Regina Gran Sport Corse 4spd freewheel sprocket removal
01-17-19, 03:10 PM
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Regina Gran Sport Corse 4spd freewheel sprocket removal
Hi, I am trying to remove the sprockets from a Regina G.S. Corse 4 speed. My question is how many (if any) of the largest sprockets are left threaded and removed from behind? In an equivalent 5 speed freewheel, I know that this happens with the two largest sprockets.
Thank you for any help!
Thank you for any help!
01-17-19, 05:49 PM
#2
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Found it for you in the old Cinelli/C.O.N.I. manual. Two cogs go on from front, two left threaded cogs go on from back. Good luck.
01-18-19, 02:35 AM
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Thank you very much 63rickert! This information Will definitely help!!
By the way, I am removing the sprockets because the 16 teeth one is damaged. Does anyone have an spare one to sell? Regina sprocket 16 teeth threathed. Must fit GS 4 speed freewhell.
Thanks again!
By the way, I am removing the sprockets because the 16 teeth one is damaged. Does anyone have an spare one to sell? Regina sprocket 16 teeth threathed. Must fit GS 4 speed freewhell.
Thanks again!
01-19-19, 02:44 PM
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GS Corse freewheel bodies are same for four and five speed freewheels. On the five the crown wheel screws into the second position cog rather than onto the freewheel body. Assuming the 16 you want is a second position (for four speed) cog. It will be same as a middle position cog on a five speed or fourth position cog on a six speed. Disassembling other freewheels is the only way I know to find cogs anymore, unless you plain get lucky. If you want to shorten the search and buy a cog approximately now the one place I know that still has the patience and wherewithal to sell these parts is Yellow Jersey in Arlington Wisconsin. If they don't have it they will get it. Could take some time and will not be cheap.
01-19-19, 03:18 PM
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Tip -
make sure to check that cog teeth are intended for 3/32" catena.
Regina made 3, 4 & 5 V gear blocks for 1/8" catena.
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Tip -
make sure to check that cog teeth are intended for 3/32" catena.
Regina made 3, 4 & 5 V gear blocks for 1/8" catena.
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01-19-19, 04:09 PM
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Thank you very much for the answers. Knowing this compatibility between 4 and 5 speed bodies will ease the search. Ok 3/32" chain.
Also, I have asked to a blacksmith if he could reconstruct the broken teeth on the cog. Will see the result.
Thank you very much gor sharing all this knowledge.
Francesc
Also, I have asked to a blacksmith if he could reconstruct the broken teeth on the cog. Will see the result.
Thank you very much gor sharing all this knowledge.
Francesc
01-23-19, 02:44 PM
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Final update
So, I found a 16T cog for the middle threaded body of the Regina GS freewheel (2nd smallest position in a 4 speed freewheel). I found it in monsieurvelo.es an amazing vintage bicycle shop and repair shop in Barcelona. By the way, if I haven't found it, teeth reconstruction could have been possible. Laborious, but possible. Thanks for all your help.
Francesc
Francesc
