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Bottom bracket infos

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Old 03-25-24, 01:08 PM
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CrowSeph
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Bottom bracket infos

Hello, my roadbike have a bottom bracket marked as Bb7241. My local shop sold me the bb7141a.
I know that is specific for mountain bike, but would be compatible for my roadbike?
What's the difference between the tho models?
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Old 03-25-24, 01:53 PM
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I'm ignorant of the "new" stuff, but it appears the shell width (at least) is different.
https://bike.shimano.com/en-EU/produ...-BB71-41A.html
https://bike.shimano.com/en-EU/produ...-BB72-41B.html
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Old 03-25-24, 01:56 PM
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Originally Posted by Bill Kapaun
I'm ignorant of the "new" stuff, but it appears the shell width (at least) is different.
https://bike.shimano.com/en-EU/produ...-BB71-41A.html
https://bike.shimano.com/en-EU/produ...-BB72-41B.html
Oh I forgot to mention, the seller said to use the old middle part of the bb (I think is called sleeve or smt) and add just the cups.
But I want to be 100% sure
I had to take this bb because I'll be free from work for around 8 days and this was the only option available... In a few shops
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Old 03-25-24, 05:41 PM
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...if you are keeping the same crank, it comes with the spindle as part of the crank.
All the sleeve in the middle does is space the bearing assemblies closer or farther apart.

So you should be fine, if you're replacing the crank and bearings on the same bicycle.
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