FSA crankset connundrum BB30A?

[BLD 25]

Hey, I picked up an unused FSA SLK crankset from eBay for my EVO and I was surprised it didn't fit:
http://i9.photobucket.com/albums/a83/Bdavis16/Mobile%20Uploads/IMG_20170204_134646707_zpsilc2ghmq.jpg (http://s9.photobucket.com/user/Bdavis16/media/Mobile%20Uploads/IMG_20170204_134646707_zpsilc2ghmq.jpg.html)

It had a few mm of space and it wouldn't tighten. I compared it to the FSA gossamer crank that came off of it:
http://i9.photobucket.com/albums/a83/Bdavis16/Mobile%20Uploads/IMG_20170204_134842083_zpsslhzbymt.jpg (http://s9.photobucket.com/user/Bdavis16/media/Mobile%20Uploads/IMG_20170204_134842083_zpsslhzbymt.jpg.html)

Any thoughts? It is labeled as BB30, so it shouldn't be 386, but could it be BB30A?

[BLD 25]

http://www.bikewagon.com/fsa-sl-k-light-compact-carbon-road-crankset-50-34t-172-5mm-red

Looks like this! Crazy there is no BB30A label on there. Could I buy a spacer?

[kramnnim]

The spindle is the same diameter, but is longer? Yes, you can add spacers to make it work.

[BLD 25]

Would that change my q angle?

[kramnnim]

You would need to put spacers on both sides, and adjust to get the correct chainline. Q factor will probably be the same...the old crank arms probably have more of an offset to them. Like this image?

https://www.bikerumor.com/wp-content/uploads/2011/12/FSA-SLK-Light-Pressfit-BB30-BB386EVO-comparison10.jpg

[kramnnim]

Oh...if the new cranks are BB30a, maybe you only need spacers on one side. I'm not sure if there are three versions of those cranks... BB30, BB30a, and BB386 EVO? Or do they use the BB386 EVO cranks for BB30a?

[ahumblecycler]

I installed a FSA Gossamer BB30A crank (spindle length is approximately 73mm) in my SuperX by installing standard SRAM 2.5mm spacers that comes in the BB30 assembly, and I have had zero issues for crank. I cannot speak towards chainline though as it is a 1x/11x setup.

I got my spacers from a local shop (shops typically have a surplus since more times than not the BB is for a road bike). I may have an extra set in my parts bin - I'll check and get back with you.

[BLD 25]

I installed a FSA Gossamer BB30A crank (spindle length is approximately 73mm) in my SuperX by installing standard SRAM 2.5mm spacers that comes in the BB30 assembly, and I have had zero issues for crank. I cannot speak towards chainline though as it is a 1x/11x setup.

I got my spacers from a local shop (shops typically have a surplus since more times than not the BB is for a road bike). I may have an extra set in my parts bin - I'll check and get back with you.

thanks, I have a couple of those. Think they should probably both be on the NDS? I am not sure I am good enough to notice my cranks being 5mm to the left. I am 6' and 195lbs and I doubt i am going to notice that. :) I am looking at CAAD12s, so I might hang on to this guy just in case I go BB30A someday.

[BLD 25]

anyone else have any thoughts on the spacers?

[jbay]

anyone else have any thoughts on the spacers?I'm not familiar with this crank, bu this is what I would do. Simply insert the crank into the bottom bracket without spacers and measure the chainline. If it is 43.5mm, the spacers go between the left hand crank and the bottom bracket. If the chainline is less than the target number, add the appropriate spacer or spacers between the drive crank and the bottom bracket.

-- John

[BLD 25]

Good info. It appears to be a standard BB30 crankset but with a little longer spindle. I bet i might be able to use two or three of the little washer spacers on one side, and then the solid aluminum 2.5mm spacers(2) on the NDS, but I wasn't sure if that would affect the stiffness. Maybe it would be down slightly because of a longer spindle, but shorter BB width, but not like I am in the tour or anything though!

[beeatnik]

It appears to be a standard BB30 crankset but with a little longer spindle.

That means it's BB386. Which means it's designed for 86.5mm width Press Fit systems. Which means it has a 30mm spindle. Which means the bearings have a 30mm ID (42mm Outside Diameter). Which means the bearings are in cups with a 46mm (OD). Which means the cups press into the bottom bracket shell.

