Quick rear mech question

Jeremy Collins said:

Hi all,

Will I be OK if I fit an 8-speed Acera derailleur to a
bike with a 7-speed cassette and 7-speed shifters (all
Shimano)?

Yes. I put a new 9 speed Deore rear derailleur on a bike with 1991 7
speed DX hub and 7 speed bar end shifters from the same period. All
Shimano. Shimano 7 speed cassette from a few years ago.

Quoted message said:

Jeremy Collins said:

Hi all,

Will I be OK if I fit an 8-speed Acera derailleur to a
bike with a 7-speed cassette and 7-speed shifters (all
Shimano)?

Yes. I put a new 9 speed Deore rear derailleur on a bike with 1991 7
speed DX hub and 7 speed bar end shifters from the same period. All
Shimano. Shimano 7 speed cassette from a few years ago.

Great, thanks for the info.

--
jc

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Jeremy Collins said:

Will I be OK if I fit an 8-speed Acera derailleur to a
bike with a 7-speed cassette and 7-speed shifters (all
Shimano)?

This will be just tickery boo.

When derailers are indicated as n-speed, this is marketing talk, not
technical talk.

Sheldon "Quick Rear Mech Answer" Brown
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Sheldon Brown said:

Jeremy Collins said:

Will I be OK if I fit an 8-speed Acera derailleur to a
bike with a 7-speed cassette and 7-speed shifters (all
Shimano)?

This will be just tickery boo.

When derailers are indicated as n-speed, this is marketing talk, not

Well, there's a lesson worth learning! I'll keep that in mind
when shopping for bargain bits on eBay!

--
jc

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