Alfine Hub?

BigJimmyB

Wondered what you guys thought about....

Putting an Alfine 11 speed on an MTB (say my 09 Stumpy)?

Could it be paired wih a 2 or 3 sprocket front end or is 11x1 enough?

Sorry, my tech-capabilities are non-existent so any advice very welcome.

I know that weight COULD be an issue, but without a cassette/rear mech etc I wonder if it could be (to me) 'negligible'?

Thx in advance
BJB

nicklouse

if you wanted 2 or 3 rings on the front you would need a big range tensioner or a rear mech.

which make the idea pointless.

yes you will have the range you need but you will have to work out what size ring and sprocket you need.

BigJimmyB

Thanks Nick - any recommendations on front-end single sprocket set-ups?

How many teeth do you think would be appropriate for general trail and XC?

Ta
BJB

oodboo

I've been toying with the idea of a alfine/hammerschmit setup on a suitable hardtail like the on-one 456 ti. Probably never happen but I think it would be interesting. 22 gears and no chain movement.

nicklouse

oodboo wrote:

I've been toying with the idea of a alfine/hammerschmit setup on a suitable hardtail like the on-one 456 ti. Probably never happen but I think it would be interesting. 22 gears and no chain movement.

the problem with that will be the drive cog sizes. they dont go big enough.

nicklouse

BigJimmyB wrote:

Thanks Nick - any recommendations on front-end single sprocket set-ups?

How many teeth do you think would be appropriate for general trail and XC?

Ta
BJB

there are a few ready builds out there. Genesis and Charge I think have some have a look at what they spec.

gilesjuk

oodboo wrote:

I've been toying with the idea of a alfine/hammerschmit setup on a suitable hardtail like the on-one 456 ti. Probably never happen but I think it would be interesting. 22 gears and no chain movement.

You risk destroying the hub if you torque it too much:

http://forums.mtbr.com/showthread.php?t=696480

nicklouse

gilesjuk wrote:

oodboo wrote:

I've been toying with the idea of a alfine/hammerschmit setup on a suitable hardtail like the on-one 456 ti. Probably never happen but I think it would be interesting. 22 gears and no chain movement.

You risk destroying the hub if you torque it too much:

http://forums.mtbr.com/showthread.php?t=696480

and if you read a bit further

ME
Hi, I have never heard a definitive answer to this question I have been asking for a while. Does the Alfine hub require a minimum chainring size to avoid too much torque ont he hub?
If so what is it? If I was to buy the new Alfine 11, and run a 26 tooth ring with say the standard 22 tooth sprocket, would this be fine?
Cheers.

SHIMANO
Thanks for contacting Shimano.

You can run any size chain ring with an internally geared hub, you will only be changing the overall gearing range.

The Alfine 11 speed hub can be used in conjunction with our CT-S500 chain tensioner, which allows the use of two chainrings.

I hope this is helpful, feel free to contact us again.

ME
Thanks, that answers my question exactly. I only ask because I currently run a Rohloff, which has very strict limitations on input torque which will void warrantee if exceeded. Could you please tell me what the warrantee on the Alfine is? Cheers.


SHIMANO
All Shimano bicycle components carry a minimum of two years warranty regarding the quality of workmanship and materials.

Further information pertaining to the use of Alfine hubs-: To make the most of the gearing available it is recommended to set the gearing ratio at 1.9:1, e.g., 34:18, 39:20 or 45:23.

The gearing range can be broadened by the addition of the CT-S500 chain tensioner and a second smaller chain ring of up to a 16 tooth difference, e.g., 44-28 - giving an effective gearing range of up to 642%.

I hope this is helpful, feel free to contact us again.

so you can fit what you want.

BigJimmyB

Thanks NIck.

I've been thinking, would this work on a full sus or would there be chain issues?

Thanks again

BJB

nicklouse

BigJimmyB wrote:

Thanks NIck.

I've been thinking, would this work on a full sus or would there be chain issues?

Thanks again

BJB

you would need a suitable tensioner to take up any change in the chain length (chain Grow) unless it is a BB mounted swing arm (Like a Kona A).

BigJimmyB

Mmm, thought so.

Would something like this do the job?

http://www.google.co.uk/imgres?imgurl=h ... vns&itbs=1

Sorry for massive link!

nicklouse

you should have read the page.

These BB-mounted tensioners are designed for hardtail bike frames with ISO/English (MTB) bottom brackets. They will not absorb the chain-pull commonly found on full suspension frames. Please look our ETR/V with full suspension kit if installing on a full suspension (or trials) frame.

BigJimmyB

Sorry NIck, yes I did mean the ETR/V.

Would something like this work?

nicklouse

they say yes so i would say yes.

BigJimmyB

Thanks buddy