Which cranks will suit BSA bottom bracket ?

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Thejingerr
Posts: 104
Joined: Sat May 13, 2017 5:18 am

by Thejingerr

Hello

Which cranks will suit BSA bottom bracket ?

As I understand correctly 30mm not suit? And 29mm will. Also 24mm will surely fit.

P.s. frame specialized shiv (they sell it with Shimano 24mm and GXP SRAM 29mm cranks)

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LeDuke
Posts: 2096
Joined: Sun Oct 07, 2012 2:39 am
Location: Front Range, CO

by LeDuke

Plenty of companies make “BSA30” bottom brackets that allow you to use 30mm cranks.

I’m running Hollowgram cranks with a Chris King Threadfit30 bottom bracket on my XC bike.


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MayhemSWE
Posts: 898
Joined: Thu Mar 12, 2015 12:44 pm
Location: Stockholm, Sweden

by MayhemSWE

Pretty much everything should fit (with the correct bottom bracket of course). The notable exception being "true" BB30 cranks, which due to their short spindle will only fit 68 mm wide frames with internal bearings. But pretty much no-one makes those anymore…

CampagYOLO
Posts: 933
Joined: Thu May 06, 2021 3:58 pm

by CampagYOLO

LeDuke wrote:
Tue Aug 13, 2024 11:56 am
Plenty of companies make “BSA30” bottom brackets that allow you to use 30mm cranks.

I’m running Hollowgram cranks with a Chris King Threadfit30 bottom bracket on my XC bike.


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The only issue with some frames and BSA30 is that the larger axles doesn't leave an awful lot of room for the cables/hoses.

satanas
Posts: 473
Joined: Sat Jul 04, 2020 5:45 pm

by satanas

Hollowgram cranks and BSA30 BBs are only going to work on MTBs which use a much longer spindle and wider Q factor. With a road spindle and Q factor there's literally no room for the bearings except inside a BB30 or T47 shell.

Thejingerr
Posts: 104
Joined: Sat May 13, 2017 5:18 am

by Thejingerr

Can you please advice lightweight crankset? Ideally with 110bcd

Maybe is it good idea to buy Chinese Lexon: 375g 170mm. Width 92 mm, diameter 28,99 mm ?

Image

toxin
Posts: 1228
Joined: Tue Apr 18, 2023 5:56 pm

by toxin

The design of these is basically Cybrei, probably comes from the same factory. But because it's sold by Lexon, the qc and such is probably worse.

JMOS
Posts: 303
Joined: Mon Jan 20, 2020 7:57 pm

by JMOS

toxin wrote:
Tue Aug 13, 2024 7:28 pm
The design of these is basically Cybrei, probably comes from the same factory. But because it's sold by Lexon, the qc and such is probably worse.
I bought these recently but haven't installed them yet. Weight is as advertised. Overall finish is good. Clear coat finish on the carbon could probably be a tad better.
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Thejingerr
Posts: 104
Joined: Sat May 13, 2017 5:18 am

by Thejingerr

If I use these Lexon 28.9mm with BSA BB will be the size of the bearings regular (big) size ? or I'll sacrifice the size bearings?

CampagYOLO
Posts: 933
Joined: Thu May 06, 2021 3:58 pm

by CampagYOLO

Thejingerr wrote:
Wed Aug 14, 2024 4:48 am
If I use these Lexon 28.9mm with BSA BB will be the size of the bearings regular (big) size ? or I'll sacrifice the size bearings?
The bearings are outboard on a BSA BB, not inboard. They're not restricted by the BB shell as to how big they can be.

It's really not a concern, use the Enduro one posted above if you're still worried. I've got several BSA30 bikes and never had any issues and if you hold one cup next to a Shimano BSA one you can see it's bigger.

Thejingerr
Posts: 104
Joined: Sat May 13, 2017 5:18 am

by Thejingerr

Please recommend BB for 28.9mm cranks (Enduro pricey, which another better to get?)

CampagYOLO
Posts: 933
Joined: Thu May 06, 2021 3:58 pm

by CampagYOLO

Thejingerr wrote:
Wed Aug 14, 2024 7:56 am
Please recommend BB for 28.9mm cranks (Enduro pricey, which another better to get?)
If budget is a concern then just get the SRAM one

Nickldn
Posts: 2156
Joined: Mon Mar 25, 2019 12:35 am

by Nickldn

I got the Wheels Manufacturing BSA DUB BB for my SL8. Came with the right spacers and seems to work really well.

Don't forget that if you are fitting the BB yourself you'll need the right tool to thread it into the frame. You'll need to budget for that too.
Giant Propel Advanced SL Red Etap 11s Easton EC90 wheels CeramicSpeed BB Zipp SL70 bars 6.5kg

S-Works SL8 Dune White SRAM Red AXS Craft CS5060 wheels Roval Rapide bars 6.6kg

bobones
Posts: 1413
Joined: Mon Aug 12, 2013 11:19 am

by bobones

CampagYOLO wrote:
Wed Aug 14, 2024 9:04 am
Thejingerr wrote:
Wed Aug 14, 2024 7:56 am
Please recommend BB for 28.9mm cranks (Enduro pricey, which another better to get?)
If budget is a concern then just get the SRAM one
I'll second that. I've had the SRAM DUB BSA BB on a wet weather bike for a couple of years and it's still running smoothly.

Thejingerr
Posts: 104
Joined: Sat May 13, 2017 5:18 am

by Thejingerr

Thanks all for reply!

To not create new theme, ask here.
On a second bike I have PF86 BB (and run it with Shimano 24mm) If I want change it to 28.9mm cranks which BB should be used for PF86 and 28.9 axle?

by Weenie


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