Gates CDN S150 left crank arm broke

Hey. So I somehow managed to break off the left arm of my Gates CDN S150 crankset. Thought it won't be a biggie to find a spare, but it seems that no one sells them separately and it's quite hard to find a decent substitute. The arm itself is 170mm and has no curve to it, so completely flat when laid flat. Almost all spares I can find on ebay have some sort of profile which is probably not ideal? I know it's not the most popular drivetrain in the world, but maybe someone has dealt with this or just has a suggestion? I found a few that are mostly flat, among them is a Compagnolo one that looks alright, but then read that it might not fit properly.

I'm looking at these:
https://www.ebay.co.uk/itm/Sunrace-CAM500L-Left-Hand-Crank-Black-170mm-for-CKSUN1-5/233262465950?hash=item364f86c39e:g:x3gAAOSw1pZdHSEq

https://www.ebay.co.uk/itm/New-Bicycle-Bike-Left-Hand-Steel-Crank-Arm-170mm-in-Black-Silver-For-MTB-Hybrid/263528024837?var=562559879690&hash=item3d5b7e8b05:g:i2gAAOSwnOVamQy2

https://www.ebay.co.uk/itm/Campagnolo-Mirage-170mm-Left-hand-Crank-Arm-FC-MIB901-RRP-34-99/163501349999

2 Attachments

Apparently Gates is using J.I.S. type BBs.

1 Attachment

Given that one arm snapped I would

1. Let Gates know

2. Replace the drive side with something less prone to catastrophic failure

:)

Hah. Letting them know might be a good idea. Not sure if there's anything better to replace it with though, maybe only CDX.

It’s just a square taper crank. Probably 130bcd.

Replace it with anything you like.