I have this 34 alloy sprocket- very light- on my 66 build
It works well here in flat Florida- and I can easily cruise 25 to 30 with little effort or strain on the motor- I've gotten it up to 35- and that's on an analog speedo that may be reading a bit low since I have 27 x 1 1/4 alloy wheels and not 26".
I've had a 32 in the drawyer for some time- I didn't put that one on originally because I was still riding some in hilly Indiana and hadn't then arrived at 27" on both wheels of the Micargi Panther cruiser frame- and the 32 is steel and heavy-
this 34 alloy sproke has all sizes of drillings and I have one directly bolted to a flat sided flip/flop hub I drilled for the small circle of six holes- the "Disk Brake" pattern-
which would also bolt directly to this spin on freewheel hub:
Haven't put it on yet while I get more life out of the fussy 27 rear.
But I started 4 years ago with the kit 44, then got a steel 36, and finally this 34- smooth as silk-
the 50 build has an alloy 39