Just sharing my experience of building a lightweight bike with some cool lightweight parts and some modding.
Hope some of the things I’ll be doing are unique enough to be of interest.
The goal is to build a lightweight, everyday fun bike for my local rides in the SF bay area. That means a bit of everything from climbing, technical descents and a little bit of gravel, hopefully with long ride comfort. The Aethos is the perfect platform for such a build. Arguably the lightest available frame with solid ride characteristics and room for wider tires. I’ll modify parts as needed for shedding weight on non critical parts. I’ll be running a 1x11 drivetrain. Projected weight is 5 kg or thereabouts.
Some typical, some not typical plans.
The usual lightweight components: Clavicula SE, DA R9170 levers, Extralite hubs, Darimo carbon parts, Tubolito tubes. Also plan to mod the Di2 battery (credit to Klaster) and cables, lighten some parts, build a wheelset with Berd spokes etc.
Rough Build List
56 S-Works Aethos satin carbon/black chrome
Frame with hangers removed 645g (a bit heavy for a 56?)
Fork uncut 303g
Dura Ace Di2 9170 levers
Dura Ace Di2 9150 rear derailleur
Trickstuff C21 Calipers
Ashima Ai2 rotors 160mm/140mm
Bontrager xxx integrated bars (may upgrade to Darimo combo)
Clavicula SE crankset
Fibrelyte 40t chainring
Xpedo Thrust SL Ti pedals
3T Bailout Cassette 9-32
Selle Italia C59 saddle
Darimo T1 seatpost
Stan’s Grail CB7 rims (impressively light clinchers, claimed 300g)
Extralite SPD Hubs
Berd Polylight spokes
More details soon.
SPOILER ALERT: Updated build list as of March 2021
Code: Select all
s-woks aethos 56 black/chrome 646
s-works aethos fork cut 266
headset 38.4
3d printed sleeve, spacer 6.4
top cap, alloy screw 4.4
Bontrager xxx integrated bars 225
Dura Ace st-r9170 levers 344
derailleur hanger DM 14
9150 rd direct mount 185
modded Di2 battery, cables 56
3T Bailout 9-32 220
custom bung-glued in 5.7
Lizard skins DSP 2.5 bar tape 50
Selle Italia C59 61
Darimo T1 73
seatpost collar specialized 11
bottle cages and bolts 20
Trickstuff C21 F pads/bolts 108.6
Trickstuff C21 R pads/bolts 99.4
brake hoses, banjo, ends 45.7
brake hose foam pads 6
Ashima Ai2 rotors F/R 160
Stans Grail CB7 rims 572
Extralite Cyber SPD3 hubs 206
Berd Polylight/nipples/rings 150.3
rim tape 13.1
Rene Herse 28c tires 461
tubolito s tubo 44
thru axles specialized 52
Xpedo Thrust SL pedals 163
Clavicula SE compact 170 293.4
chainring bolts 10
Fibrelite 40t chainring 33
THM BSA BB, spacers 82.1
kmc x11sl chain 220
total grams 4945.5