BB91 and 2,5mm spacer

Discuss light weight issues concerning mountain bikes & parts.

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rainerhq
Posts: 658
Joined: Wed Dec 15, 2010 10:32 am
Location: Estonia

by rainerhq

Frame is Scott Scale 30 and its bb shell is 89,5mm wide. Shimano teh doc syas that with this width I have to use 2,5mm spacer between bb cup and frame. I removed the old bb and there wasn´t this spacer. Do I have to use it with new bb? Everything worked fine exept left bearing got stuck(rusty).
"Nothing compares to the simple pleasure of a bike ride"
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Spark 900 RC

WinSuits
Posts: 46
Joined: Mon Mar 21, 2011 1:15 pm

by WinSuits

rainerhq wrote:Frame is Scott Scale 30 and its bb shell is 89,5mm wide. Shimano teh doc syas that with this width I have to use 2,5mm spacer between bb cup and frame. I removed the old bb and there wasn´t this spacer. Do I have to use it with new bb? Everything worked fine exept left bearing got stuck(rusty).



If your old crankset was the same make and model, then you probably do not need the spacer b/c you would have noticed difficulty while shifting. Therefore, if your Shimano crankset and BB are different, then you should consult the Scott manual.

by Weenie


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rainerhq
Posts: 658
Joined: Wed Dec 15, 2010 10:32 am
Location: Estonia

by rainerhq

I only replaced the BB and did not put this spacer. Just don´t understand, why Shima says it should be there.
"Nothing compares to the simple pleasure of a bike ride"
Jamis Renegade Expert
Spark 900 RC

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