>>1633206supposedly a 3/32" chain wears faster when you mash in a heavy gear but you can cope by using a higher tier chain. i've read of IGH tourers using KMC X8 chains for many thousands of km. now there are KMC e1 (3/32") and e101 (1/8") rated for at least 3500 km and 10000 km respectively when used on ebikes with appropriate sprockets.
the sram s300 crankset (3/32") is generally considered to be plenty stiff enough for street use and it's also very noticeably stiffer than entry level square taper cranksets. narrower chainrings may be more prone to flexing but a stiff frame should counter that.
people say 1/8" 144BCD track chainrings are easier to find, but the stock chainring should last a long time and you can nonetheless find 3/32" 130BCD chainrings. for example you can search 130mm on bike24 and the surly stainless steel chainring among others will come up.
>crankset weightsram omniums are actually lighter, but more expensive. one guy said 704g without the bottom bracket for 165mm omniums. the claimed weight for omniums is 825g. sram s300 weighs ~830-848-865g in 165-170-175mm crank length WITH the bottom bracket.
>chain weightKMC e1 EPT 296g at 110 links (a fixie might use 92-96 links or so)
KMC e101 EPT 375g at 112 links
>cog weightphil wood stainless in 17T is 56g in 3/32 vs 68g in 1/8". there are lighter cogs in aluminium or chromoly steel from other brands.