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Should I replace the Shimano Altus with a 105?

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Should I replace the Shimano Altus with a 105?

Old 01-22-22, 02:40 PM
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jfouellette
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Should I replace the Shimano Altus with a 105?

I have an old small cage RD 105 RD1055 , 7 speed I think. Can and should I replace the Acera on my 7 speed cassette? The FD is a 105.The shifter is a combo brake shifter. Should I go with a friction shifter and separate brake lever?

Thanks





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Old 01-22-22, 02:57 PM
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70sSanO
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A simple answer is maybe.

Your shifter will work with the RD-1055 and the 105 is a better rear derailleur.

It all comes down to max cog and capacity.

The 105 max cog is 28t with a chain wrap of 28t.

If that fits then, sure.

John
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Old 01-22-22, 03:06 PM
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Bill Kapaun
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Why? I'd take a new Acera over a worn out 105.
Acera is more than adequate for 7 speed. It's above Tourney & Altus.
An Altus shifts the 9 speed on my hybrid adequately.
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Old 01-22-22, 03:56 PM
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jfouellette
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Originally Posted by 70sSanO View Post
A simple answer is maybe.

Your shifter will work with the RD-1055 and the 105 is a better rear derailleur.

It all comes down to max cog and capacity.

The 105 max cog is 28t with a chain wrap of 28t.

If that fits then, sure.

John
My cassette (freehub) is a 11-28 so it should work.

Thanks
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Old 01-22-22, 04:02 PM
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Originally Posted by Bill Kapaun View Post
Why? I'd take a new Acera over a worn out 105.
Acera is more than adequate for 7 speed. It's above Tourney & Altus.
An Altus shifts the 9 speed on my hybrid adequately.
Why? It s winter and -20c outside🥶 I have the time to be home mechanic🚴😀

On the other hand I can service the bearings on the front wheel. It could be easier than working on a derailleur.

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