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Discussion Starter · #1 ·
Hi guys,
I was hoping to be sharing build pics by now but have run into some difficulties.
I purchased a Deedar frame at the start of January, it was faulty.
For the last 6 weeks I have been trying to get them to send me a replacement, no luck.
This is the kind of response I receive...

I have taken all of the images and e-mail correspondence and had a VERY careful and thorough look into this.

This is a BSA threaded bottom bracket for BSA threaded cups. On a BSA threaded bike the drive side (Right) is threaded in a clockwise direction so the cup has to be tightened in a clockwise direction to fit. On the other hand the non-drive side (Left) is threaded in an anti-clockwise direction so the cup has to be tightened in an anti-clockwise direction. In summary the cups are always tightened in the same direction the wheels turn in when in a forward motion. This is to stop the cups from loosening when pedaling.

The photos that you have sent showing the threads do appear to be correctly milled.

Your last video is very interesting as you are inserting the cup into the drive side (Right) and turning it in a clockwise direction as shown by the tighten arrow which is correct. However there is a 'L' stamp saying that this is a left hand cup.

I do believe that the frame's bottom bracket shell is threaded properly and has not been cross threaded allowing installation both ways. I would recommend checking the bottom bracket cup which may be mis labelled.

Kind Regards,


As you can imagine I'm less than thrilled with my purchase experience.

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Big Paws on a Puppy!!
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356 Posts
Ran into the same problem on an Inbred 29er frame. No matter what I tried I could not get the BB to install/seat correctly. I ended up taking the frame into my LBS and had then clean/chase the treads. After that the install went silky smooth.

My best guess is there was paint built up in the treads and that caused the problem.
 

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Pipe Dreamer
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6,617 Posts
This is like one of those mind puzzles and it's driving me nuts! If a train is going south a 60mph, and the wind is blowing north at 40mph...

If the drive side threads in clockwise, then the cup in the picture has been mislabeled, and there should be no way to install it on the non-drive side. And if the other cup is labeled "R", and threads (anti-clockwise) into the left side, it just confirms the mislabeling, and it's not On-One's problem.

Perhaps both cups have the same threading, but one has an "L", and the other one has an "R". Still not On-One's problem.

Then there's this: shouldn't the arrow on the non-drive side cup be pointing the other direction, pointing anti-clockwise?
 

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RAKC Industries
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OK have to edit:

OP IS 100% CORRECT.

I'm staring at 2 bikes using Shimano bottom brackets just like his.

His threaded BB housing is in backwards. His BB is correctly labeled.

However it IS POSSIBLE that this is intentional for the reason they say. But their idea is flawed. If you take a bearing and spin the inner the outer will actually want to turn the opposite direction (hard to do I know but that's how this is done in most mechanical instances). Thus while pedaling the cup would only "tighten" if threading was set for the opposite direction.

Won't hurt anything and like I said, may be intentional design. BB has loctite, if it torqued it won't come loose regardless.

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Discussion Starter · #10 ·
If you take the cup in the picture above and rotate it 180 degrees, move it to the NDS, wouldn't the tighten arrow be pointing in the wrong direction?
Nope, both sides are supposed to tighten the opposite way to the crank movement when pedalling.
On this particular frame both tighten the same direction as the crank movement.
 

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Pipe Dreamer
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Nope, both sides are supposed to tighten the opposite way to the crank movement when pedalling.
On this particular frame both tighten the same direction as the crank movement.
Then the BB truly is welded in backwards. I'm still kinda baffled about the labeling. I did some photoshopping to show how I see it. I flipped the picture horizontally so the "L" cup is on the left side and the arrow points the correct direction (up, anti-clockwise), but that's not how it'd be. The right side shows the Tighten, L, and arrow pointing the direction it would go. Even if the threading of the BB shell was correct, wouldn't the arrow need to point up instead of down?

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Pipe Dreamer
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Nope, both sides are supposed to tighten the opposite way to the crank movement when pedalling.
On this particular frame both tighten the same direction as the crank movement.
I guess I didn't fully comprehend this earlier, I was thinking they tighten in the same direction as crank movement. You'd think I would know after wrenching on bikes for as long as I have, lol! I still get confused with BB and pedal type stuff.

A simple search and I could have figured that out earlier. From Park Tool:

 
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