These 386EVO 30mm spindle cranks are compatible with BB30/PF30 and PF30a/BB30a.

"Standard" or native BB30 cranks are designed for BBs which are 68mm wide.

"True" or "standard" or native BB30a cranks are designed for 73mm wide BBs.

Here's the gist, while you can use a BB386 cranks on a 68/73mm BB. You can't do the reverse (for obvious reasons).

BB30 (or PF30) gets confusing because cats call anything with a 30mm spindle a BB30 system. But the reality is that there are many bottom brackets which use oversized 30mm bearings (bb30, specialized osbb, cerveleo bb right, rotor's various cups and 386EVO)

[BLD 25]

That means it's BB386. Which means it's designed for 86.5mm width Press Fit systems. Which means it has a 30mm spindle. Which means the bearings have a 30mm ID (42mm Outside Diameter). Which means the bearings are in cups with a 46mm (OD). Which means the cups press into the bottom bracket shell.

These 386EVO 30mm spindle cranks are compatible with BB30/PF30 and PF30a/BB30a.

"Standard" or native BB30 cranks are designed for BBs which are 68mm wide.

"True" or "standard" or native BB30a cranks are designed for 73mm wide BBs.

Here's the gist, while you can use a BB386 cranks on a 68/73mm BB. You can't do the reverse (for obvious reasons).

BB30 (or PF30) gets confusing because cats call anything with a 30mm spindle a BB30 system. But the reality is that there are many bottom brackets which use oversized 30mm bearings (bb30, specialized osbb, cerveleo bb right, rotor's various cups and 386EVO)

I actually believe it is a true BB30A, which is BB30, but 5mm wider. A true 386 is much wider, and this is not. I will try the 5mm spacers on the NDS and see.

[beeatnik]

Ah, just clicked on your link. Good ole FSA.

In any case, manufacturers aren't consistent in their labeling. SRAM produces 386 cranks which they list as BB30 (wide).

https://www.universalcycles.com/shopping/product_details.php?id=46739&category=2978

Native BB30 cranks would not require as many spacers and be nearly flush with the edge of the BB:
https://c1.staticflickr.com/1/537/32372596460_fd3cf078ee_h.jpg

https://c1.staticflickr.com/1/595/31909538684_5957811158_h.jpg

And as mentioned above, while the spindle is wider, q factor remains about the same

https://c1.staticflickr.com/1/572/32629060331_4163622dc0_h.jpg

edit: so as it states in the product description, the cranks may not fit as there may be issues w/ properly loading the bearings. do a search on weight weenies. i'm facing the opposite, um, dilemma, trying to swap my hollowgrams from a PF30 frame to BB30a. it gets somewhat complicated as a different spindle, more spacers/shields and a change in wave washer are required....

[BLD 25]

well, I think i disagree. FSA gives different colors to their spindles; silver for BB30, and gold for BB386. That makes me think that this one, being black, has a different designation. Also, 386 is 86mm wide, while mine is only slightly longer, and my arms are more curved instead of straight as on the BB386.

it also looks exactly like this in the link:
http://www.bikewagon.com/fsa-sl-k-light-compact-carbon-road-crankset-50-34t-172-5mm-red

I am convinced it is bb30A, just unsure on the spacers, but I might give it a try. Thanks, everyone!

[beeatnik]

well, I think i disagree. FSA gives different colors to their spindles; silver for BB30, and gold for BB386. That makes me think that this one, being black, has a different designation. Also, 386 is 86mm wide, while mine is only slightly longer, and my arms are more curved instead of straight as on the BB386.

it also looks exactly like this in the link:
http://www.bikewagon.com/fsa-sl-k-light-compact-carbon-road-crankset-50-34t-172-5mm-red

I am convinced it is bb30A, just unsure on the spacers, but I might give it a try. Thanks, everyone!


yep, BB30a, amended my previous post.

[Ralph]

Have you U tubed it?

[ahumblecycler]

I did 2.5mm per side ... again though I am running 1x11 setup

[BLD 25]

An update......

I have been using this crank for a few months. It is definitely a BB30A, and I am using it on my Supersix EVO which is BB30. I placed the two 2.5mm spacers and wavy washer on the NDS.

Next question if anyone knows....would I be able to use a BB30 stages arm on the NDS? Is this a question for FSA or stages?