Take Your obsolete 2020 S-Works at 20.5 kg (700wh)
Remove 50% of the battery cells = Saves almost 2 kg = 18.6 kg
Remove tools from the steerer tube
Go tubeless
Change to 2.3" tires with trail casing = Saves 350 g
Get a Selle X-LR saddle = Saves 110 g
Use Your old 34" factory fork = Saves 216 g
Remove chainstay protector and add some helitape
You will end up with a 17.5ish Levo with 350 wh and still 90 nm torque
Remove 50% of the battery cells = Saves almost 2 kg = 18.6 kg
Remove tools from the steerer tube
Go tubeless
Change to 2.3" tires with trail casing = Saves 350 g
Get a Selle X-LR saddle = Saves 110 g
Use Your old 34" factory fork = Saves 216 g
Remove chainstay protector and add some helitape
You will end up with a 17.5ish Levo with 350 wh and still 90 nm torque