the ultra was a Suntour trade name , but that is essentially what a 7 speed freewheel IS,

a replacement for a standard withh 6 speed in the same frame spread.

just suntour was the 1st one to do that with a 5 speed , at 7 it was done market wide.

the for 8th the same spacing was used , just N+ 1 ..
A 12 screwed into a 13,which screwed into a 14 which screwed onto the body..


Ive got a big bag of suntour NWpro bodies and cogs they were a great design

as the external FW bearings were shielded with labarynth seals .

the way you lubed them was via a hole where it screwed onto the hub , covering it .

a purge and re-lube piece I got my Machinist father to make forced oil thru that hole ..



The lot can be sold , if interested .