xg43x

Has anyone besides Zinn actually attempted to use their Campagnolo Ergopower levers with a Sram rear derailleur? By doing this it would open the door to a wider selection of hubs and wheelsets. I enjoy Campagnolo components, but the cost is simply out of my budget.

thirdgenbird

the rear derailleur has nothing to do with what wheel you use.

the indexing in modern systems is in the shift levers. this NEEDS to match the cassette spacing you use, which determines what wheel you use. also, different brand shifters will pull different lengths of cable so they also traditionally need teamed up with the same brand/type derailleur.


now, with all of that said there is a company that creates a device that will change the cable pull and allow you to mix and match components. i can not recall who it is, but someone will chime in.

you can also get special cassettes (ive seen them for 8,9, and 10 speed) that work with campagnolo components but sram/shim wheels. this would not make things cheaper for you, but it would open up your wheel options.

RichinPeoria

I dont know if it would work.

I just think that its a gamble and if your budget is low and it does not work out for you them you have paid for something you cant use.
Its best to use components that were ment to work with each other. I have only Campagnolo on my modern bikes and everything from the same gruppos.

ComesATime71

So why do you wanna use there shifters? They function just like SRAM or Shimano.

queerpunk

The JTek Shiftmate is the device in question. A little device that you thread the cable through before it gets to the RD. Changes the cable pull in a variety of ways so that you can mix and match to your heart's content.

That said, despite all the naysaying on here, I've heard plenty of stories of accidental crosscompatibility. Teammates in a pinch have used 9speed shimano when they've flatted on their campy and said that the spacing is close enough to shift well. And the Zinn article says that the SRAM/Campag mix works.

carpediemracing 

I'm looking into this too. A local shop said it didn't work well, no JTek on that particular bike. No experience first hand.

I'm looking to convert to Shimano/SRAM cassettes/hubs but I like the Ergo brifter's "ergo" best. For weight/cost/durability the SRAM hollow cassette seems like the best deal. For training probably the Ultegra, if not a SRAM lower end one (I haven't looked very hard). Also most folks are on Shimano/SRAM compatible hubs.

cdr

thirdgenbird

the similarities to me stop at "they are both devices that mount to handlebars and pull cable in indexed increments"

ComesATime71

You keep telling yourself that.

thirdgenbird

different:
the ergonomics
she shift lever configuration (very different)
the actual shifting feel
campy permits shifting more than one cog at a time
campy and sram dont use "the pod" that requires the shifter to be thrown away when shifting becomes poor.
many shimano shifters have external cable routing
campy has brake release built into lever shimano and sram do so on the brake
current sram= 10spd
current shimano = 8,9, or 10spd
current campy = 10 or 11 speed


i dont care which you like best, they are nothing the same

DaveSSS 

A Campy 10 shifter pulls 2.5mm of cable five times, 3mm twice and 3.5mm twice. A SRAM RD requires a uniform pull of 3.1mm per shift. It take a Campy shifter 5 clicks to pull the same amount of cable that SRAM shifter does in 4. That's a full cog's worth of positioning error after only a few shifts.

J-tek makes a shiftmate that increases the average 2.8mm cable pull of a Campy 10 shifter, so it will correct some of the problem, but it can't correct the fact that the pulls are not uniform. The last two pulls are already too large to start with and will only get worse if the pull ratio is increased.

If you take the ratio of Campy's average cable pull to that of SRAM, you get 2.8/3.1= .903. Mulitply that times the cog spacing of 3.95 and you get 3.57. That amount of travel is far less than the 3.8mm spacing of 11 speed cogs.

There is some question about that 3.1mm SRAM cable pull number. I've also read it's 3mm. That would give an average RD movement of 3.73mm, which is better, but still quite a ways off, particularly on the first 5 shifts, where the real pull in only 2.5mm.

The bottom line is that mixing nonuniform pulling shifters with a RD requiring a uniform cable pull is never going to work great.

About the cost. Check out Ribble or Shiny bikes in the UK for low prices. In the long run you may find that Campy actually costs less to use. Just about every brand of prebuilt wheel (except Shimano) makes hubs that accept Campy 9/10/11 cassettes for the same price.

Check out the price of Campy Record hubs at Ribble. They've cut their offerings way down, so there are no 28H hubs anymore. You have to buy prebuilt wheels to get low spoke counts.

ComesATime71

I ride campy exclusively. I'm also smart enough to know they perform the same function. They change my gears. Anyone can get used to the ergonomics of any shifter, That defense is a joke. Almost as funny as people mixing groups. If you think 11 speed and 10 speed function any different, you haven't ridden it yet.

PS: If you didn't care what I thought, you would type 50 words of nonsense.

ComesATime71

Speaking from an engineering standpoint is only going to confuse people on here.

queerpunk

wait, seriously? you're going to begrudge somebody their preference in the shape and feel of the thing they rest their hands on when they ride?

what next? all saddles are the same because they all serve the same function, so someone shouldn't prefer one over the other?

DaveSSS 

Skip the details and go on to the bottom line. It won't work well, bad idea. I've just got the facts to back that up rather than conjecture.

thirdgenbird

why do you ride campy exclusively if its all the same?

who was i defending? i was just writing differences (most of which you ignored)

if you think 10 and 11 speed function the same why dont you try and mix them...

Shimagnolo

fify

ComesATime71

By you name, I'd say you are one of the confused.

PS: I said most, not all. Learn to read..

ComesATime71

Because shimano would look dumb on my Colnago and Pegoretti.. : ) I've ridden Shimano and liked it's performance, I just didn't like the external cables. Now that they have fixed that, I would give Shimano another look on a future build. I have my eye on Parlee...And unlike the OP, I can afford it.

thirdgenbird

i completely agree. i am also a campy rider (even my fixed gear is chorus minus the hubs) shal we call it a truce?


OP:

as much as i like campy, if you are on a budget (and dont want a used group) i would just stick to full sram. its good stuff that works quite well. i may actually use it myself on my next build.

Shimagnolo

Not confused at all;
I have two bikes, one all Campy, and the other all Shimano.
I see no need to make life difficult by trying to mix incompatible parts.

ComesATime71

It's not any cheaper then Centaur, which is more then any rider needs. If you're a weight weenie, god bless, but all does the same thing IMO.. If he finds the ergo's being a must have go centaur.. If not, stick w/ SRAM. They make nice stuff.

ComesATime71

I know you have the facts, you have been regurgitating them over and over on here and RBR..

ComesATime71

No truce needed. We're just talking bikes during the boring winter months. Don't take it too serious.

thirdgenbird

i think you pinpointed my angst. i was going to go for a ride today and woke up to 34 degrees and pouring rain. i cant wait till spring...

Rutnick

good grief. That's the problem with this place. The guy asked if anyone had actually done this or not. Not the rest of the drivel posted.

Yes, I have used this setup. Centaur shifter, SRAM rival rear derailer. It worked just fine. No issues at all and I used it this way for nearly a year. I still keep a spare set of campy cetaur shifters just in case my red or one of my friends SRAM shifters break and we have to do a warranty exchange.

I will take it a step farther and say that I had a rival rear derailer and a dura ace front derailer with zero issues. I used 2006 campy shifters. 10 speed.