wanted something more suitable for pavement than an 26" XC hardtail. During June 2014 - March 2015 I've picked, bought and built everything together. Initially, the budget was about 2500USD+ with the following requirements:
- Road specific carbon fiber disc frame. After some search, I've picked FM79. Not like there were much other options.
- Shimano 11 speed hydraulic groupset. I wanted something modern and didn't might to become an early adopter. Compatibility with tools and MTB parts already owned played a big role too. Hydraulic shifter options were limited at the day to RS-785 and ST-RS685. Since ST-RS505 wasn't out yet and DI2 was out of budget, 785 became an only option with 5800 filling the rest.
- Tubeless compatible clinchers, but not XC-tier shallow. Light-Bicycle laced to Novatec 711/712 proved to be a good choice, albeit on a heavy side.
During 2016, I've progressively swapped most of easy gain parts to their lightweight counterparts.
Build list as of today:
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Component Type Component Weight (Grams) Note Frame Hongfu FM-079 1040 Claimed weight, 56cm Fork Hongfu HF-FK166 415 Steerer cut, with crown race; 22.3mm internal diameter Fork hose clamp Hongfu 3 Two Phillips screws and U-clamp Headset bearings Neco 50 educated guess Headset cap Neco 11 5mm Steerer spacer Hongfu 5 1cm Top cap MT ZOOM 3 Works with sunken expander only Top cap bolt MT ZOOM 2 Bars Hylix Ergonova 186 44cm, uncut Stem Kalloy Uno 7 94 11cm, paint stripped Stem bolts J&L 12 ti, black Expander plug J&L 12 Tuned, new brass bottom with longer shaft (+5g) Bar tape Velo Gel Wrap 64 cut Seatpost (bare) Hongfu 105 Cut off 80mm and 23g; 141 total Seatpost cradle Hongfu 15 Seatpost bolt 3 ti Seatpost bolt 4 ti Seatpost yokes J&L 14 M5, 7075 Seatpost clamp MT ZOOM 10 34.9mm shimmed down to 32.3mm Saddle Saevid Alien 78 Bar end plugs SRAM 4 educated guess Crankarms Zipp Vumaquad 442 172.5; with rings; decals sanded down Chainring big Fibre-Lyte 50 Chainring small Fibre-Lyte 34 Chainring bolts Zipp Bottom bracket Zipp 72 ceramic bearings Front derailleur Shimano FD-9000 65 stock Rear derailleur Shimano RD-9000 161 stock Shifters Shimano ST-RS785 648 Cassette+lockring Shimano CS-5800 277 11-28 Chain Shimano HG600 246 cut down from 266 Pedals Xpedo R-Force Ti 166 Brake calipers Shimano BR-RS685 218 109 per set Brake pads+spring 42 21 per set Brake olives+barbs 14 7 per set Shifting cables 38 uncut Hydraulic hoses Shimano 52 2700mm Rims Light-Bicycle 870 35mm U hookless, 2 total Front hub Novatec D711SB 139 408 Rear hub Novatec D712SB 269 Skewers J&L 30 Bolt on Spokes+nipples Pillar PSR X-TRA1420 280 56 total; 4 spares weight 20g Front tire Schwalbe One Tubeless 370 25mm, used & with sealant stuck Rear tire Schwalbe Pro One 240 25mm, new Tire sealant Stan's NoTubes 50 40ml per wheel Bottle cage TUNE Wasserträger 2.0 9 750ml bottle Bottle cage bolts TUNE Wasserträger 2.0 2 Rim tape Stan's Yellow Tape 12 6 per wheel Valve stems Gredes 20 60mm, 10 per set Front rotor KCNC Razor 61 140mm Rear rotor KCNC Razor 62 140mm Rotor bolts J&L 15 ti Computer sensor Cateye Strada Slim 13 Computer head unit+clamp Cateye Strada Slim 16 Caliper bolts J&L 12 ti Total 7041
Since the winter is at door, the bike's going to serve as wall decoration until April. I plan to drop the weight down to about 6.8kg mark with these:
- Schwalbe Pro One in the front, about 70g less than One Tubeless. Already own it.
- XG-1190, still not sure if 11-26 or 11-28, -100-110g.
- PC Red-22 chain, -10-15g.
- Minor derailleurs tuning. J&L inner cage, carbon pulleys, nylon limit bolts and FD clamp bolt will save about 10g.
- Bar tape, current one is way too porky, but it was the only thing I could source locally fast. I'd be glad to drop 10g here.
- Frameset. 250g+ saving can't be made with open mold products of today. Big brands will cost at least 1500USD. New frame also requires thru axle hubs and flat mount calipers.
- ST-R9120 shifters are 150g lighter, but cost about 1000EUR at the moment. Not an option unless price drops at least twice, which isn't going to happen until used units become readily available in several years. Works only with FD-9100 too, so add a new derailleur cost.
- Wheels. Tons of options here. I'd replace Novatecs with Cyber hubs SPD-2 for ~200g saving, but those are not available in 28 holes. All open mold rims weight about the same and I'm not going shallower. 77 Composites go for 1000EUR apiece, way out of budget. And as a casual rider I'm very hesitant of tubulars. Potentially, there's about 500g to save with top of the line clinchers for 2800EUR.
- Seat/seatpost combo. At least 100g to lose here for a reasonable 400EUR. Still, I will have to be 100% sure about fitting, which I'm not.
- Marginal 10-30g savings everywhere for hundreds of EUR. Worth a shot if it's the cheapest option to reach 6.8kg.
Oh, and I don't race or go for really long rides, but riding experience has been great so far. There were some annoying moments, though:
- FM079 has clearance issue with FD-9000 design. The smaller small chainring becomes, the more evident it is. Making 34 shift acceptably was harder than 36, but then again, I don't do that often. Other people already wrote about this several times.
- Overbuilt fork. The steerer tube has quite small internal diameter, I had to heavily modify J&L UltraStar 2 clone so it would fit in.
- Seat tube diameters are off. I suspect that inner diameter is less than it should have been, since stock seatpost measures 27.0mm and fits just great. Outside diameter is 32.3mm, which limits clamp design. Stock clamp with rotating nut works fine, but is way heavy at 25g. MTZOOM 31.8 collar, on the other hand, didn't allow to screw the bolt in due to messed up angle. I had to use 34.9 collar and a shim.
- Frontmost seatpost yokes had to be cut at angle a bit due to interference with Saevid Alien bottom edge.
- New frame had defects missed by quality control. One of the post mount holes wasn't completely threaded, so I had to ask friend with tools to help. The other issue was with one of bolt holes in seatpost head, I had to sand a drop of resin inside one bolt hole in order to put it in.