>>1677374this, before loosing weight in the drivetrain build something like low profile farsport rims from aliexpress, something like mack or rollcii hubs with titanium screws and sapim cx rays, i bet you could go as low as 1kg wheelset, pair it with light tires and latex tubes
then go with carbon cockpit seatpost and saddle, if your frame is steele than atleast put on a carbon fork, only then you go full autistick with 3/32 drivetrain, achieving the gearing of your choice using the smallest possible chainring/cog possible, both in aluminum and the lightest chain possible, idk what crankset are the lightest do your own research incluing in the factor which bb option is available in that standard and what they weight
keep in mind that its an expensive project that sacrifice durability a lot
