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PostPosted: Mon Jan 23, 2012 3:09 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader

Joined: Mon Oct 15, 2007 9:05 pm
Posts: 9245
Hi all,

So is anyone running Alfine hub gears on here? Any problems? Do you notice the extra weight in the back end? How are you finding the spread of ratios?

Cheers
Si


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PostPosted: Mon Jan 23, 2012 3:37 pm 
East Midlands AEC
East Midlands AEC
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Joined: Thu Oct 05, 2006 7:45 pm
Posts: 15067
Location: Derby, UK
[pulls up chair, for future reference]


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PostPosted: Mon Jan 23, 2012 6:18 pm 
retrobike rider
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Joined: Wed Dec 09, 2009 5:36 pm
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Location: North Yorkshire
There was a fairly comprehensive thread on SnootyTrailcentreWarrior a while back:

http://singletrackworld.com/forum/topic ... all-thread

The gist of it was that the C of G only moves back about 30mm but you can still sense the concentration of weight in the hub.


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PostPosted: Tue Jan 24, 2012 12:48 pm 
South East Deputy AEC
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Joined: Mon Feb 22, 2010 7:27 pm
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Location: Angmering
I remember passing a chap riding the 8(?) speed one at the big dog last year and he was doing a lot of swearing at it :lol: I asked him if he did that a lot and he replied in the affirmative.


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PostPosted: Tue Jan 24, 2012 1:40 pm 
retrobike rider / Gold Trader
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Joined: Tue Nov 03, 2009 10:00 pm
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Location: Newcastle Upon Tyne
I have tried the 8sp and found it smooth as silk, the weight was noticeable on lifting the bike only, the balance is way off with one fitted, though it was on a non suspended dale.

The great thing apart from bombproof built, was the fact you can change gear at a standstill. Came in handy around town, on the beach etc.

You could be in top gear, emergency stop, knock it down, then lat off up a hill of from traffic lights.

11sp is going down well with the fatbike groups in hard areas.


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PostPosted: Tue Jan 24, 2012 1:42 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Tue Nov 03, 2009 10:00 pm
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Location: Newcastle Upon Tyne
IGH section on mtbr

http://forums.mtbr.com/internal-gear-hubs/


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PostPosted: Tue Jan 24, 2012 2:18 pm 
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Joined: Tue Aug 07, 2007 12:22 pm
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Location: Platsa, Messinias, Greece
I've no experience of the 11 speed but I've been using the 8 speed for a couple of years now.

The only negative (for me) is the weight - it's most noticeable when you pick the bike up to chuck it over a gate or fence but you do notice it a bit while you're riding too. It just takes a bit more unweighting to get the back wheel up steps and over logs and the same with endo turns on downhill switchbacks - you've just got to exaggerate your weight shifts a bit.
Being able to select a gear when trackstanding or coasting is something that you only appreciate when you go back to a derailleur system and realise that you can't do this.

Engagement feels "soft" (it's the roller clutches) and if you have come from a fast engagement hub like a Hope SS (and, if like me, you tend to ratchet a lot in trialsy type sections) then it takes a bit of getting used to.
The weight fairly low at the back does make the bike feel very "planted" on steep techy stuff though.
For the sort of riding I do I love it, no mech to get caught in heather and branches or drag along in the mud, no chainslap, less faffing and cleaning time.
I've got mine geared low, at 32:23 - I don't mind the lack of top end speed because I'm used to riding a singlespeed, I think I can spin pretty well and I don't have the brute strength to push huge gears on the flat anyway.
Most of my riding is all up, or technical and slow or steep down anyway, plus I'm no racing whippet anymore. Having said that, I did do one race on it last summer and felt quite smug every time I heard derailleur gears ratching and grinding after being caught out by some steep little blind climb.
I did ok too - probably as well as on any other bike.

From what I read, the last iteration of the 8 speed (SG 501) is proving more reliable than the 11 speed - there seem to be a few people complaining of indexing problems etc.


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PostPosted: Wed Jan 25, 2012 8:59 am 
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Joined: Tue Dec 01, 2009 11:37 am
Posts: 256
Location: Holland
The internal gear hub is best invention since flushing toilets and sliced bread :)

I have no experience with the Allfine but my regular non-retro ride is a Rohloff equiped bike. The weight is noticable in the beginning, but so was the weight of your first suspension fork. You mostly notice when bunnyhopping or doing some of the higher drop-offs. But you get used to it quickly.

Immediate and standstill (or non-pedalling, during) gear changes are fantastic. Standing on the pedals in downhill you already can select the right gear for the next climb. Cable stretch does not affect the shifting (the clickety mechanism is in the hub, not the shifter) and maintenance is close to nill. The biggest plus: it's virtually impossible to make shifting mistakes and on wet muddy rides, the IGH always works.

Frankly, I am surprised I don't see more IGHs on here in the 98+ section. Most members coming from a rainy island and all that :)


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PostPosted: Wed Jan 25, 2012 9:11 am 
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Joined: Mon Mar 30, 2009 7:41 am
Posts: 1083
Location: Christchurch, New Zealand
How does the weight of an internal geared hub compare with a front and rear mech, 2 extra front chain rings, rear hub, cassette, extra shifter, extra outter and inner cable, longer chain etc?


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PostPosted: Wed Jan 25, 2012 9:21 am 
South East Deputy AEC
South East Deputy AEC
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Joined: Mon Feb 22, 2010 7:27 pm
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Location: Angmering
Stu Mcgroo wrote:
So, to start, the weight of the bike with the 30 speed SLX gears was

29.63 lbs

Then I removed;

XT rear hub, XT skewer, 32 x 290mm spokes and stainless nipples, 11-34 10 speed cassette, 10 speed chain, SLX rear mech, SLX front mech, standard SLX chainrings, left and right SLX 10 speed shifters and cables and 2 zip ties.

Added were;

Alfine 8 speed hub with 20T Alfine Sprocket and fitting kit, 32 x 285mm spokes and stainless nipples, Alfine 8 speed trigger shifter and cable, BETD Goldtec 32T chainring, 4 x 5mm spacers (to get chain line and utilise standard chainring bolts) and SRAM PC7X Chain.

Weight of bike with Alfine was

29.68 lbs

However, that was all done at my mates (weighed with the gear cable wrapped round the handle bars), next day at home I came to set the gears up and found the gear cable was way too long, shortened it by 480mm and weighed in (at the post office) what I removed at 19 grams which converts to 0.04 lbs and brings the total bike weight down to

29.64 lbs

So to summarise, my bike with 8 speed Alfine is 0.01 lbs (0.008 lbs or 0.13 oz or 3.68 grams to be exact) heavier than the when it was equipped with 30 speed SLX which I think you’ll agree is diddly squat.



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