Dynohub choices. Kasai brand.

[jht projects]

For anyone interested in a hub generator, there are more choices and more competition than ever.   Another brand of dynohub has entered the market.   Kasai.

This is in addition to 

SON (Schmidt),

Shimano,

Shutter Precision (SP),

and

Sturmey-Archer.

Related:  

For people interested in recent testing results of various dyno hubs, this touring-focused website has some data.

http://www.cyclingabout.com/dynamo-hub-drag-lab-testing/

Joe T.

[Andrew]

Kasai looks just like another badge engineered SP.

That test includes the SONdelux but not the equivalent SP SV-8, and omits considering what electrical output power each is delivering. It's not vastly different between the better options, but knowing your energy is producing more power can change your decision.

I've got the SV-8, PV-8 and SONdelux and from my less scientific but probably comparable enthusiastic spin in a stand with either similar or no tyre weight and watching the time to stop, did not show the same difference.

[CJ Arayata]

Sorry for resurrecting a zombie thread. Doing some research for an upcoming n+1 build and trying to decide on what dyno to get. Have both Shimano and SON on other bikes, but came across information about the new Kasai "Field Serviceable" hub. Looks intriguing, especially for this audience. I might consider it. Maybe not as concerned about repairing in the field, but just the mere fact it can be serviced at all is a huge plus IMO.

Not that I would do this myself, but my cycling cap off to anyone dedicated enough to the randonneur ethos to carry a spare coil assembly!

https://bikepacking.com/news/kasai-dynacoil-fs-dynamo-hub/

CJ "you-can-never-have-too-many-dynamos" A.

Philadelphia, PA, #9565

[Ronald Long]

I shouldn't even be looking at this - I have 3 dynamo wheels (all Shutter Precision, each with several thousands of miles of trouble free service), but it has always bugged me that, if service is required, it's a fairly complicated process.
If I somehow convince myself that I need another one, will definitely look at this very seriously.

[Lee Legrand]

Hi CJ,

Adem Rudin in the link you sent speaks about how this hub is not really that serviceable.

"Merry Sales/Kasai's selling point is "hey look you can fix the hub without disassembling the whole dang wheel, no unlacing required to swap out the coil" - that's what they mean by "field serviceable", you don't have the send the hub back to them to get the coil replaced at the factory.

The non-power-side bearing is independently replaceable. The coil/plug/powerside bearing are replaceable as a single unit and the bearing is not intended to be serviced on it's own.

Someone got over-excited and made some unfounded assumptions when writing this article."

--
You received this message because you are subscribed to the Google Groups "randon" group.
To unsubscribe from this group and stop receiving emails from it, send an email to randon+un...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/randon/906f1fd2-4fa0-45c0-80a1-b6dea734bba6n%40googlegroups.com.

[Bill Gobie]

FWIW my oldest SON hubs are 15 and 11 years old and have never needed any service.

Bill

To view this discussion on the web visit https://groups.google.com/d/msgid/randon/CADicBaZLNYGkM9C5Hqdr9jBLEQ16GXKnps4a_b2bFWtdzDTtwA%40mail.gmail.com.

[Lee Legrand]

Not to hijack the discussion but I think bicycle parts that can wear out, should be serviceable.  I like the idea of a serviceable front dynohub front and I like the idea of bicycle parts that can be fixed or you can buy the parts from a bicycle store and/or manufacturer who makes them although, I dislike the idea of someone making proprietary parts since they can go out of business or increase prices based on the popularity of their parts.  A good example of a bicycle part is the bottom bracket.  Grant Peterson is now selling a traditional bottom bracket which anyone with the tools can service themselves every couple of years and you can purchase the ball bearings from anywhere or get the spindle from bicycle stores.  I found a British company that sells front and rear hubs that are serviceable and anyone who cares, can learn how to put in a bottom bracket the traditional way or services, and maintain their own hubs. Yes, it is more time and it is easier to get the modern ones but why purchase items that eventually get thrown away?  Everything breaks down but we should limit what we can throw away and if we can recycle them into something else, try to do that as well.

Anyway, I like the idea CJ but I also think let someone else test them out first and see what the problems inherent in the design are.  It looks like it only came out this year but let's see what the long term use of these will have and they may be a viable option than purchasing SON hubs.

[CJ Arayata]

Yes, I didn't mean to imply it was actually field-serviceable. But being able to service it at all without unlacing or sending it back to manufacturer is a huge plus.

Unfortunately, Merry did not have the rim brake version in stock when I went through with my build plan. So I went with an SP PV-8 instead.

Anyways, finished the build this weekend. Here's some pictures, just for fun. Going to wrap the bars tonight. The real question is will I ride it for a hilly 200k brevet next weekend?

Best,

CJ