Anyone know why such a hub would exist?
Bike Forum
81 gears?
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Posted 10 months ago #
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How do you get 81? Single ring up front, 9 speed cassette, so its same as 3x9? Which is 27.
Posted 10 months ago # -
RealMan - Member
How do you get 81?
three rings up front. 3x3x9=81.
Sheldon did it ages ago btw, albeit with a smaller cassette. He seemed to suggest it was a bit pointless.
[eidt] Here it is: http://sheldonbrown.com/otb.html#63speed
Posted 10 months ago # -
Unless you run a triple up front!
Is that the point then - to do away with triple rings?
Posted 10 months ago # -
The Cycles Maximus trikes (the ones that some cycle taxis, and parcel carrying couriers use) have a similar setup, although I think they have just 2 rings at the front.
You can achieve a stupidly low gearing which is essential for getting heavy loads up steep hills. I occasionally used to deliver bundles of newspapers to shops and newsagents, and was glad to have a super wide range of gears.
Posted 10 months ago # -
jackthedog - Member
Anyone know why such a hub would exist?Folding bikes. Front derailleurs can be impossible to fit on some.
Problem solved by using a 3 speed hub with an ordinary rear derailleur.
Anyway how about 16X14 = 224 ratios?
One of these (Cambiogear 16 speed front ring) with a Rohloff.
Posted 10 months ago # -
The Cycles Maximus trikes (the ones that some cycle taxis, and parcel carrying couriers use) have a similar setup, although I think they have just 2 rings at the front.
Ah, interesting. Useful for cargo bikes then.
Folding bikes. Front derailleurs can be impossible to fit on some.
Problem solved by using a 3 speed hub with an ordinary rear derailleur.
Ah, okay.
Anyway how about 16X14 = 224 ratios?
Ha, nice. Think we could bodge a Cambiogear jobby to a Hammerschmidt + sturmey 3 speed with 9 speed cassette?
3x9x2x16 = 864 ratios?
Posted 10 months ago # -
Or you could use a NuVinci hub and have an infinite number if ratios, or a NuVinci and a triple up front and have 3x infinity. Or a triple on a hammershmit and have 2x3xinfinity
Posted 10 months ago # -
I feel like I'm missing something, why won't a 10spd casette fit onto that hub for 90 gear ratios?
front mech will deal with a 22T difference? 11-36T 10spd casette + the 3spd hub would give a fair range?
Posted 10 months ago # -
jackthedog - Member
'Anyway how about 16X14 = 224 ratios?'
Ha, nice. Think we could bodge a Cambiogear jobby to a Hammerschmidt + sturmey 3 speed with 9 speed cassette?3x9x2x16 = 864 ratios?
That would give the gearie boys a few things to twiddle with when they're riding.
Posted 10 months ago # -
I'm sure the 3 or 4 speed hub with a two speed derailleur was not uncommon in the Fifties (from the pictures I have seen).
Posted 10 months ago # -
Probably 15 years ago some bloke brought a bike into the shop I worked in going on and on and bloody on about how he'd customised it to give 75 gears. It was done on the same principle, hub gear bodged with a cassette.
All we could think of was "WHY?"
It was one of those weirdy-beardy types who can never just make do with off-the shelf, always felt the need to customise and bodge, not because it was better, just to be different.Posted 10 months ago # -
Whatever happened to those NuVinci things? Can you buy one yet?
Posted 10 months ago # -
I feel like I'm missing something, why won't a 10spd casette fit onto that hub for 90 gear ratios?
Can you run 10 speed with a triple up front? I assumed not, which is why I didn't originally mention it, although that now seems like a ridiculously insignificant compatibility concern after the idea of bodging together a Cambiogear and a Hammerschmidt came up.
Posted 10 months ago # -
It was one of those weirdy-beardy types who can never just make do with off-the shelf, always felt the need to customise and bodge, not because it was better, just to be different.
I know that sort. The chap I'm thinking of was welding together some hideous cargo trike abhorrence the last time I spoke to him.
Posted 10 months ago # -
I like the idea of this hub. Will be nice to see how it performs
Posted 10 months ago # -
I can't see the point myself,
derailleurs give you lots of gears and light weight but the swingarms are prone to strike and mud clag
hubs are good for chain route and simplicity but are heavy over the axle and not as many gears
this 'solution' is the weight in the wrong place with a swingarm. worst of both bits..
Posted 10 months ago # -
crazy-legs - Member
...It was one of those weirdy-beardy types...One of those stares out my mirror every morning. One of these days I'm going to shave him...
Orange Crush - Member
I'm sure the 3 or 4 speed hub with a two speed derailleur was not uncommon in the Fifties (from the pictures I have seen).Yes. I've got one, needless to say (weirdy-beardy). Basically it was 2 cogs threading onto an adapter that fitted where the normal single cog went. I can stick a pic up in the unlikely event that there is anyone interested.
Edit:
I've just thought of a good application for that hub. On the back of a fatbike. 2 chainrings and 2 cassette type cogs like a dingle speed - no derailleur needed. That would allow one 2 set of 3 speed ratios to be ultra low for very soft going, and the other for normal going, eg 24F/23R and 32F/15R. Much lighter than an Alfine and good range.
Another edit:
Max rear allowed is 34T, so you could have 22F/32R and 32F/22R which gives a very wide range.
Posted 10 months ago # -
"Can you run 10 speed with a triple up front? I assumed not"
Shimano offer 3x10, though in 24-32-42, an 18T range
IIRC SRAM are also offering 10spd compatible triple chainsetsPosted 10 months ago # -
SRAM have been making 3x7 for years. Was mainly the preserve of folding bikes, recumbents and cargo bikes. I'm surprised that Sturmey Archer have taken so long to catch up.
Posted 10 months ago # -
I can't help thinking that combining a derailleur with a hubgear gets you the worst of both worlds.
Posted 10 months ago # -
Hmm, Nuvinci seems really cheap compared to Rohloff...
EDIT: Holy cow!
"The latest N360 model weighs approximately 2450 grams.."
Posted 10 months ago #
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