AaronAnderson

Wow. iMotion3 is only 66 bucks.

AaronAnderson

Eww. The shifter on for that is fugly.

fietsbob

SO, As yet un certified. Mark Beaumont is the last successful, certified, best time.



https://road.cc/sites/default/files/C...%20fastest.pdf

tcs

Man, it's nearly a full time job correcting the mis-information some folks put out.

https://www.genesisbikes.co.uk/news/0...rd-is-official

RaleighSport

What do you guys think of the Internal 2 speed kick shift hubs?

tcs

Sturmey S2 road test.

SRAM's Automatix 2-speed should be on the market shortly (reference only - no connection to retailer).

garage sale GT

Most modern IGHs are grease lubricated and can feel a bit stiffer in cold weather.

Dan Burkhart 

My winter bike has a Sturmey Archer XRF5. I've ridden it down to -18c (0f) and if it's stiffer, I don't notice, what with all the extra clothing restricting my movements.

garage sale GT

I had a 3-speed Nexus with a coaster brake. The close fit between the pads and hub surely affected it if it was cold. These hubs also have more bearing balls than an ordinary hub.

photogravity

As a kid, I remember having a 3-speed bike that was the bees knees and I ended up trading it to some kid in the neighborhood for something inconsequential. As it turns out, I kicked myself for a long time after that because the bike was surely better than what I got in trade. He got the better deal when he somehow convinced me that what he had traded was as good as my cool 3-speed bike.

Well, now I'm back riding and the derailleur geared bikes I started out with are being replaced by internal hub geared bikes as quickly as I can pick up hubs at reasonable costs. IGH all the way!

AaronAnderson

Sounds like my dad

Danny1962

Oh Photogravity, I feel your pain. About 25 years ago I got rid of a perfectly good 3 -speed bike, and I'm now wishing I hadn't. I'm sure it would still be going strong now. They don't make them like that anymore -- those old English bikes can go on forever.

Since then I've had several mass market derailleur bikes that haven't really been up to the job.

I'm now back onto IGH bikes and I can't ever see me buying a derailleur again.

noglider 

To my thinking, the standard drawbacks to IGH's are small: weight, complexity, difficulty with servicing, difficulty with wheel removal, friction. The only reason I don't ride them much is cost. I own far too many bikes, and I've built many of them out of parts I collect. Adding an IGH is expensive. The new ones are not cheap, yet I can pick up derailleurs etc for approximately free.

I've heard tremendously happy reports about all the recent IGH's. There were some problems for a while, but the reports are that the current generation have the kinks worked out.

I have a strong preference for Sturmey Archer over Shimano. Some of that is mere bigotry, but Sturmey Archer still has parts available for the AW hub, out of production for many years. They may have parts for other hubs. Their product line is very intriguing.

I test rode a Shimano Nexus 8 speed. It felt lovely.

IGH's are easier on chains, and they use wide chains, which are intrinsically stronger, so you have two factors that add together to huge chain reliability and durability. They are impervious to more weather-related failures than derailleur systems are.

My daily ride is a 1962 Rudge 3-speed. You're supposed to drop some oil into an AW hub every month, but most people don't do that for literally decades, and the hub will most likely forgive you. This thing is amazing. And I love the way I can shift into 1st gear while stopped at a light, for a quick, easy getaway.

AaronAnderson

Will a double or triple chainring work with an internal hub provided the use of a pauls tensioner? https://www.cambriabike.com/shopexd.a...m=021588000306

noglider 

It might work, but you'd have a chainline concern to solve.

Mixing IGH with derailleurs gives you the worst of both. I don't see the point except that it's funny.

Oh, and a 1x9 (or one by anything) is often hard to perfect because of chainline problems. That's why nearly all derailleur bikes have more than one chainring.

One problem with the new Sturmey Archer IGH's is that direct drive is the lowest gear. They're probably designed with small-wheel bikes in mind. To get a reasonable range, you need a giant cog or a comically small chainring. I'd still try to make that work, though, given my affection for Sturmey Archer and my bigotry against Shimano. Hey, I'm honest.

AaronAnderson

I don't care what it LOOKS like. I care how it functions

noglider 

I wasn't talking about looks. Are you talking about my mentions of chainline? That's a technical problem.

AaronAnderson

I juxtaposed the last 2 parts of what you said together. Safely ignore me.

The IGH hubs are rated as having a "256% gear range" - how does that compare, or how do I figure out what my 83 voyageur currently has?

fietsbob

My Rohloff has a 526% range . low is 0.279:1, #11 is 1:1, and high is 1.467:1.

the external drive chainring is to be no smaller than 2.4: 1 ,
a 38:16 is on my 26" wheel bike.
Is Right there ..
higher is fine , so my 20" wheel with the 53:16 hub is strained less..

its a 7 speed hub used twice. 2 ranges,
there is a double reduction gear for gear 1 - 7 .

Low like a 22/34, high like a 42/12 in a mountain bike.



have to count teeth on that voyager and do the math

Gear inches, is F Chainring divided by R sprocket x wheel diameter size..

AaronAnderson

My head is spinning.

photogravity

Danny, I have to admit that I'm somewhat of an outlier with regard to most things and frequently go against prevailing trends. I started using Macs when Windows PCs were at their peak. I drive diesel engined cars in spite of the availability of lower-priced (on the front end at least) gasoline engined cars and contrary to the current trend of hybrid and electric cars. In my work, I'm a full-time union steward, in spite of the decline in organized labor in recent years. Sometimes, I'm ahead of a trend and sometimes I'm behind the trend, but there has be be some practical value before I'll buy into something. Once I have made a clear determination on something though, I will pursue it with all I've got.

My move toward IGH bikes is one of those things: I believe strongly that there are many advantages to IGH bikes over derailleur designed machines and now I've bought into it, you're not likely going to change my position. With that said, there is a level of pragmatism to my positions. For instance, I have two tandem bicycles that, at least for now, are unlikely to be converted to IGH because of the current high cost of a hub that will handle the torque a tandem team delivers through the drive chain. As far as the remaining non-tandem derailleur bikes are concerned, they will either be culled from the collection or converted to IGH as time and funds become available.

tcs

"Try?" It's not hard.



Since you weren't talking about looks, how is this technically or functionally "comical"?

fietsbob

not to mention , for the fashion conscious, S3X comes in several colors..

******

Rohloff hub is used in tandems , they even offer a special hubshell for tandem applications.

A running change offered after a couple adventure tandem teams found the amount of
bad roads in the Andes, on a self supported tour, loaded up, to fatigue a couple spoke holes.

Scheherezade 

IGH friends, what would be a good chainring/cog combination to get about 50 gear inches in direct drive for this bike? https://www.bikesdirect.com/products/..._wt5.htm#specs I came up with 42/22, but that's about it. I like just about everything about this bike, except for the gearing (48/16). The stock gearing gives you a whooping 130" in high gear, =S

fietsbob

Tooth count : ( chain ring [48] divided by rear cog [16], = 3) x wheel diameter,
say 27 inches.
is = 81 gear inches

A 3 speed S3X uses a direct gear on top, + 2 reduction gears ..

so what to change , bigger cog, smaller chain ring or both?

https://sheldonbrown.com/gears/internal.html
does the math for you.

still 48/16 .. S3X is 1st: 50.6 2nd: 60.8 High 81.0

Low is 0.63 :1 on that hub , 2nd is like the low on a AW3 hub 0.75:1 .