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Is there any way to fit Shimano crankset into MID BB bottom bracket please ?

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Is there any way to fit Shimano crankset into MID BB bottom bracket please ?

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flag cipisek
Posted: Jan 15, 2018 at 9:32 Quote
Hi. I have the Norco Ryde 26 2015, which has Mid BB on it. Also I have Shimano Zee 68/73 crankset at home. Is there any way that those Shimano cranks will fit into my Mid BB shell ? Please help, any advices are welcome.
flag Aaronz25RS
Posted: Jan 16, 2018 at 6:43 Quote
https://praxiscycles.com/bottom-brackets/conversion-bb/

Google usually works in 99.995% of cases
flag cmc4130
Posted: Jan 18, 2018 at 8:35 Quote
I don't know the answer to your question. But, I do know that the outer bearing diameter in a Mid bb is 41mm.

https://en.wikipedia.org/wiki/Bottom_bracket



photo
flag cmc4130
Posted: Jan 18, 2018 at 8:54 Quote
Aaronz25RS wrote:
https://praxiscycles.com/bottom-brackets/conversion-bb/

Google usually works in 99.995% of cases

I'm not sure if the Praxis one would actually work? A Midd bb shell has 41mm inner diameter vs BB30 has 42mm inner diameter.

https://praxiscycles.com/product/conv-bb-shimano-mtn/ "This Conversion BB is for installing a Shimano Hollowtech II steel spindle crank in either BB30 or PF30 MTN frame. "


BB30 frame shell inner diameter is 42mm, has two bearing retaining clips and two 6806 bearings pressed directly in the frame.
https://wheelsmfg.com/bb30-vs-pf30
flag cipisek
Posted: Mar 15, 2018 at 11:47 Quote
So....Is there any way or not? I'll likely just stick it with some nice and cheap BMX 165mm cranks. BTW I'm only 170cm tall and 175mm cranks are way OP for me
flag eshumka
Posted: Mar 15, 2019 at 16:09 Quote
Did you ever get these to fit? If not what did you do instead? I bought an older ryde that I am refurbihsing and the cranks it came with are totally rusted. I am looking to go with lighter aluminum set, but bottom brackets are insanely confusing.

Cheers
flag cipisek
Posted: Mar 15, 2019 at 18:40 Quote
Hi, i have Cult Crew BMX 165mm cranks and fit well... From what I have learned there is no way to fit any MTB type cranks with Mid BB.... https://shop.tbb-bike.cz/kliky-cult-crew-black/
Cheers
flag walkingtall76
Posted: Mar 15, 2019 at 19:42 Quote
Shimano zee needs an external BB- your Mid press-fit BB isnt threaded. If you had/have a threaded euro BB on the norco they will work.
flag cipisek
Posted: Mar 15, 2019 at 20:54 Quote
It's still not possible. Norco Ryde has Mid BB, fits ONLY BMX cranks... If you want to put some Shimano cranks it must be all custom with custom machined external cups and only 83mm Shimano cranks, not 68/73.
flag walkingtall76
Posted: Mar 16, 2019 at 7:10 Quote
tulipanek wrote:
It's still not possible. Norco Ryde has Mid BB, fits ONLY BMX cranks... If you want to put some Shimano cranks it must be all custom with custom machined external cups and only 83mm Shimano cranks, not 68/73.


Lol- did you read my post? Thats what i said. If the norco had/has a threaded BB you could put the Zee cranks. It doesn't, it has a press- fit Mid BB.

I'll say it again- if your DJ frame had a euro threaded BB (many do) you could fit your Zee cranks..
flag jpa86
Posted: Jun 4, 2019 at 11:00 Quote
If you have a mid bottom bracket. there are many companies making mid bottom bracket bearings for a 24mm spindle, which shimano cranks use. you just may need to add some spacers to make up for the longer spindle..
flag mich-pee
Posted: Jun 13, 2019 at 13:12 Quote
I have seen a BMXer run carbon MTB cranks on a mid BB, this is what he told me he used:

https://www.raceface.com/products/details/cinch-bb92-bb
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