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SRAM X4 rear derailleur limit screws

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SRAM X4 rear derailleur limit screws

Old 08-06-23, 10:01 PM
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The freewheel is a Shimano MF-TZ31 14-34. How old would that make it?
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Old 08-06-23, 10:33 PM
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Originally Posted by BikingViking793
SRAM says it's for 7/8 speed. Seriously if it won't work in this application SRAM needs new engineers. I'll have to bring the bike in to the shop where I bought the derailleur and see what they can say about it. Seems like a really bad design.
It's not any one problem. It's that the freewheel is narrower than the modern 9-12s modern cassettes. That means the low limit is more in than it would otherwise have been.

Combine that with the thinner than current hanger which moves the RD more inboard and its.just too much.

Don't blame Sram or their engineers because design parameters have changed over the years.

It's your call, but I'll bet a few beers that moving the RD out 1 or 2mm with a washer on the hanger will solve the problem by offsetting the range and keeping the low limit from being that far in.
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Old 08-06-23, 10:48 PM
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Originally Posted by BikingViking793
The freewheel is a Shimano MF-TZ31 14-34.
Since it's a freewheel, a possible contributor to the problem is simply how the hub is set up. On freewheel hubs, the position of the cogs is referenced to the threading on the hub flange, not to the outboard locknut or the dropout. So depending on how the spacers are set up, the freewheel can end up more or less outboard with respect to the RD. In some situations it can be useful to mess with this spacing to solve issues, although if everything is otherwise working great I'd probably start with other peoples' suggestions to space the RD out a bit farther on the dropout with a washer.
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Old 08-06-23, 10:50 PM
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Originally Posted by BikingViking793
The freewheel is a Shimano MF-TZ31 14-34. How old would that make it?
huh... sure looked like a uniglide to me...

the point is that the freewheel is too far to the right for that SRAM der. to work with,... you have a few alternatives to consider... i'd re-align the entire rim and axle 2mm to the left, but you want to avoid that since you aren't a bike mechanic... i understand... i don't fix computers or TVs.

the SRAM der. is meant for a 7 8 or 9 speed cassette type wheel, according to SRAM's Site.
I don't like SRAM.. never have, never will.
their site claims to have info, but it's so scattered around, making sense of it can be just about Impossible... their Pull ratio list is growing every year, it seems.. when they buy a company(Avid, rock shox, etc..) the Product Development seems to end, then the problems begin to show up.. they show up during USE, because of what seems to be a relative lack of Real World testing.causing many customers to shy away from Buying that Brand ever again.. but they persist in doing things "the SRAM way"... Good luck.
to make that Der. work on your bike, as it sits, You WILL either need a different derailleur, move the hub/frewheel to the left slightly then recenter the rim, or upgrade to an 8 speed Cassette/freehub type wheel and corresponding shifter.
Hint: 8 sp. Cassettes are WIDER to the left, and THAT will give the L screw a different, more "backed out" position in the Der, keeping it from Hitting the WRONG PLACE on the Der..

and you STILL didn't say WHAT SHIFTER YOU HAVE ON YOUR BIKE. Indexed? Friction? Trigger? Twist shift? We still don't Know.


Hint #2: Rear Axle Washers are 10mm ID, and will fit between the Der. Hanger and Der...

Last edited by maddog34; 08-06-23 at 10:57 PM.
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Old 08-07-23, 08:56 AM
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Originally Posted by BikingViking793
Sorry, I explained what is going on in post #8 with a picture. The L-limit screw is making contact and blocking the derailleur from moving toward the small cog. I'm thinking derailleur is defective and not aligned correctly or something.

