Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Thu Oct 19, 2017 3:07 am

All times are UTC+01:00





Post new topic  Reply to topic  [ 11 posts ] 
Author Message
PostPosted: Sat May 06, 2017 10:23 am 
Offline

Joined: Tue Mar 22, 2016 1:52 pm
Posts: 47
Bike has standard BSA68 support, and I want to ask about proper support for cranks with 30[mm] axle like Rotor 3D+ and FSA K-Force Light BB386EVO.

I want to buy supports from c-bear:

https://www.c-bear.com/en/products/bott ... a-bsa-only

https://www.c-bear.com/en/products/bsa-rotor-30mm

What can You tell about them? Generally is worth going for 30[mm] crank for BSA68? Or should go for smaller axle?
What can You tell about bearings durability? Should I looking for any problems with those kind of support and cranks?


Top
   
Posted: Sat May 06, 2017 10:23 am 


Top
   
 
PostPosted: Sat May 06, 2017 10:41 am 
Offline

Joined: Sat May 15, 2010 2:01 pm
Posts: 244
If i understand the question correctly you want to know about using a bb30 crankset (with 30mm axle) on a frame designed for bsa68(English 68mm designed for a 24mm axle) right?

The bottom bracket (the hole) in the frame with the bsa68 is a smaller diameter than the hole in a frame that uses bb30. You can find bottom brackets that will fit a bsa68 frame and let you use the larger axle diameter of the bb30 cranks but this means the bearing have to be smaller (thinner) to allow for both the smaller hole in the frame and the larger crank axle.

I emailed Enduro (bearings) about this a few years ago and they said that, while they do sell the necessary bottom brackets to make it work, If is once I was buying a new crank I would be better off just buying the 24mm version and using a normal English threaded bottom bracket as the bearing would be larger and would last longer.

So I've never actually tried it myself. Makes sense that the smaller bearing would wear considerably faster. Hopefully others with first hand experience can offer more advice.


Sent from my iPhone using Tapatalk


Top
   
PostPosted: Sat May 06, 2017 10:57 am 
Offline

Joined: Sun Jan 05, 2014 11:04 pm
Posts: 170
Location: Denmark
I use a praxis chainset, on a bb86 frame that I use for foul wheather, and that works just perfect, it has lasted pretty long and has seen a lot of rain.


Top
   
PostPosted: Sat May 06, 2017 11:05 am 
Offline

Joined: Tue Mar 22, 2016 1:52 pm
Posts: 47
I know that in the cups bearings has larger inner diameter , and in all are thinnner that standard for 24mm axle, or sram gxp.
what i wanted to know, do I need anticipated more problems with this kind of bearings, support, than standard 24mm.

Yes crankset with 30[mm] axle for BSA68 english threaded


Top
   
PostPosted: Sat May 06, 2017 11:20 am 
Offline
User avatar

Joined: Fri Dec 11, 2009 10:38 pm
Posts: 1848
Location: Welland, Ontario
since the bearings are external to the frame there is no need for them to be smaller than say a shimano hollowtech. in fact they are simply a larger version. why should there be a problem? The bearings can be as big as necessary.

Image

Image

_________________
There's sometimes a buggy.
How many drivers does a buggy have?

One.

So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.

http://www.youtube.com/watch?v=GekiIMh4ZkM


Top
   
PostPosted: Sat May 06, 2017 1:39 pm 
Offline

Joined: Wed Sep 12, 2012 9:00 pm
Posts: 550
Location: Az USA
I have an older 2011 Cervelo S3 which is BSA, before they moved to BBRight bottom bracket, and I currently have a wheels mfg BSA30 bottom bracket with a Rotor 3D+ crank installed with over 10k miles on the set up without issue.
There are a few different manufactures of BSA30 bottom brackets, some of the bearing cups are slightly thinner but they typically came with thin spacers to adjust any lateral play.


Top
   
PostPosted: Sat May 06, 2017 3:55 pm 
Offline

Joined: Tue Mar 22, 2016 1:52 pm
Posts: 47
Okay, so do not need worry , and can take cranksets with 30[mm] axle..


Top
   
PostPosted: Sun May 07, 2017 9:37 am 
Offline
User avatar

Joined: Wed Apr 25, 2007 10:23 am
Posts: 1260
Location: Pack filler
Basically you'll need a "long length" version ie like the 3D+ or 386 evo.
A true BB30 will not be long enough.

_________________
Official cafe stop tester


Top
   
PostPosted: Sun May 07, 2017 10:15 am 
Offline

Joined: Tue Mar 22, 2016 1:52 pm
Posts: 47
Quote:
Basically you'll need a "long length" version ie like the 3D+ or 386 evo.
A true BB30 will not be long enough.


and I wrote:

Quote:
Bike has standard BSA68 support, and I want to ask about proper support for cranks with 30[mm] axle like Rotor 3D+ and FSA K-Force Light BB386EVO.


Top
   
PostPosted: Sun May 07, 2017 12:18 pm 
Offline

Joined: Sun Mar 22, 2015 1:52 pm
Posts: 42
jekyll man wrote:
Basically you'll need a "long length" version ie like the 3D+ or 386 evo.
A true BB30 will not be long enough.


Correct. Quarq cranksets will also work (aside from Red) as they all have long BB30 spindles. If there's a threaded, removable adjuster on the cranksets, it will work with BSA30 cups


Top
   
PostPosted: Sun May 07, 2017 1:13 pm 
Offline
User avatar

Joined: Fri Dec 11, 2009 10:38 pm
Posts: 1848
Location: Welland, Ontario
Quote:
If there's a threaded, removable adjuster on the cranksets, it will work with BSA30 cups


No. Those spindles are BB30 lengthened by about 5mm for the adjustable spacer.

BB386 evo spindles are substantially longer.

_________________
There's sometimes a buggy.
How many drivers does a buggy have?

One.

So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.

http://www.youtube.com/watch?v=GekiIMh4ZkM


Top
   
Posted: Sun May 07, 2017 1:13 pm 


Top
   
 
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 11 posts ] 

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Mag 150 with Carbon Axle?

in Road

whydobearsxplod

5

367

Fri Sep 29, 2017 11:30 am

ms6073 View the latest post

There are no new unread posts for this topic. Rim brake thru-axle frames/bikes ?

in Road

ooo

3

230

Wed Aug 23, 2017 4:45 pm

FIJIGabe View the latest post

There are no new unread posts for this topic. 30mm Axle / BB Spacer with < 0.5mm height?

in Road

jbattermann

4

223

Tue Aug 08, 2017 6:36 am

sungod View the latest post

There are no new unread posts for this topic. Crank Bearing Puller for SRM Campagnolo Crank

in Road

mrgray

14

957

Tue Apr 04, 2017 9:37 am

mrgray View the latest post

There are no new unread posts for this topic. Crank arm size

in Road

WhyZ

5

717

Sat Feb 18, 2017 10:20 am

Kayrehn View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: Drpoomanchu, Google Adsense [Bot], jcjordan, JeffK and 44 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Limited