- Sturmy Archrer Vs Alfine
It was the 3 speed fixed hub that got me looking at their website. That is when I discovered their 5 spd with a 120 OLD. What appeals to me about the 5 spd is that the direct drive gear is in the middle of the 5 on offer. That is, the ratios that may suffer from the mechanical drag of the planetary gears are either side of what I am used to peddling as a single speed and what I'd choose in most situations.
What I am wondering is, do the SA hubs have more drag than the alfine/nexus?Posted 9 years agoepicycloSubscriber
I use a 3 speed S-A for road riding.
It is smooth, silent, light, nicely made, and reliable. It has over 100 years of development.
I also own a few other hubs:
Nexus/Alfine 8 speed
Assorted others, eg Duomatic, S-A 7 speed, S-A 4 speed, the new S-A S3X hub (yet to be fitted), etc.
The Shimano hub is very nice but I prefer the lighter rear wheel you get from the S-A 3speed (the 5 speed is the same weight according to the website), and the only reason I'd use the Shimano is if I desperately needed the wider range – perhaps towing a trailer.
The S-A 8 speed should be avoided unless you are running it on a small wheel commuter, or will spend a lot of thime in low gear because bottom gear is the direct.
The nice thing about the S_A is that the middle gear is direct, thus no drag. Set that as your usual cruising ratio and the other ratios fall nicely into suitable reductions or stepups.Posted 9 years agojackthedogMember
With the three speed, how big are the jumps between the gears?
I love the idea of a direct drive, with an under and overdrive either side – that's pretty much perfect for my uses, but it depends on the ratios. If it's only the equivalent of a couple of cassette-sprockets difference either way then it might not be worth it.
I'd like a middle SS gear, a spinny gear for long/steep climbs, and a big gear for fast flat and downhills (I know, moon on stick alert).
Any ideas?Posted 9 years agoepicycloSubscriber
The ratios are Low .75; Direct 1.0; High 1.33
On my S-A 3 speed road bike I have set the gearing in Direct to 65" which is a pretty useful ratio for allround single speed road use. This means the Low is 48" which is the gearing I use on my single speed mtb, so it's good enough to get me up any hill, and the High is 86" which is approximately the gearing I use on my single speed road bike.
In other words a perfect set of ratios, one for uphill, one for cruising, and one for going faster.
For contrast the standard Bowery gearing is 48/17 to get about 75". Keeping that ratio as direct would give 56", 75", and 99" with a S-A 3 speedPosted 9 years ago
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