Right side drive

[Joepostal]

I am working out a right side dual drive to a nexus 3 speed hub (or some other 3 speed hub) and I have not seen it so I thought I would ask.

Can I use a 3 speed front derailleur trigger shifter to change gears on the nexus 3 speed?
Like this one.
http://www.beyondbikes.com/ItemMatr...utm_medium=GoogleProduct&utm_campaign=Froogle

Or is there some other 3 speed that has a 19 tooth sprocket that works with the GGoodrum adapter that is a left side trigger shifter?
I want the shifter to be on the left handle bar.
http://www.tppacks.com/proddetail.asp?prod=EBKE-x-FWAdapter

I am also needing to purchase a rim and spokes for 135mm 20" BMX rim... Damn project taking too long
I keep explaining to people next time you see me you won't get to ask any questions

Thanks everyone, Can't wait to get the motor mounted and the new rear wheel now that I have finally chose a direction.
Joe

 

[deardancer3]

I only have nexus 4 and 7 speeds in the garage, so not lots of help tonite.

The odds of a 3 chainring front derailer shifter having exactly the correct amount of cable pull for a nexus 3 speed hub is pretty small. If it were me, I would consider some of the following:

Check to see if your nexus 3 speed ignores "overshifting", that is- as long as you have given at least as much cable travel needed, then the internal hub ignores the excess cable pull; so if you are centered on #2 rear gear, then as long as your cable goes at least the desired amount, it shifts to 1 or 3 depending on cable travel direction.

getting the nexus shifter with a gear number inside the shifter, pop the cover and make a new label with inverted numbers. install shifter on the left upside down. true you rotate a different way, but your left hand will learn.

use your front derailer shifter idea with a micro adjust clicking shifter, then put some indicator on it that corresponds to your nexus hub.

modify a "travel agent" brake adapter to give the right amount of cable travel with your shifter?
http://www.problemsolversbike.com/pdf/PS_travel_agent.pdf

Do you know the cable travel on a nexus 3 speed?

best

d

 

[Joepostal]

OK well I suppose I will just get a nexus and find out I don't know the length of the shift and I also don't know if it is forgiving...

I will post back here when I find out.

Thanks for the ideas I will be doing one of the things you mentioned if I can't do the trigger shifter.

Joe

 

[Joepostal]

I found this shifter for the SA 3 speed
http://smartbikeparts.com/search_details.php?itm=SBP99813

And I found this 20" pre-built wheel for so cheap it sounds too good to be true.
http://www.utahtrikes.com/PRODINFO-Sturmey_Archer_3_Speed_Wheel_Kit.html

edit add sprocket sa 16t sprocket.
http://www.bikeworldusa.us/Sturmey-...froogle&utm_medium=organic&utm_source=froogle

Hopefully I can fit the click shifter on the right side. Now to convert my 1stage 3210 to right side drive.
Joe

 

[rkosiorek]

the index positions are wrong. so if it is an indexing shifter it will not work properly. you could use one that was friction only.

but the 3 speed shifters are not that expensive.

rick

 

[GGoodrum]

I bought that same 20" wheel-mounted S-A 3-speed hub. At $49, it was cheaper than I could find the Nexus-3 hub by itself. It is still going strong on my 20" Port Runner, with the 3220 setup:



The wheel/hub came with the standard twist-click shifter, which I mounted on the left.

-- Gary