on 6/13/02 5:40 PM, NortonMarg@aol.com at NortonMarg@aol.com wrote:
> In a message dated 6/11/02 6:36:14 PM Pacific Daylight Time,
> krawls@visuallink.com writes:
>
> << The ultra 6 was a narrow
> spaced freewheel designed to work in the space of a 5 speed freewheel on
> frames with 120 rear spacing. >>
> My recollection was you had to add 1 to 2 mm to make this work.
>
> <<The 6 speed standard was designed for 126
> spaced frames.>>
> My recollection is 125mm?
>
> <<They then came out with the 7 speed ultra to work in place
> of the 6 speed standard. All 7 speed freewheels by Suntour are the same
> width.>>
> Was this the switch to 126.5?
> Stevan Thomas
> Alameda, CA
> _______________________________________________
Yes,120mm 5spd, 125mm 6 spd, 126.5 7spd(you set the frame rear forks 1mm
wider). Just as important that 1.5mm is added to the right side of the axle
for frame clearance. The Campy hubs were designed for Regina Corsa and Oro
freewheels. 35mm for the 5 and 36.mm for the six (I belive this info is in
cat #17). While all standard spaced Suntour freewheels were almost 2mm
wider(than Regina or Atom)), the Suntour ultra six was I belive 3.7mm wider
than a Regina 5. All sevens are "ultra" the Shimano Dura Ace/ Sante and the
Regina CX/America are the most narrrow. If your right seatstay had a fat
dome or the drop out was thin 1-2mm wouldn't do it , but yes if the
framebuilder was also a bike mechanic that would be enough! I used normal
sixes with my super record rear. It had no spring tension left for the small
cog on the sevens making for very sluggish shift(even with bending the
spring).
I used to be an authority on this. I gave about the same info and more to
Howard Sutherland for his first edition.
T. Shaw
Santa Clara, Calif.