landdnl

I was going to purchase a frameset(Pedal Force CG1), and put a SRAM drive train on. The frame uses a "clamp on" 34.9 front derailleur. I just noticed that SRAM doesn't make a clamp on derailleur with yaw. Am I SOL? Is it the chain catcher that rules out band on type? I'm sure there's plenty of solutions, but are there any without compromises?

SkyDog75

SRAM makes a braze-on adapter.

https://www.artscyclery.com/Sram_Red_...Fe9aMgodYEQAFQ

fietsbob

?Yaw? , see : ..https://en.wikipedia.org/wiki/Aircraft_principal_axes..

maybe they wish to indicate the rotation of the band clamp around the seat tube?

or the motion within the curved clamping surface the derailleur bolts on, through..

that would be present as well if the frame had the fitting on it.


SRAM does have a website, you can ask them.

JTGraphics

I am using the Sram Braze on adapter with my Pedal Force RS2 frame and it works great several companies make the adapters and they all will do the job.

byte_speed

I just installed Red 22 on my Pedalforce RS. The chain catcher needs a special ear on the braze on adapter for adjustment. The SRAM adapter comes with the ear. There was a small piece with the FD that I assume was for this purpose for use with a different style adapter (old SRAM?).

I would check on this before you buy a non SRAM adapter.

Steve530

IMHO, if you're going to spend the money on a Red Yaw derailleur, buy the correct clamp.

JTGraphics

The ear you are talking about is not part of the bracket any bracket works, the part with the tab for the chain catcher adjustment is ion the part it goes on the front side of the bracket while the FD id on the rear side. between the to parts

cxwrench

You are incorrect. The braze-on version of the derailleur works w/ the tab on the concave washer. The clamp-on version needs the SRAM clamp. How do i know? I've actually installed them before.

JTGraphics

OP was asking about clamp on version here is one works fine

cxwrench

I know what the OP was talking about, that's why i recommended using the SRAM clamp. Your photo is known in the industry as 'doing it wrong'...sorry. If you buy the proper SRAM part​ you don't need to half-ass the job.
And i'm sorry, i described the derailleur(s) incorrectly earlier...there is only the braze-on derailleur, you need the SRAM clamp for frames that don't have a braze-on mount...if you want to do the job correctly. It has the tab built in to the clamp.

JTGraphics

Lol I love the know it alls this has been on for more than 2 years with no adjustments lets see yours but I'm done with the replies since the op has his answers ��

cxwrench

The derailleurs have only been available to the public for 1.5 years, so i think you're exaggerating a bit there. Not that it matters, it works for you. SRAM thought it was important enough to design a part specifically for the derailleur w/ the chain catcher and i'm betting they're a little more engineering savvy than you are. I don't claim to be a know-it-all but since i make my living working on bikes i know a little bit.

JTGraphics

LOL I have no idea what you are talking about now but that's Ok you seem to have the answers so en-light me, I bought mine 2 years ago were is your setup? I'd like to see a pro setup like yours. Never mind this says it all have a good day

njkayaker

Yes, "yaw".

cxwrench

It would be a lot easier for me to take you seriously if you could spell properly. I don't know how much more clear i can make it, but the '12 Red YAW derailleur wasn't available 'til feb/mar of 2012. That's 1.5 years.
Where is my setup? Mine is a braze-on w/ the chain catcher so it doesn't matter. All I'm trying to do is enlighten you to the proper way to adapt a Red YAW derailleur to a non braze-on frame. You can cobble together parts any way you want and it will probably work. The correct way to install the derailleur is to use the proper SRAM clamp that is designed specifically for that derailleur. Garage mechanics will always post what works for them, but that doesn't make it "right"...

Metaluna

I don't think this has been mentioned explicitly, but the main issue with using a third-party clamp is that the Red FD uses a special washer that has the tab on it for the chain catcher. This washer has a radiused surface where it mates to the braze-on bracket, so any third-party clamp has to be curved on both sides. Many braze-on adapters are flat on the backside (i.e. the side where the bolt head sits), so the special washer won't really mate cleanly and will be squashed down flat when you torque the fixing bolt. Hopefully the torque of the bolt will be enough to keep the washer from rotating under the load of a chain drop, but I think the SRAM clamp would be much more secure.

In my case I didn't have the right kind of clamp (SRAM doesn't make them for a 28.6mm steel seat tube, and I hate messing with shims), so I just used a separate chain catcher (an N-Gear Jump Stop) and left the SRAM catcher in the box.

Nerull

SRAM FDs are no longer pure parallelograms but instead rotate slightly in the yaw direction to improve chainline and remove the need for trim. So yes, yaw.

Metaluna

There's a YouTube video around somewhere that shows the motion. Basically, the front of the cage moves a lot more than the rear, giving the illusion that the FD is sort of pivoting on its tail.

fietsbob

Interesting, engineering, making up for what was so simply done by hand with a friction shift-lever.

re center the cage after the shift. ... since nobody remembers how to do that anymore..

( & STI doesnt allow any)