2 to 3 speed

[ukoldschool]

No offence to 12 boy, but it seems kind of pointless to me to have feedback from somebody that has a dual chainring setup, especially odd ones (58 and 38). All talk about gear inches is completely redundant when you aren't even using a chainring that 80% of people would use IMO.

Id like to hear experience from somebody that has changed from a normal 2 speed or 3/6 speed Sturmey hub to this, with a 'normal' Brompton chainring (44/50/54)

 

[bikegang]

The Unibody cog set can easily be the base of 4 speed mod (11-14-17T + 21T).
Need a longer 4 speed free hub body though.

 

[bikegang]

Still snap ring (circlip) type, but you can see what they did to the end section
in order to squeeze in one more cog.

 

[Gunk]

A mint complete 2018 3 speed wheel just sold on Gumtree for only £80 this week including a new Schwalbe Marathon tyre, three speed shifter, cable and the chain tensioner. If you want to swap to 3 speed then a good used rear wheel is probably the way to go.

 

[12boy]

I have a 3 speed 177% ratio SA wheel. Wotks very well. But thehub alone weighs a little over 1000 grams. The chaIn pusher solution is much lighter although the range is less. Guess it is whatever your tastes run to.

 

[rogerzilla]

In t'olden days there was a simple 2-sprocket converter for a Sturmey threaded driver. The threaded driver isn't any good for an SRF3, which is a totally different design to the old AW, but AWs are two a penny and this might offer an easier solution.

 

[Gunk]

The Sturmey Archer 3 speed hub is a tried and tested piece of kit. reliable and needs very little maintenance, for a commuter bike it does the job very well once paired with a front chain wheel which makes the gearing comfortable.