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If you run an Alfine 8 speed hub with a 32 front ring, what sort of ratio spread do you get?
just slightly larger than a 8speed front 32t cassette 12-32t
The 8 speed Alfine is roughly equivelent to a 12/27 cassette I think.
Sheldon Brown has a gear calculator for IHGs - you can work out inches of gear for a given chainring and cassette and then make a direct comparison for the Alfine.
Personally I use a 34 ring and it does everything I want it to.
Not exactly enough for a road based commute on slicks then?
I don't think you would find it that bad - maybe a bit of spinning if the road points down.
Depending on set up there may not be enough clearance from the chainstay for a bigger ring on on the inner mount. Move onto the outer mount and the chainline goes out. I believe if you use a Nexus sprocket you have the option of flipping the sprocket to achieve a better chainline. 34t works fine for me on an offroad/onroad undulating commute.
I have found 34 is ok for a commute
It is wider than a 12-27. Ratios are 1.615 to 0.527 so with an 18T sprocket it is approx 11-34.
I use on on my commuter. okay, it's 700c with Marathon XR (touring semi-slick) tyres. Grind up a hill at as low as 8 mph, spin out somewhere between 35 and 40 mph. That enough for you? 🙂
Grind up a hill at as low as 8 mph, spin out somewhere between 35 and 40 mph
Yours must be much higher geared than mine - it's range is more like 7 to 25mph (45 front, 20 rear).
Yours must be much higher geared than mine - it's range is more like 7 to 25mph (45 front, 20 rear).
Something like 45 front, 18 back. When I say grind, I mean standing up and grinding. I've managed 41 mph and was [i]almost[/i] pedalling 😀
just swapped a 32 for a 36 up front, see how it goes tomorrow.... had to flip the chainring to the outer ring on the crankbut the chainline still runs ok.