dooodstevenn

before i buy a new frame i just want to make sure my parts now are compatible.

-are all derailer hangers the same? or are they unique to each bike/manufacturer?
- what is the differance between a 3k weave and a 12k weave? whats better?
- i have a TruVativ GXP integrated external bearing bottom bracket, since it has the "self extracting bolt system" there's no difference in size correct? so it should fit frame with a 68mm english bottom bracket
-can i re-use cable's and housing?


thanks in advance for any replies

Jinker

Yes, you can reuse housing and cables. If the bike's more than a couple years old though, I'd have to ask, why would you? If you're building up a new bike, you owe it new cables and bar tape.

Der hangers are *not* the same. There's a hojillion of them out there. Generally each manufacturer will use either one or a handful of different styles.

The 'k' is the number of thousands of carbon filaments in each bundle in the weave. Often woven carbon is only used on the surface layer, and unidirectional carbon sheets are used underneath.

Dunno about your BB question.

ptle

First two questions I'm not exactly sure...

I think derailleur hangers are all pretty similar.

I don't know the difference, but I've heard it purely cosmetic. The weave patterns are different or something. I don't think one is better than the other.

I use the same BB and it fits 68mm English BBs.

You can reuse cables and housing. Once cables are cut they can easily fray if you try to thread it back into the housing. Also you shouldn't use any rusty cables or ones with kinks in them or sharp bends. Housing is usually reused more often. However if there's a kink or damage on the ends, you may want to replace them.
Use your judgment, to see if you should replace.

dooodstevenn

how could i determine the proper hanger you use on a frame? also higher number "K "weave does not necessarily = stronger carbon, since the carbon under is the same correct?

mazdaspeed

Shimano slr housing and cables are dirt cheap on pbk, you might as well spend the extra 10 bucks and get new ones.

dooodstevenn

well im going to try to reuse housing and cable if they fray, ill go pick some new ones up. everything is pretty much new anyways. i've only had about 200 miles on those cables

dmp

wrong: look here: https://derailleurhanger.com/
they vary a lot even from the same framebuilder. You need to know the model and year of manufacture.

Buy new cables if they are remotely old- even the fancy Campy ultra low friction ones are less than $50 from pbk. 200 miles is nothing, though- if they are not frayed I would reuse them as long as the lengths are ok.

dooodstevenn

well then..i guess im crap outta luck im not sure if this frame comes with a hanger, because i was going to try a generic ebay carbon frame.
https://cgi.ebay.com/New-3K-Full-Carb...item563d1c3cc8

fogrider

english = 68.0
all carbon is different...but for a 48cm frame...maybe 3k is good.
I would think the frame comes with a derailleur hanger. yes the hanger is designed for the frame, but all modern derailleurs fit onto them.

blamire

derailleur hangers are different to nearly every manufacturer and can be different to every single model of bike. they may look similar enough and all do the same job but you will always need the exact right one.

coasting 

why are you worrying about the hanger? if you buy a frame, it will have a hanger on it. the frame might not even have a replaceable hanger. i cannot imagine a frame being sold without derailleur hanger, headset, seat clamp.

as to BB, the most common is English (68) standard. You should ask to make sure it is the same but chances are they will be english.

you can re-use cables but why bother. Nice new cables are just...nice.

JaceK

Carbon fiber is rated by the filaments in the weave. 3K means 3 thousand, 12K is 12 thousand. Traditionally structural components are made with 3K, it stiff and has excellent tensile strength. 12K is used as well because it is more flexible, and will have simular strength to 3K at lighter weights. So which is better... a mix is ideal... where you want high strength 3K, places like BB, Head tube, fork... you can add comfort or some flex in areas by using 12K. Alternately a completely 12K frame will be lighter, more flexible ride, without giving up strength.

dooodstevenn

thanks for solving the carbon issue! one more question how much stronger is 3k compared to 12k? i have this image in my mind going 35mph down a hill hitting a bump and SNAP, yet again the smoother ride is always nice. ahh the choices..

JaceK

Naw no troubles, just different feels to the ride. A nice 3K frame will flex very little, so you can climb with it, sprint with it, and transmit power better, while a 12K will be comfortable enough for long rides, and flex more. Most frames now are a combination of several fiber grades. However the days of frames shattering over rough road is long gone. I weigh over 200# and ride the snot out of several types of carbon frames.

Namenda

The frame comes with a hanger, no worries. The 3k/12k thing on that frame likely is purely cosmetic, not structural, so again, no worries. If the cables are long enough, you can reuse them, no worries. Your bottom bracket will fit, if its an English thread like you said, so no worries there, either.

All in all, no worries, so long as the frame is the right size for you.