Will Shift Kit work with internal hub transmission?

Fletch

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I have a bike with an internal hub 3 speed transmission and I'm curious if it would work with the SBP shift kit? Can it handle that much torque from an engine? Would it be worth it with only 3 speeds?
 
I know people use the internal hubs.As for how they hold up I would not know.But as for only having 3 gears that would be fine.It is really about the range between the gears.I have a 7 speed and only use 3 of the gears most of the time.I go first to third to sixth.& seventh is my freeway gear and I don't go there often!
 
just a few days ago, I asked SBP if there was any internal hub that they recommended besides the very expensive NuVinci, and their response was that they receive so many mixed reviews regarding LOTS of different internal hubs that the only one that they can confidently recommend is the Nuvinci shift hub (which is around $500).

WILL it work with yours? The SBP's shift kit works with any shifting system-- the point of the kit is that the motor drives the back wheel with the pedal chain while allowing the rider to switch between motor and pedals at will... which means you could even use the shift kit with a single speed hub if for some reason you wanted to...

So, will yours work at all? Yup. Is a three-speed transmission enough gears to make shifting worthwhile? I personally think so and plan to do so when I build my next bike. But is your internal hub good enough? THAT is hard to say... I personally would only trust the quality of one that was brand name, pretty new, rated to be rugged, blah blah blah... Maybe yours is all that... if you don't know, you can find internal shifting hubs that are half or less the cost of the NuVinci hub.
 
$299 NuVinci hub:

http://www.staton-inc.com/store/products/NuVinci_CVP_Model_N171B_Gear_ratio_350-531-20.html

Other options

:http://cgi.ebay.com/SHIMANO-ALFINE-...Cycling_Parts_Accessories&hash=item43a111afa9

http://cgi.ebay.com/New-Shimano-Alf...Cycling_Parts_Accessories&hash=item2c57c1f781



http://cgi.ebay.com/Sturmey-Archer-...799?pt=LH_DefaultDomain_0&hash=item3359ce61e7

Most of my issues on my MB are chain jumping and breakage, gear-jumping. Thinking about 8-speed running internal hub. The NV's price dropped at Staton's, which makes it comparable in cost to multi-speed internal hubs.
 
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One comment to 5-7, what if you take out links from your drive chain, thus putting more tension on the chain?

Also- For a few hundred miles so far- I am using a 3 speed hub as a jackshaft after a HF79.
Having gears is great. There is one problem with using this hub- it drops in and out of third gear at anything over a slow cruise, this is annoying. I tried making a reverse shift set-up so the little pull cable holds it in 3rd- still drops out.
I don't know how much power or abuse these Sturmy Archer old hubs can take. The response to other posts about the hubs is "not much".
 
One comment to 5-7, what if you take out links from your drive chain, thus putting more tension on the chain?

I've been taking out a link every time I break/replace the chain.

Thinking of NuVinci hub with 8mm chain.:unsure:
 
save your money & buy a friction drive kit. then you shift all you want
 
save your money & buy a friction drive kit. then you shift all you want

"save your money"? a friction drive motor and kit is more expensive than a SBP shift kit and a nice internal shift hub combined... shift kit is $200, a quick Google search of friction drive engines and kits show them being $400 and up... (I stalked the profile of the OP to see that he already has an HT installed; he's not starting from scratch...)


and if the 3 speed hub he has isn't durable enough for the chain-drive shift kit, it won't be durable enough to shift with a friction kit either. The exact stress might not be the same since the stress from the drive chain of the shift kit is "concentrated" on the shifting hub while the stress of turning the wheel with a friction-drive is spread out over the whole wheel, but the potential speeds are the same, and you still have the stress of the engine vibration...
 
save your money & buy a friction drive kit. then you shift all you want

Welcome to the forum.:cool:

LOL, been there, done that, many many times.:giggle:

FACT: Friction drive is NOT the best drive system for a high-winding engine with a very narrow powerband.:geek:

FACT: If you can harness a high-winding engine with a narrow powerband, you will have an AWESOME MB.:bowdown:

How do you shift with a friction drive kit?
 
shifting FD

IF YOU HAVE A MULTI SPEED BIKE YOU CAN SHIFT A fd BIKE (IF MOUNTED ON REAR WHEEL)
 
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