Originally Posted by mx_599
but that would be a single speed? i need a few gears

OK...you got me.
38T ring to 11-30 cluster light XC bike.
My theory is that if my bike was +25 lbs I'd drop 2 teeth 36.
Freeride +30 lbs I'd go 34.
Downhill +35 lbs =32T rings.
?