DOS

What’s with Shimano derailleur terminology? Forever “b-limit screws” have controlled distance betweeen derailleur pulleys and cassette sprockets a “limit screws” (high and low) have been used align dearaiileurs under the cassette. Now, in Shimano manuals, they have been renamed “End adjust bolts” and “top and low adjustment screws”. I don’t care for it.

shelbyfv

I think they want us to discount everything we thought we knew about derailleurs prior to the most recent 11 speed. Set up is soooo different, they want to be certain we read the manuals

thumpism 

That's what you get for buying new stuff. There's a way to avoid that.
@DOS, see if you can answer the Manassas question in General Cycling. Thanks!
https://www.bikeforums.net/general-c...-manassas.html

Moe Zhoost

If I'm not mistaken, Shimano called it the "B-tension adjustment" screw. Makes sense since it really does not "limit". You must not be so old since you can actually read the fine print of the product inserts, a task that I struggle with.

WizardOfBoz

I suspect that Shimano, in order to cut expenses, probably fired all the experienced copywriters for their manuals. Or hired general translators with no experience in cycling to do a generic translation of their Japanese (or Chinese?) manuals. Japan's economy is in suspended animation - exports down again according to today's reports. Rather than the famous Japanese drive for perfection, I think you're getting something more like ennui.

Point is, I don't think that Shimano is trying to change our terminology. I just think that they've lost the will to care.

JohnDThompson 

SunTour had it before Shimano, and called it the "Angle adjustment screw:"

WizardOfBoz

Sun Tour came up with some of the real improvements in bike tech in the 70s. In fact, I like Sun Tour terminology. "b-limit" requires one to be "in the know". "Angle adjustment" is a more descriptive term. "Angle Adjustment" and "High" and "Low Adjustment" screws are clear ways to describe things.

"High limit" and "low limit" screws are way better than the current Shimano terminology: “End adjust bolts” and “top and low adjustment screws”. Yuk. I actually hate it for an additional reason: non-parallel construction. Because the love for proper English was instilled in me from an early age and hammered into me in preparing slides for clients in my consulting business I find the following pairs ok:

Top and Bottom, or
High and Low, or
Hi and Lo, or even
H-L

But you shouldn't have

Top and Low, High and Bottom, High and Lo, etc.

So Shimano is non-standard, less descriptive, and poorly worded. Sigh.

3alarmer 

.
...a rose by any other name would still be right hand threaded.

rydabent

If they indeed did call it the B-tension screw, it may be the source of the idea the B screw is a tension adjustment. As pointed out it is for the clearance between the sprockets and the jockey wheel.

AnkleWork

Que Emily: "Never mind."

hokiefyd 

Yeah, I think they changed the name of this because the function actually did change.

Where you used to set the tension of the rear knuckle's spring on a Shimano derailleur (as in "B-tension screw"), which indirectly set the angle of the derailleur (even though the knuckle could swing), you now directly adjust the angle of the derailleur, which pivots the whole body around that "B-link", moving the guide pulley up and down in an arc, at least with Shadow-style derailleurs.

I reckon this is why they changed the name, apparently to "end adjustment bolt". I imagine they still use the old terminology on their traditional derailleurs (like RD-T4000 for example).

Bill Kapaun

You could just quit.

Moe Zhoost

And I'm old enough to know who you are talking about. Love it.

DOS

Ha, I just checked. That OP has gotten the advice I would have offered.