High normal refers to “regular” rear derailleurs, for which the default position with no spring tension is in the highest gear. Hence, high normal. Low normal (what Shimano called Rapid Rise) is the opposite: the default derailleur position without spring tension is in the lowest (largest) gear. 

This is why Grant/Riv are calling their low normal derailleur in development the “OM,” for opposite movement, sort of rejecting the notion that high normal is the absolute normal. The different movements are just opposite each other. 



On Mar 18, 2024, at 11:02 PM, John Rinker <jwrin...@gmail.com> wrote:

Just curious: What does 'high normal' mean in the derailleur world?

Cheers, John



On Monday, March 18, 2024 at 3:44:45 PM UTC-7 ian m wrote:
I believe the M952 is high normal, but you can't go wrong with the M951

On Monday, March 18, 2024 at 1:01:39 PM UTC-4 chintan...@gmail.com wrote:
I'm looking to try a RR derailleur and want something under 50-60 ideally.

Which ones would you recommend? Were there are early RR derailleurs that one should stay from or budget ones that are a good value? Were there differences in pulley sizes - so would be better to get one where replacements are available?

I'm currently seeing an LX m580, xt M760, an xtr m951 and xtr m952 around that range on ebay in different used conditions...and then the prices rise very quickly! 

Thanks a lot for guiding :)
Chintan

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