Thank you to everyone trying to help.
Clear as mud.
You have one of three things going on.
Burr in a cable
Bent derailleur/hanger
User error.- user error is adjustment and setup.
Because of the lack of enough pictures to really get a feel for your issue, these guys are trying to help you by braille.
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Old 08-07-23, 09:21 AM
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Originally Posted by maddog34
huh... sure looked like a uniglide to me...

the point is that the freewheel is too far to the right for that SRAM der. to work with,... you have a few alternatives to consider... i'd re-align the entire rim and axle 2mm to the left, but you want to avoid that since you aren't a bike mechanic... i understand... i don't fix computers or TVs.

the SRAM der. is meant for a 7 8 or 9 speed cassette type wheel, according to SRAM's Site.
I don't like SRAM.. never have, never will.
their site claims to have info, but it's so scattered around, making sense of it can be just about Impossible... their Pull ratio list is growing every year, it seems.. when they buy a company(Avid, rock shox, etc..) the Product Development seems to end, then the problems begin to show up.. they show up during USE, because of what seems to be a relative lack of Real World testing.causing many customers to shy away from Buying that Brand ever again.. but they persist in doing things "the SRAM way"... Good luck.
to make that Der. work on your bike, as it sits, You WILL either need a different derailleur, move the hub/frewheel to the left slightly then recenter the rim, or upgrade to an 8 speed Cassette/freehub type wheel and corresponding shifter.
Hint: 8 sp. Cassettes are WIDER to the left, and THAT will give the L screw a different, more "backed out" position in the Der, keeping it from Hitting the WRONG PLACE on the Der..

and you STILL didn't say WHAT SHIFTER YOU HAVE ON YOUR BIKE. Indexed? Friction? Trigger? Twist shift? We still don't Know.


Hint #2: Rear Axle Washers are 10mm ID, and will fit between the Der. Hanger and Der...
Will a washer mess up the B-tension screw?
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Old 08-07-23, 12:19 PM
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Originally Posted by BikingViking793
Will a washer mess up the B-tension screw?
With the understanding that we're talking about less than 3mm, and an OD small enough to clear the stop tab, then NO Problem.

If buying a standard 10mm or comparable washer at the hardware, odds are that you'll need to file or grind the OD to fit. The bright side is that it doesn't have to be perfect, just small enough to clear.

‐----------

TRY THIS before doing anything else.

It's a hot summer, so treat yourself to an ice cream pop, or Popcycle. It doesn't matter what because what you really want is the wooden stick.

Now loosen and back off the RD mounting bolt. Break off 2 pieces of the stick and wedge them under the upper body. Tighten firm, but not tight, swing the RD forward to its correct position, and test shifting.

If this solves your problem, all that remains is making a permanent fix.

OTOH - if it doesn't work, at least you had a cool treat on a hot day.

Last edited by FBinNY; 08-07-23 at 03:58 PM.
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Old 08-07-23, 06:33 PM
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Originally Posted by BikingViking793
Will a washer mess up the B-tension screw?
Be bold.. find out for yourself.
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Old 08-07-23, 07:29 PM
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Ok so I brought it into the shop and they messed around with it for 45min. 3 different mechanics looked at it. They couldn't get it working either. They check the alignment of the hanger and frame. Checked that everything should be compatible. After checking everything they could think of decided to just try another derailleur. They ordered a X3 and wanted to keep the bike and see if they can make that one work. While I wish the bike was working, I'm glad I wasn't doing anything wrong. Will see if they can get the X3 to work. So far not too big a fan of SRAM.
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Old 08-07-23, 09:45 PM
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Originally Posted by BikingViking793
Ok so I brought it into the shop and they messed around with it for 45min. 3 different mechanics looked at it. They couldn't get it working either. They check the alignment of the hanger and frame. Checked that everything should be compatible. After checking everything they could think of decided to just try another derailleur. They ordered a X3 and wanted to keep the bike and see if they can make that one work. While I wish the bike was working, I'm glad I wasn't doing anything wrong. Will see if they can get the X3 to work. So far not too big a fan of SRAM.
Question. You were here and got knowledgeable suggestions from two people who analyzed the problem and agreed on the cause. We only disagreed in the solution with one saying raise the bridge, and the other saying lower the water, essentially two ways to do the same thing.

