Suntour power thumb - wassat then?

[sparkybhp]

Hiya all, forgive my ignorance but can anyone enlighten me on these pretty little shifters? Just picked up a vintage bike and wondered - these should be ok fiction shifting on an older 3x7 setup shouldn’t they? They came on a proper old tandem which is a bit too far gone for me to fix up..

And scuse my grubby foot in pic 2 - it’s warm today..

 

[legrandefromage]

They are shifters

For your thumb

Obviously

They are decent enough and should be fine

 

[gtturbo]

Run them on friction and they will pretty much do any speed.