> David Bean asks "...On 5 speed Suntour freewheels, are the two smallest cogs
> the only ones that are threaded? And the other [splined] ones can be
> flipped over in order to wear out the other side of the teeth?..."
>
> Yes. No. If I have it right, the freewheel cog teeth have a profile and are
> not symmetrical. The straight side of the cog teeth faces outward towards
> the rear derailleur, to facilitate chain pickup when shifting onto larger
> cogs. If you turn them around, they will work but your upward shifting
> may/will suffer.
I could be wrong as I've never disassembled a Suntour freewheel, but...
In my experience the larger 2 or 3 cogs on Suntour 5 speed freewheels have no profile...they're flat on either side. I can't see any reason why you wouldn't be able to use them flipped them over.
Whether you'll get more life out of them is debatable.
Greg Weiner
San Francisco, California, USA