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Difficulty finding replacement for BB-UN300 D-NL

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Difficulty finding replacement for BB-UN300 D-NL

Old 02-28-24, 08:15 PM
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Difficulty finding replacement for BB-UN300 D-NL

Hello everyone,

I am new to working on my own bike so please forgive any ignorance on my part.

i am trying to find a replacement for my bottom bracket for my bianchi Torino hybrid bike.

the BB that I removed is a BB-UN300 D-NL

My bottom bracket shell is 68mm and the spindle is 123mm (I guess that means it is 122.5mm?)

he drive side of the spindle is longer than the non drive side.

does anyone know if this bottom bracket can be purchased anywhere or does anyone know of any compatible replacements?

most of the ones I see online are LL123 and D-NL

thanks in advance to anyone who can give me
some direction.
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Old 02-28-24, 09:10 PM
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You should be good- From Shimano 2013-14

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Old 02-28-24, 09:25 PM
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https://www.jensonusa.com/Shimano-BB...ttom-Bracket-8

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Old 02-28-24, 09:39 PM
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Originally Posted by Jamestyle
Hello everyone,

I am new to working on my own bike so please forgive any ignorance on my part.

i am trying to find a replacement for my bottom bracket for my bianchi Torino hybrid bike.

the BB that I removed is a BB-UN300 D-NL

My bottom bracket shell is 68mm and the spindle is 123mm (I guess that means it is 122.5mm?)

he drive side of the spindle is longer than the non drive side.

does anyone know if this bottom bracket can be purchased anywhere or does anyone know of any compatible replacements?

most of the ones I see online are LL123 and D-NL

thanks in advance to anyone who can give me
some direction.
You should be able to find this, it's still a current model from Shimano.

Just get the same model, UN300 in D-NL length with the correct BB shell width (68 or 73). Not sure of the dimensions of the LL123.

Avoid the model with E or K in the model #, those are designed for E bracket mounted front derailleur and chain case frames.

Other brand of bottom brackets of the same length would also be very similar in left &right lengths. A mm or 2 won't matter, unless your frame has clearance issues with the chainring or chainstay (very uncommon if the current BB is 'stock' on the bike.
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Old 02-28-24, 09:40 PM
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Might as well buy a Made in Japan one if you are going through the trouble of replacing the BB.

Tange LN-3922 Bottom Bracket | (benscycle.com)
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Old 02-29-24, 05:43 AM
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You all have been very helpful, thank you! Just ordered the correct one.
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