Jim Rogers wrote:
>
> Chalo wrote:
> >
> > It does offer the promise of a near-dishless rear wheel on 135mm
> > spacing, with durable $12-15 freewheels as a bonus.
>
> Do you still prefer freewheels over freehubs? If so, why?
Reasons to prefer freewheels to cassettes:
- Freewheels are inexpensive and more durable than cassettes (assuming
that a cluster will be replaced as soon as a single sprocket wears
out).
- Freewheels allow easier adjustment of spacing, chainline, and flange
offset than cassette hubs. Narrower freewheels allow even more
latitude.
- Freewheels allow a maximum axle diameter of 19mm (for Shimano
pattern remover spline). Cassettes allow maximum axle diameter of
10mm for Shimano pattern cassette bodies; 12mm for less reliable
sealed bearing bodies.
- When using freewheels, you get a new ratchet and bearings every time
you replace the sprockets. Usually, the pawls are at a larger radius
than those of a cassette, and the bearings are always larger in
diameter with more numerous balls.
There are reasons to prefer cassettes, especially if you want 8 or
more sprockets in back. I have bikes with freewheels, bikes with
gearhubs, bikes with coaster brakes, and at least one with a cassette
at any given time. They all work just fine, and they all have their
strengths and drawbacks.
> I also use freewheels-- I got a bunch of SunTour Ultra-6's for about
> $12 a piece a few years ago. Allows me to build a dishless wheel on my
> 122mm spaced Phil hub (using an offset rim).
That's a great example of a hub that never needed to be made in a
cassette version. That axle is no more prone to failure than the axle
in any cassette hub.
> You used to advocate for freewheels on the basis of them being more
> widely available and the possibility for larger, unthreaded axles.
>
> However, many of those arguments are approaching 10 years old now
> (surely the cassette is the more readily available system now),
In eight and nine speed, yes. Seven speed is a wash, though cassettes
come in more sizes. Six speed freewheels are easy to find, while six
speed cassettes are almost unobtainable. Three, four, and five speed
cassettes are not available at all, though I've seen a couple of
freehub bodies in widths intended for four or five sprockets.
> Is the need for a larger axle to handle your large size the main
> reason; i.e., is that the durability you mention?
Ordinary sized folks bend 8-10mm axles, strip their threads, break
them at the small end of the cone, or spall the bearing surfaces on
small diameter cones all the time. I fix these problems at work
almost every day. Cassette hubs reduce axle bending and breakage to a
tolerable level for most people, but they don't do anything at all
about thread stripping or cone pitting. All the problems I mentioned
can be remedied by using larger diameter axles.
Chalo