wait, what is confusing here? The pics are pretty clear what the issue is.

I have a chain that is clearly 1/2" x1/8", evidenced by box and the fact that it fits another chainring that is labeled as 1/8" width.

The chainring in question, is supposedly 1/2" x 1/8", but the confirmed 1/2"x 1/8" chain does not fit it. Does anyone else own this chainring? Can anyone tell me what is going on with it?

I am not trying to confuse anyone, as I am thoroughly confused by this matter. Supposedly all chains/chainrings have 1/2" pitch, okay. So why doesn't my chain fit? This Sugino chainring is making me sad.

everyone fooled you, fool.

I'm going to stand by the post that I made and successively deleted (before ddac made a hissyfit) that the chainring is bunk.

Troubleshooting logic is pretty simple. you've tried a confirmed 1/8" chain on a 1/8" chainring. You're using the same chain on a different chainring.

You have a problem. Either the chain, the chainring, or both are creating it. The chain is not creating a problem.

My _guess_ is either someone ovalized it and the shop you bought it from ripped you off, or it's a manufacturing error. As someone else said, the fact that the bag is labelled "black chainring" is a tip-off. Sugino is usually good with packaging.

Okay, well I am accepting the fact that it is a wonky chainring, I was hoping that someone else has experienced this turmoil and could shed some light. The black labeling is not wrong. I de-anodized it because they didn't have a silver one in stock. Too bad I didn't check that it didn't fit the chain first, because I didn't think that would be a problem in the first place!!

If you say so...I'm sure the interwebs aligned to play a cruel joke on me today. I'm sure you were kidding about that 5/32 chainring or it was a typo, or maybe, just maybe you like to think you know it all and can't admit when you are wrong. Funny, I fix know it alls bikes all day long, I answer their questions all day long and I find that they usually got advice from a know it all in the first place.

Ah, well that solves that. Don't forget that the 130J is for the RD cranks, which hardly get the same level of quality assurance that Sugino's highest-end cranksets get. That said, even companies with fantastic QA (Fender, for instance) often ship duds.

If your shop is reputable (would they check a chainring before returning it? would they try to re-seal it?) then it's really likely just a manufacturing error. Make it into bike part art and just take it as a fairly inexpensive lesson learned.

If you fix bikes all day why didn't you positively contribute to this thread?

One would think that the odds of a chain ring, especially a Sugino, being borked like that is very slim but I guess there is a first time for everything.

I have been turning wrenches for a long time and have never seen that happen.

There are 5/32 and 3/16 bike chains but those are for cargo bikes... a 5/32 chain does look pretty badass on an fg or ss... I know this as we got a small box of these by accident on an order and some folks really liked them.

i admit it! you guilted it out of me!

lol, less than a year is not "a long time"

and thats not a horrible question to ask.

some people, unlike yourself, have friends in real life who cycle to other things and dont want to wear clunky road shoes to do it. who the **** are you anyway?

i've met you in real life. you're nothing special. stop making yourself feel better about being a loser by talking down to people on the internet.

i know to everyone it seems that im doing exactly what im chastising him for, but to everyone who reads this kids crap on a daily basis, im just saying what everyone's thinking. you'd think you'd have learned to stop posting garbage like this after a few years of people telling you its obnoxious and makes you look bad.

i guess some people never learn.


stop being a condescending ****face on the internet. when you're nothing but a whiney kid in real life.

people have been over this with you HERE and other forums and you say you understand but you still post this garbage.

I passed out a schooling on modern chainring/chain compatibility in regards to the OPs problem, you passed out ridiculous misinformation and the went back to edit your post claiming you drank too much beer and were wrong, but now you're right again...very helpful, not confusing in the least...
OP, I highly doubt the chainring is the problem, try having another look tomorrow after you sleep and see if you are just missing something simple, again, we all have our moments.

I just tried it with another 1/8" chain. It doesn't fit.

no one cares, man! this is an e-brawl!

chainring is ****ed, or im at a loss for words if OP isnt really just pullin our legs.

I'm no metallurgist, but it may be possible that the deanodizing you did caused the metal to expand a bit. The chain appears to be close to fitting. So here's my suggestion: Put it on the crank and tension your chain as well as possible. Go ride. Check your chain tension/retension if needed. The chain is steel and harder than the aluminum chainring. I bet it will seat in fine after a couple miles. Don't forget the lube! I say this based on the fact that returning a deanodized chainring probably isn't going to happen. At worst your chain may not last as long as it would under normal circumstances

I wish all threads could be like this thread.

I was looking at the picture of the chain, confirmed to be 1/8 not fitted on the chain ring... the pitch on the ring looks correct and the chain does pass the top of the teeth and amost seats.

It make me think that something in the CNC process went wrong and the chain ring was not milled down sufficiently... it would take a very small error to keep a chain from fitting properly as the clearance is extremely small.

If you don't have calpers your lbs will, and despite your de-anodizing I would not expect to see an issue with making a return and perhaps this would also alert Sugino and your LBS that there may be an issue with an entire production run.

I still say it's a 5/8th chainring. Don't return it, you have the next big thing in fixed gears in your hands. just buy the proper chain and cog, and revel in being an early adopter.

This is not a good idea. Think about how chains are held together.

Sorry, I was trying to go back to some of his BS, but he keeps editing his posts when he figures out how stupid he sounds. I liked that spanking he got from the local...sucks when your internet anonymity is blown...

Big ups on that lockring tool, I'm gonna grind one out ASAP

Post 36 in this thread. I'm just getting sick of these guys confusing the noobs with their new found "bike mechanic skills".

This thread is the tarck of the interweb.

+100

:lol:

You could buy that 530 (5/8) chain at your local motorcycle dealer.