Michael F

Hi All,
I am interested in a set of wheels that came up for sale locally. They have nice Ambrosio rims on Nuovo Record hubs but the freewheel is some cheap SunRace unit.
Can that freewheel be swapped with a Regina CSX I have mounted on a Campagnolo Triomphe hub?
TIA

bikemig 

what matters is the threading. the wheels you're looking to buy should be english threaded if they have a cheap sunrace unit. are your wheels english or italian? If the latter (i.e., italian), just buy a better, english threaded freewheel for the campy NR wheelset. if the former (your regina freewheel is english threaded), you're good to go.

Jeff Wills

Yes. The freewheels will require different removal tools, but the threads on the hubs are identical.

The only possible glitch is if the SunRace freewheel is 5-speed and the Regina is 6-speed. You may need to find a longer axle, add a 5 or 6mm spacer on the right side, and adjust the dish of the rear wheel. This was routine back when these wheels were popular.

fietsbob

Freewheel Cogs wear out, you cannot replace a worn out Regina, except at collectors NOS prices. If you will ride the bike and not just collect it.

Sun Race is a Pretty big company these days, they own the Microshift and Sturmey-Archer companies, Now.

Michael F

Wow, all these great replies already! I should have mentioned the SunRace is a 5 speed whereas the Regina is a 6, another reason for a swap, the Regina is still in great condition too. So 2 removal tools would be needed but I`m a little confused as to the threadings, did Campagnolo offer 2 different (English/Italian) threads for each hub model?

Spaghetti Legs 

At some point in the 80's, maybe late 70's, the Record hub went to English thread. It should be clearly marked on the on the hub near the freewheel threads. That being said, the only difference between the two is thread pitch and the general rule of thumb is that it's OK to put an English thread freewheel on an Italian thread hub, but once done, you shouldn't go back to using an Italian thread.

Grand Bois

The cheap Sun Race freewheel will probably give you much better shifting due to the modern design. I have swapped my Reginas for modern freewheels with twisted teeth.

philbob57

There were at least 3 FW threadings: English, Italian, and French. English and Italian are very close. Per wisdom passed down through the ages, it's OK to spin an English FW onto an Italian hub, but it's not OK to go back. French threading is not close enough to either English or Italian to allow mixing.

I expect you'll find very few French-threaded Campy hubs in the US; I mention it because you are likely to find some French-branded, French-threaded hubs on French bikes from the bike boom and earlier.

Bandera

Even when brand new the Regina freewheels of the 60/70's were never in "great condition" compared to the quality/shifting standards of Suntour of the era and certainly not Shimano HG.
Nothing wrong in terms of performance/durability w/ Sunrace, and they can actually be removed from the hub w/o histrionic effort/catastrophe.

-Bandera

JohnDThompson 

OP has a SunRace freewheel on the hub at present; these AFAIK are only available in English/ISO thread.

Michael F

Thanks to all that have replied so far. I`m hoping to pick these wheels up this week and will give them a go as they are, I`m not even sure of the cog count either, the seller is slooow to respond .
I think I`ll forgo the Regina swap in any event and just keep that set intact and just upgrade the SunRace if needed.