What are these?
 

Got a new Raleigh RXS that has TRP hylex hydraulic brakes.

What are these things on each line? Not pictured on the raleigh website and TRP doesn't show them either.

deleted because [MENTION=158672]FBinNY[/MENTION] is smarter than me. ;)

Actually, I reread the OP, and noticed that these were hydraulic, and deleted my post. It's still possible that these are some sort of brake force limiters, but I don't know the specific details of these brakes and can't say for sure.

I suspect that if there's any kind of adjustment of both ends, then they are a variable volume chamber and used to fine tune the pad clearance. If there's no ability to adjust anything, then they're probably a force limiter.

If they are a force limiter, I suspect that if cut open, we might find a piece of slightly soft elastomer, which would compress as the surrounding oil pressure increased.

I've been searching the last few minutes and still can't find anything that resembles them or is mentioned anywhere.

I came across a Bike Rumor article that mentioned the possibility of a quick disconnect, but it was far from definitive.


I can also email TRP and ask...

I thought about that, too.

My first thought was the same as everyone's when I first saw the picture and I assumed they were inline cable adjusters until I saw the hydraulic reference too.

They may indeed be quick disconnects, or even just line breakers (to be followed by thorough bleeding) to allow the hoses to be routed internally on frames designed that way.

It is for so called "hybrid" braking systems, which are taking bicycling world by storm these days. They are hydraulic by nature, use hydraulic hoses, but at the same time run a steel cable inside the hose. Hydraulic fluid provides that modulation feel everyone is so fond of and lubricate the cable, while the cable helps the fluid to circulate and also provides redundancy in case of leak or rupture.

For obvious reasons, systems like this have regular inline adjusters, despite being marketed as hydraulic.

One way to check if they're barrel adjusters: twist 'em and see if the brake tightens.

I suspect Andrey's right.

OK, did you just make that up?I mean it's OK if you did cause it's as good as anything I could have come up with.

I have something similar I was wondering about - not to hijack the thread. This is on my Diverge Expert X1 (pure force hydraulic). I thought they were quick connects to make it easier to repair for through body cabling. Am I wrong? These do look a it different - more like a connector.

https://photos.smugmug.com/photos/i-...-WGX7RdT-L.jpg

It IS April 1.

Yeah, but the gags are supposed to end at noon, aren't they?

I always thought that rule was something the Canadian school system made up to keep kids in tow.

But that is the TRP Hy RD, not what he has. http://road.cc/content/news/81716-tr...c-roadcx-brake



:innocent:

It's probably just a connector so that you can disconnect the hose, thread it through the frame, and then re-connect it with minimal fuss.

April 1st has been cancelled this year. There's no way gags can overtake reality....

That is what I am thinking for mine. I want to reroute the hoses up-front and wonder if these might help.

According to TRP they are couplers for systems that use a banjo fitting on a hose longer than 2000mm. Interestingly enough, I don't think either line is that long. The frame is routed internally so I would agree that I think that has something to do with it.

That's a SRAM Connectamajig. It allows the hose to be disconnected without having to be bled. They snap shut internally when unscrewed.

Hey, thanks. I had hoped but didn't realize they had them inline. I found documentation and was able to reroute my rear hydraulic line so it doesn't rub against the junction of the fork and head tube.

Manual said you could use it 3x without bleeding, but it dropped the pull by quite a bit, so I think I will bleed it next chance I get.