Did you try to help those mechanics by a showing them this thread, which might have pointed the way, and allowed them to confirm or challenge our conclusions?
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Old 08-07-23, 10:03 PM
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Originally Posted by maddog34
Be bold.. find out for yourself.
Are you $#@&*%$ drunk?!!!!

This is 2023. Stuff like that is so-o-o-o passe, and ended in the last millennium.
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Old 08-07-23, 10:36 PM
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Originally Posted by FBinNY
Are you $#@&*%$ drunk?!!!!

This is 2023. Stuff like that is so-o-o-o passe, and ended in the last millennium.
yes, being bold is Sooo out of date.

now everyone is taught to cringe and beg.
my mistake.
Bad day, Francis?

and for the record, i've had two glasses of wine... in the last 6 months.

i had a Deschutes Black Butte Porter beer some months before that.
should i run to the nearest AA meeting?

Ever climbed Black Butte?
i have.
Great view.. it looks like you can reach out and touch Three Finger Jack or Mt. Washington.
this pic is of the Butte from Mt. Jefferson, looking east.
https://www.bwallpaperhd.com/wp-cont...BlackButte.jpg
The Head of the Metolius is in between the two hills... an entire river emerges from the gravel in about 50 feet distance.. It's perfectly clear and drinkable water.

i worked at Black Butte Ranch for a few months, back in 1977. Part of that job was chasing the elk herd off the Golf Course at Dawn.
i also worked at Hoodoo Ski Bowl, near Mt. Washington...

look 'em up on Google Earth... you need the fresh air.
been a few fires around there in the last twenty or thirty years,... bummer, eh? Bush jr. flew over the Santiam Pass blaze...that's where don trump came up with the "rake the forest floor" line.
i've mopped up a forest fire once... also 1977... Awbrey Butte, at the north end of Bend, Oregon, west of the Deschutes River.... it's a housing development now. I drove a fully loaded 6WD Army truck with a pump on the back and 3500 Gallons of water in the tank... at night, cross country, thru the Lava rocks and Juniper trees... we used a snake-like pattern to sweep the headlights thru the woods.. the root fires' smoke stood out quite clearly in the low beams....high beams lit up the nearby vegetation too much.

if you look at the Black Butte pic closely, you can see the lake at Black Butte Ranch, lower right in the pic... it's almost completely filled with sediment and grasses now... a seasonal marsh.. Some fool decided that the Beavers were going to cause a flood, and removed them all.... the trout couldn't handle the warmer water, so the mosquitos took over. No more lake.

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Old 08-08-23, 12:13 AM
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Originally Posted by maddog34
yes, being bold is Sooo out of date.

now everyone is taught to cringe and beg.
my mistake.
Bad day, Francis?

and for the record, i've had two glasses of wine... in the last 6 months.
Average day, following a good weekend. But, since we're on the record, I had 3 glasses of wine Saturday night, listening to the Willie Jones III Quintet. So good I stayed for both sets. If you like jazz and he's ever in your area, Go.

Last time I was in your area was bike biz related, but left the bike home. Instead went scuba diving with the octopi in Hood Canal, which, despite the cold were among my most memorable dives.
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Old 08-08-23, 11:21 AM
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Originally Posted by FBinNY
Average day, following a good weekend. But, since we're on the record, I had 3 glasses of wine Saturday night, listening to the Willie Jones III Quintet. So good I stayed for both sets. If you like jazz and he's ever in your area, Go.

Last time I was in your area was bike biz related, but left the bike home. Instead went scuba diving with the octopi in Hood Canal, which, despite the cold were among my most memorable dives.
Hopefully, you brought up a few abalone for lunch.. it is SOOO much better when fresh.

One of my compositions was played by the Mt. Hood Community College Jazz Band at the annual Jazz Concert. I had to drop out due to lack of money, so i gave them the song. Jazz/Funk/Rock fusion.
I listen to, among other styles, BrandX, Klaus Doldinger, Jean Luc Ponty, Flim and the BBs, Lee Ritenour, etc.

oh great.. now Nuclear Burn by BrandX is running on "repeat" in my head....

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