Yeti 575 Carbon states frame has 30.9mm seat tube will a 31.6mm crank brothers

Joplin R adjustable seat post fit?

 

No. You would need a 30.9 seat post, the 31.6 would be to big.

 

Yes, but you will need a really big hammer and the frame will probably be destroyed.

 

Alright, everybody together now "31.6>30.9."

 

Don't be an assklown. The size differences are obvious but sometimes manufacturer specs are funny in that although there are size differences, parts are sometimes compatible. I've seen it many times.

 

There are no stupid questions.
Answer:
No, if the seatpost is bigger than the seat tube it will not fit. If the seatpost is smaller than the seat tube, then you could buy shims to make it fit.

 

I don't think he's trying to be an ass. This is what you're trying to do.

 

got a link to where they supposedly state this?

 

Reading a sentence split between subject and body hurts my head. To clarify your original post, you mean that the seatpost size is 30.9. The seat tube size is 34.9. Not to be an ""assklown," but if you knew what the sizes represent, you would intuitively know that the inner diameter of the seat tube for the seat post should have tight manufacturing tolerances. Imagine a frame where your seat tube compressing 0.8mm in diameter. I wouldn't want to ride on that wet noodle of a frame...

Edit: seat tube size is represents the outer diameter of the seat tube. Typically important for clamp-style front derailleurs and seatpost clamps.

 

Chainlove was offering the Crank Brothers Joplin in a 31.6 for $119 and I was unsure about the fitment on my F4 and what I think will be my new bike, Yeti 575 Carbon.

The specs on Yeti's website state the seatpost (I called it seat tube) size is 30.9.

Because there were only 9 left and they were going quickly, I jumped on here and posted the question (yes, not grammatically correct) about fitment.

Although there is a .7mm difference, I needed to be sure about whether or not the Joplin would fit the Yeti and/or the F4.

That's all.

 

Ok no one here is being an ass but 31.6 does NOT equal to 30.6. That means no it will not fit. No main brand manufacture would have .7mm error variance and if they do you don't want it. Yeti is a very respected manufacture so I highly doubt even .1mm would be tolerated in the QC process.

Seriously if it would fit then why the 2 different size? The good old if it doesn't fit then push hard never worked.

 

you could probably buy a lower 30.9 sleeve from crank bros.... (simple to swap the bottom sleeve). BUT, it would probably make more sense to just buy the right part in the first place.

BTW - you dont want a joplin 3....

 

Your Cannondale F4 should use a 27.2mm seatpost.

That being said - how much will you be selling that Joplin for?

 

In my experience with building custom car, quads, etc., a .7mm error is forgivable in some cases so I assumed a .7mm may not be a big deal here in this example.

Thanks.

 

If you are really motivated you could do it like this.

1. Expand the 30.9 seat tube by heating the entire frame to 500 °F.
2. Shrink the 31.6 seat post with liquid nitrogen to a negative -321 °F.
3. Slide the seat post into position. As the temperatures equalize the frame will shrink and the seat post will expand until they are mated (permanently). Also, cross your fingers hoping that the seat tube doesn’t split.

No seat clamp will be necessary and it will never squeak.
:read:

 

I didn't buy it after mfoga said it wouldn't work.
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You guys are getting way too wrapped up in this. It was simply a n00bie question. I didn't expect to get so much chit thrown at me.

It was a very simple "yes" or "no" answer.

 

Dammit. I was hoping you had bought it and were going to have to sell it.

 

As someone who has asked his share of "outrageous" questions, I agree. But the gentle ribbing is all a part of the newbie hazing process :beer:.

To be fair, the question wasn't totally off base. If you were going from 30.9 to 31.6, you could use shims (though no one really recommends it).

 

where can i find this .7mm shim? (.35mm each side)
(.35 millimeters = 0.0137795276 inches)

Just saying that ive never seen that shim available without making it yourself.

 

Coke can!