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12spd XT rear mech ...
 

12spd XT rear mech and B tension adjustment

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I've just got a new bike with XT 12spd. 10-51 cassette, first time I've had one that big. I must say I find it quite a clunky shift compared to what I've had before. Is that normal? Is SRAM or xtr any better?


 
Posted : 10/05/2023 10:31 pm
Posts: 265
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I’ve just got a new bike with XT 12spd. 10-51 cassette, first time I’ve had one that big. I must say I find it quite a clunky shift compared to what I’ve had before. Is that normal? Is SRAM or xtr any better?

I've got Deore 12 speed 10-51 on two bikes and it's super smooth but everything has to be bang on, chain length, B-screw, cable routed the correct way, chain is directional. Check your b-screw gap between cassette and derailleur, on one of my bikes, from Go Outdoors, it was way off, shifting was poor and noisy, adjusted to the right gap and it's really smooth and quiet.


 
Posted : 10/05/2023 11:08 pm
Posts: 517
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So a quick update. I purchased a new mech hanger from Windwave . I can now align the rear mech correctly using the B tension screw. Once fitted, I checked the high /low stops and index the gears. It now shifts sweetly in both direction. So, thanks guys for all your input.


 
Posted : 16/05/2023 7:30 pm
joebristol, Gilles, rootes1 and 2 people reacted
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Glad you've got it sorted.


 
Posted : 16/05/2023 7:59 pm
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@jimr80 Top job! Glad all working


 
Posted : 16/05/2023 9:19 pm
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Nice One Cyril


 
Posted : 16/05/2023 9:59 pm
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Glad I found this, just had the same issue. Both the original hanger and replacement looked identical but now I can get the B tension correct. Strange that the bike was supplied with the wrong hanger with 12 speed kit..


 
Posted : 17/09/2024 2:19 pm
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