Published on: April 4, 2011

Regina Corsa for Frank the Welder

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Robert D Merrill

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30 Year Old Regina Corsa Receives the full Spa Treatment

Regina, Mallard, and European freewheels in general, are sort of a hit or miss experience. They can be a challenge to disassemble. Their cogs don't like to thread off the body, and the retaining ring tends to remain stuck tight. No matter how much the threads are soaked in penetrating oil, they like to stay together.

It was a real privilege to have Frank the Welder send me his Regina Corsa 5 speed for the full Spa Treatment. Frank is a legend in the MTB world and is a member of the Mountain Bike Hall of Fame. I was honored to see what I could do for his 30 year old freewheel he planned to use on a vintage Raleigh restoration.

Frank's freewheel could not have been more cooperative! All but one of the cogs threaded off! The retaining ring threaded off! Out came the bearings, the pawls and the springs. All the pieces went into the cleaner, and came out in great shape.

All of the Corsa cogs thread on to the body. Frank's 4th cog would not come loose. But all the parts cleaned nicely.

Side view of body showing the threads for each cog. The two largest cogs thread on from the back of the body.

The pawls and springs cleaned and ready for 10,000 more miles of service.

Bearings greased, pawls oiled, springs installed, and ready for reassembly.

Frank will be pleased. His Regina Corsa has at least 10,000 miles or 10 years before another Spa Treatment is needed.

23 Comments

Cary - 14 years ago

Thank you for taking the trouble to present such a nice pictorial on freewheel disassembly! After awhile, that's the only way to get the road grit out. Best Regards, Cary

Pastor Bob - 14 years ago

Carey, Thanks for your comment. I hope to put up more pictorial self helps in the near future. For now I'm spending too much time riding and wrenching my other bikes!

Captain Blight - 13 years ago

If memory serves, I believe I remember reading that on *some* Regina freewheels, the 4th cog was reverse-threaded. I don't know how many of these you deal with, but the next time one comes your way, try twisting the other way and see what happens.

Pastor Bob - 13 years ago

Captain B,

Thanks for your comment! The challenge I ran into with Frank's Corsa was that there was no easy way to hold the body once the other cogs had been removed.

If memory serves me correctly, I tried threading on two of the smaller cogs to use to hold the body, but when I tried to remove the 4th cog from the rear of the body, it would unthread the outer ones.

Since I could easily clean the 4th cog while attached to the body, and Frank did not need a new cog, it made sense to just let it be. The end result, a clean, greased and smooth running freewheel, was achieved!

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Pastor Bob - 13 years ago

I'm delighted I could inspire. Glad you found me. Best of luck on your blog.

Alex - 10 years ago

Have you counted and recorded or have knowledge of how many ball bearings Regina Corsa has in each bearing group? I think mine has some missing, but I can't tell you the numbers of the top of my head as I am not near the bike... Thanks

Robin Cornish - 5 years ago

Counting up from the photos here confirms my Regina G. S. Corsa ball count.
32 outer 48 inner.

WILLIE - 10 years ago

I have no idea of these parts. All I know is take my bike to the shop.

jake - 10 years ago

Their cogs don't like to thread off the body, and the retaining ring tends to remain stuck tight.

Bob - 9 years ago

Just commenting that it looks like this type Freewheel has an"always attached" center cog (???) Looks like an OK design -- but you would always be stuck with that cog in center area?
Is this correct?

Seth - 9 years ago

They look like new ! Great job!

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Nettie - 9 years ago

hehe. it deserves that spa in the end for the job that its done!

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