Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Sat Jun 25, 2016 6:45 pm
Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed ✔ FIXED
- Tapatalk connection is currently broken ✔ FIXED
- Avatars cannot be uploaded ✔ FIXED

Please note that we will soon do some changes in WW board template design in case to get a fully mobile/desktop responsiveness board!
If you find more errors please post it here: http://weightweenies.starbike.com/forum/viewtopic.php?f=7&t=139062


All times are UTC+01:00





Post new topic  Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Thu Aug 16, 2012 10:32 pm 
Offline

Joined: Thu Aug 16, 2012 10:21 pm
Posts: 4
I’ve just bought a SRM powermeter on Ebay. Its a K-Force (Not light) with power control V. I have a SLK (Not light) on my bike which goes with the BB-8000 Megaexo bottom bracket and according to various compatibility tables this also fits the K-force. I use an english bottom bracket with the inscription T1.37. The seller also send me an identical bottom bracket and claimed that it had been fitted with the SRM powermeter. Everything should be fine however it doesn’t fit. The axel/shaft on the right arm is simply too short. The total width of the bottom bracket is 92 mm which is identical to the distance from the right arm to the beginning of the splines on the shaft on the SLK crankset. On the K-force SRM the distance is 90 mm so when tightening the crankbolt it squeezes the bearings and get all tight.

What is wrong here?

Is there an alternative bottom bracket with these dimension or could the SRM be assembled wrongly? There are some torcx between the shaft and the SRM.


Top
   
PostPosted: Fri Aug 17, 2012 7:49 pm 
Offline

Joined: Mon Apr 27, 2009 11:06 pm
Posts: 86
Location: SF Bay Area
You need the BB-8060 bottom bracket to use with the SRM KForce (team issue) Crankset. The SRM used the 'team issue' KForce arms with the removable alloy spider.

From SRM: $45
https://www.srm.de/store_usa/product_in ... d=wjvknzea

A bit cheaper elsewhere if you google it.

I have a spare Non-Drive 172.5mm arm if you happen to need it. I sold my SRM a couple years back.

Enjoy!


Top
   
PostPosted: Sat Aug 18, 2012 10:46 am 
Offline

Joined: Sat Aug 20, 2011 2:09 am
Posts: 44
Yes you need the 8060. You also need two of the blue FSA crushable washers - one per side.


Top
   
PostPosted: Sat Aug 18, 2012 12:51 pm 
Offline

Joined: Thu Aug 16, 2012 10:21 pm
Posts: 4
I think you are right if what I had was a ‘team edition’ but it only states ‘ K-force’ on the crank (see the image). I believe the ‘team edition’ is a newer version. Judging from the image do you think that what I have here is really a ‘team edition’ despite the missing inscription?

Also see the compatibility table.


Attachments:
SRM.jpg
SRM.jpg [ 44.6 KiB | Viewed 1511 times ]
compatibility_chart-v2.jpg
compatibility_chart-v2.jpg [ 82.95 KiB | Viewed 1511 times ]
Top
   
PostPosted: Sat Aug 18, 2012 6:39 pm 
Offline

Joined: Sat Aug 20, 2011 2:09 am
Posts: 44
Looking at your picture it definitely the 8060 that you need. These are the washers http://www.jensonusa.com/FSA-Mega-Exo-Spindle-O-Ring


Top
   
PostPosted: Tue Aug 28, 2012 3:47 pm 
Offline

Joined: Thu Aug 16, 2012 10:21 pm
Posts: 4
Thanks, I've been a bit skeptical but having a BB-8060 at hands now it looks like you guys were right.

The next question now arises. The BB8060 does not have tis internal cylinder of the BB-8000 ( see the image BB-8000 to the left, BB-8060 in the middle, the cylinder from the BB-8000 to the right, which is too long for the BB-8060). I think I heard somewhere that the metal cylinder was required for carbon frames to assure that the frame is not crushed tightening the crank and crank bolts.

Is this a vital component for a carbon frame or should I just be a bit careful when mounting?


Attachments:
bb8060-1.jpg
bb8060-1.jpg [ 12.97 KiB | Viewed 1432 times ]
Top
   
PostPosted: Wed Aug 29, 2012 8:20 am 
Offline
Shop Owner

Joined: Sat Jun 13, 2009 4:02 am
Posts: 1980
Location: NoVA/DC
The extra metal tube has nothing to do with crushing carbon frames. It has to do with not over-preloading the bearings. Older "square spline" fsa cranks just tightened and tightened, the arm would not bottom out on itself. Instead, the arms would sandwich the bearings and the metal tube, all along the inner races. Everything is tight, nothing is pushed sideways.
Later "arc-spline" cranks used a wavy washer between the left arm and the bearing, and the arm would bottom out on itself. Arm is tight to the spindle, bearings are not too squished, side load is controlled by the wavy washer.
So that's a brief history lesson on fsa mega exo systems.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 7 posts ] 

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Which GXP bottom bracket?

in Road

cnyn

8

499

Wed May 11, 2016 6:44 pm

topflightpro View the latest post

There are no new unread posts for this topic. What bottom bracket do I have?

in Road

G6612

3

279

Thu May 05, 2016 8:58 pm

Calnago View the latest post

There are no new unread posts for this topic. bottom bracket tool

in Road

goldielox

11

701

Sat Feb 13, 2016 3:38 pm

BRM View the latest post

There are no new unread posts for this topic. Best BB386 : GXP bottom bracket ?

in Road

stormur

14

623

Mon Jun 13, 2016 4:03 pm

Mr.Gib View the latest post

There are no new unread posts for this topic. Reset Racing BSA bottom bracket

in Road

Stockie

3

617

Thu Jul 16, 2015 1:15 am

tinozee View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: Baidu [Spider], CampagnoloRules, Google [Bot], nherment, Sleepless, Yahoo [Bot] and 17 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:  
Powered by phpBB® Forum Software © phpBB Limited