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road bike resurrector
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302 Posts
My 84 Ciocc came with a Shimano 600.

I had no problems flying up hills in the 42t little ring, and that was on a 21-12 7-speed cassette. But I'm a little past the recreational rider.

Now I upgraded (I use that term loosely) to an 8-speed Shimano Sora 52-39 on the 600 FD. It will work, but watch the trim on that 600. Sometimes the chain can pop off when dropping into that little ring. If memory serves me correct, the 600 crank uses the same BCD as the Sora. 130mm.

Also what cassette is he running? I upgraded to a 9-speed setup and ran a 25-11 on my 600 and the 4-tooth increase helped me off the line and up hills.
 

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road bike resurrector
Joined
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302 Posts
avoid the Megarange, the 600 rear derailleur is good for a max of 27 teeth.

most 600-equipped frames didn't have more than 25t on them.
 
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