davei1980

This is what my derailleur looks like on my 1x9 drivetrain after sizing the chain using the big/big +2 full links.

I actually went 2.5 links to account for the quick link.

The derailleur looks too stretched out compared to my 1x12 bike

i can post pics of my other bike if you want

Bill Kapaun

Look up the chain wrap capacity for your RDER.
How many teeth difference between smallest & largest cog?
When you have an 11-stupid size cassette, you have a lot of chain to take up.

davei1980

24 tooth difference (12-36t, 9 speed, not too radical at all) max wrap capacity for RD M592 is 45, well within specs

cxwrench

Well within spec when set up properly. Post a photo in the big cog.

79pmooney

You are on the small cog. I would expect to see the derailleur cage about 45 degrees back from what I see. Can you really shift up to the big cog and still have two links to spare? (I trust you are on 1X or are on the largest chainring if double or triple.)

Bill Kapaun

Spec's that would have been useful if included in your 1st post.
You could shorten an inch although no real reason to do so.
Comparing to your 1X12 would require the same kind of info.
RDER mounting geometry may not be exact between the 2 either. One of the reasons Shimano tends to be conservative in their spec's.

davei1980

i am sorry will include next time!!

davei1980

no, won’t shift to the big cog. 1x9 setup.

i sized by wrapping the chain around the big cog and adding 2.5 links. Gonna add back some links until it looks right, then order a new chain so I don’t kill myself lol!

davei1980

Guys I am sorry I am a moron. I just realized I counted backward. I should be able to add back 4 links and be ok.

i have set up several drivetrains and thought I was going nuts.

my daughter was talking my ear off while I was working on it. Serves me right.

squirtdad

fwiw i prefer the small/small sizing approach...but I haven't used it with a 1x set up. I have used it with a vinatage set up 53/39 12-28 and a modern set up 50/34 11--32

Bill Kapaun

I'll assume you had the chain on the largest cog AND the chain ring at the same time.
I prefer to use the term "link sets", since it takes 2 to tango so to speak.
A set is 1".
So, either way, you should have enough "slack".
Are you sure the Low Limit (L) screw doesn't need to be backed out a bit?

I noticed this when looking for your RDER-
"The Deore RD-M592 rear derailleur features Shadow technology which uses a lower profile, making snags on rocks, branches, or other trail debris less of a ..."

davei1980

check out my update. I went backward. I am an idiot. Thanks for the feedback.

cxwrench

If the derailleur is within it's total capacity you're always safe going small/small and having just enough tension so the chain doesn't rub on the pulley cage or itself.

Bill Kapaun

I still don't quite understand what you mean by backwards.
In any case, if you ADD links, DO NOT use the old connecting pin.
Use quick links or a proper replacement pin.
I forgot once and turned a perfectly good RDER into a pretzel when the chain parted.

davei1980

bill- I mean I SUBTRACTED 2 links instead of adding them, so I came out with a chain which is much to short.

thanks, I know, my plan is to re-rivet, check for correct length, and order a new 9 speed chain that is not re-riveted.

davei1980

I actually didn’t know that. I have always used the large/large plus 2 method.....

rosefarts

So I can't blame you.

I replaced the bearings on some Campy cranks with a 9 month old occupying my attention. The bike seemed to surge on me when pedaling for a couple weeks after that. I finally discovered that I hadn't mounted the cranks 180 from each other.

Kids are great but not always the best mechanic helpers.

Bill Kapaun

IF you still have the piece of chain you cut off, a couple Quik Links would be cheaper. I think I bought a bag of 10 far cheaper than individuals. I have two 9 speed bikes though.
It still doesn't hurt to have a spare chain.

Darth Lefty 

The small-small idea works great for full suspension bikes because you can do it with the suspension at full extension rather than taking the air out, and it leaves you with enough links to do the full rated capacity of the RD. If you are trying to get more than the full rated capacity with a triple you might be slack in small-small and it’s not so great.

davei1980

correct you are!

however, RadomBikeParts.com has 9 speed
FSA brand chains for less than $9 with discount code. Delivered.

Now if it were my $40 12 speed chain, that’s a different story but for $9 Ill start over and size a new chain. 😉

davei1980

oh no! And yes, they are sometimes counterproductive. But if my dad didn’t allow me to pal around with him in the garage, I would be a pretty useless adult.

I feel bad too. I have been working from home since March. My youngest daughter is like my shadow, but she knows I am off limits all week. She can see me, but knows not to talk to me. It’s almost harder for her than me being in the office all day. On the weekends we get to catch up 😊

not a bad deal if it only cost me a $9 chain.

davei1980

Here it is after adding the proper number of links back (or linksets, since this is not 1/2 link chain &#128521

When my new chain comes I may cut it even longer by a link or 2

cxwrench

What does it look like in the big cog?

davei1980

Hi - Great question; I can snap a pic if you want but I have this one on the "larger" end of the cassette.

To answer your question, it looks really good, pretty far from being 'horizontal' if that makes sense.

cxwrench

If you are indeed 'far' from horizontal then you're ok. I still think you could go longer and it would make things smoother on the larger cogs. It really doesn't matter what it looks like in the small cog as long as you have some tension on the chain. This (the large cog) is the important thing to see.