Reddit mentions of Sunlite Alloy Double MTN Lever, Black/Silver

There are several hubs out there.

Shimano:

• 3-speed (186% range)
  
• 7-speed (244% range)
  
• 8-speed (307% range)
  
  • And this weird disc + coaster brake version (SG-C6061-8CD) which might give you the best of both worlds. It also has Di2 automatic shifting which some people prefer. Price is okay @ €150 however when combined with the rest of the DI2 setup it's probably expensive.
    
    Sturmey Archer:
    
    
• 2-speed (138% range)
  
  • Kick shift, so you don't need cables to switch gears. Takes some getting used to.
    
• 3-speed (177% range)
  
• 5-speed (243% range)
  
  As for levers, depending on what kind of brakes you are using, you could also look at using 4-fingers levers, designed for drum brakes. It's how early mountain bikers gave themselves extra leverage. Another option might be Sunlite dual brake levers which enable you to control 2 brakes with a single hand. Though that might be unwise in your case.
  
  ​
  
  Bike suggestions:
  
  
• Vintage bike: An affordable option would be to look into classic 3-speed bikes (brands and models depends heavily on where you are located) and have a bike shop rebuild a wheel with one of the above hubs. A classic Dutch bike would fit the bill too. One advantage of these bikes is that they are often setup quite well already for commuting and have a more relaxed geometry which makes for a more forgiving or relaxed ride.
  
• Hardwearing commuter: Around here we have this bike-leasing company and a friend of mine just got this bike. 7-speed coaster brake, dynamo hub and roller brake on the front. Very practical bike all around!
  
• Stylish commuter: Veloretti makes bikes with just a coaster brake (which works fine in the Netherlands) and has some decent customization options. Front brake optional.
  
  These were just some suggestions as an example, not an endorsement of any of these. Though from what I've seen they are all high quality bikes.

https://www.amazon.com/Sunlite-Alloy-Double-Lever-Silver/dp/B000AO7H16

I don't know what the point is though.

Better for the application.
http://www.amazon.com/Pyramid-Alloy-Mountain-Cable-Brake/dp/B000AO7H16

I regularly (for a decade or so) see a 1-armed bicyclist on my commute, he's going the opposite direction so we've never spoken. Guy in his mid 40s; he rides a bike with no obvious mods.

One thing that you'll definitely want to do-- there are a variety of brake levers available that actuate both brakes from a single lever-- this is one example: https://www.amazon.com/Sunlite-Alloy-Double-Lever-Silver/dp/B000AO7H16

http://www.amazon.com/Problem-Solvers-Cable-Doubler-Brakes/dp/B001CJVLRO


http://problemsolversbike.com/products/cable_doubler/


http://www.brakedirector.com/


http://www.amazon.com/Pyramid-Alloy-Mountain-Cable-Brake/dp/B000AO7H16/ref=pd_sim_sbs_sg_1

Very clever, I like this idea a lot. I would also consider adding some sort of clip that could act like a parking brake.

As for the uneven braking, you could try a brake cable splitter or a dual cable brake lever so you only need one lever to operate both calipers.

There are double pull brake levers. I had one on my old gas bicycle conversion, because you need a brake lever for the clutch, and having 3 levers is a hassle.

A guy on our local forum lost a couple fingers on one hand, so he went to a lever that pulls both the front and rear mechanical brakes using a lever like this. I guess it works out pretty well for him and is better than the option of only having one brake.

The thread on it can be found here: brake levers for a cripple?

Seems like an absurdly clunky and expensive ($300!?) device that doesn't appear to do anything that existing levers that pull two cables don't already do. For $13.

Sunlite Alloy Double MTN Lever, Black/Silver https://www.amazon.com/dp/B000AO7H16/ref=cm_sw_r_cp_api_0QgYzbFXXTRE2

Perusing SRAM's website the main benefit they tout is being able to shift both sets of gears with the same shifter.

I feel like it wouldn't be that difficult to just make a shifter that could shift both a regular FD and RD though...similar to those dual brake levers although a dual shifter would need 2 separate mechanisms.