John's IP-057 build - first bike build ever

[cmh]

4 nanometers?  How are you measuring that?   


Sorry, geek 'humor'.  I also get twitchy when people use 'ID' for the inside width on rims.

It could be "inner dimension", but I know what you mean.

[Carbon_Dude]

We have a measurement scope here at work that can measure into the micrometer range, not quite nanometer.  You'd almost need a scanning electron microscope (SEM) for that, which we have used quite often at Georgia Tech.

Our scope is made by Keyance:  http://www.keyence.com/products/microscope/digital-microscope/vhx-5000/index.jsp

Among other things, we use it to measure the thickness of gold plating on electrical contacts.

Sorry for the off topic post.

[JohnnyNT]

I see a fellow scientist here I've used both SEM and TEM, getting down to atomic scale eventually. It will not be needed in the bike industry anytime soon though, I believe.

[Patrick C.]

Well you got your top tube, down tube, nanotube, etc.

[jwilds1]

Measured today. Seat tube is 31.6 dead on, measured in 3 places. Seat post ranged from 30.8 to 31.2, average of 30.9. Problem?

[Carbon_Dude]

I didn't measure my frame, sorry too much trouble to take the seat post out tonight.  However I did measure each of my seat posts:

XMIplay post (3k Gloss finish):  31.5mm

Easton EC90 post (UD Matte Finish): 31.6mm

Based on my two measurements, your post seems to be on the small side.  When I slide either of my seat posts into my seat tube, they don't drop in, I have to work them back and forth to get them to slide up or down.

[JohnnyNT]

Problem, these are 2 different official sizes. One is 31.6 and another 30.9. You'll have to find a 31.6 seatpost.

[jwilds1]

Dammit...  That's what I thought.  So this is the second time Peter hosed me - I didn't say anything about the first time when he missed the chainstay protector.

Off to amazon...

[Rocklobster]

I wouldn't say that he hosed you, since building a frame from the ground up would typically be something you would undertake after having a pretty well rounded understanding of different bike standards.  Not trying to bust your chops, I just don't think it would be quite fair to blame it on the seller though since you did not buy the post from him to go with the frame (making an assumption on that one).  Just a lesson to learn for your next build!

[jwilds1]

No, I got hosed.  Both were ordered from him.

Order was IP-057 and IP-SP5 seatpost.  057 is a 31.6mm frame, SP5 is a 31.6mm post.

There is no identification on the post indicating part number or diameter.  They grabbed the wrong post and threw it in the box, and forgot to throw in the chainstay protector.

When I told him they missed the protector he asked for more shipping.  I said forget about it.

I'm not complaining, just annoyed.  Cost of doing business, I guess...

[Rocklobster]

well then I certainly agree with you, sorry for jumping the gun there.

[Carbon_Dude]

When I ordered my IP-057 I made the point of asking Peter to test fit the seat post into the frame, to ensure the two fit snugly.  I can't be sure they did the test fit but I did receive parts that fit well together.  Assuming they sent you the wrong post to start with and forgot something else, maybe talk to Bert and see if they can send you both for a nominal shipping charge.

[bdub]

Having worked with companies in China before and then working with Peter, I have learned you really have to be very very specific with what you want. When I placed my order I made sure to tell them EXACTLY what I wanted including specifications for the seat post etc. Then I made them put it in an invoice as well. I think a lot of people feel like companies in China are really trying to screw them over but their culture is just so different. Combine that with the language issues and things can really get screwed up fast.

[MTB2223]

Having worked with companies in China before and then working with Peter, I have learned you really have to be very very specific with what you want. When I placed my order I made sure to tell them EXACTLY what I wanted including specifications for the seat post etc. Then I made them put it in an invoice as well. I think a lot of people feel like companies in China are really trying to screw them over but their culture is just so different. Combine that with the language issues and things can really get screwed up fast.

nevertheless it could go wrong.
They send me the wrong wheelset. I asked for red hubs and red nipples, but they sent me black. Got it all in my email. But it was an hassle to get it right.

[jwilds1]

Like I said, I've just attributed it to the cost of doing business. So its an extra $40 to buy another post. It's still way cheaper than anything else I could have bought.

Rant over. New seat post is on its way, and I'm digging into the headset tomorrow.