Centaur2007

Will Dura-ace 9 speed bar cons work with an SRAM 9.0 derailier ?

juicemouse

Only in friction-mode. Any SRAM derailleur with their "ESP" feature requires a shifter that pulls more cable than either Shimano or Campagnolo.

HillRider

Shimano shifters work with SRAM rear derailleurs that are advertised as "Shimano compatible" and do not work with the SRAM derailleurs that are listed as having a 1:1 cable pull. I'm not familiar with the 9.0 but that's how you tell if the shifters will work.

Retro Grouch 

I'm not so sure but I've never tried it. SRAM derailleurs require quite a bit more cable pull. Even in friction mode a Shimano shifter might run out of range before it pulls enough cable to shift actoss the entire cassette.

juicemouse

Good call. I did not consider that. The indexing, at least, will not work.

Centaur2007

Thanks ya'll. I guess I'll have to stick with the Gripsift thing.

juicemouse

SRAM offers a few trigger shifters in their "1:1 actuation ratio" too. If you're not a Gripshift fan, these get great reviews.

Tom_OHara

The short answer to your question is NO.

A DuraAce shifter will work just fine with a SRAM ESP (all of the digit.0 RDs) derailler IF you only want to shift half of your gears. 4 cogs of an 8 speed for example. This is because of the cable pull that was mentioned earlier. Even in friction mode, the SRAM ESP deraillers need twice as much cable to be pulled than a "standard" Shimano compatible shifter pulls. (I tried this myself trying to use friction bar-end shifters to shift a 9.0 RD - I decided that I needed more than 4 or 5 of the cogs.

The SRAM trigger shifters are for MTB bars and do not work on road bars. Since the DA shifters are for road bars, I assume that the poster is planning this for a road bike.

Your choices at this time really look to be limited to finding a different RD.

Good luck with it.

Tom O'Hara

Matt Gaunt

You ever used them? They're so clumsy IMHO. The triggers get in the way of one another, certainly on the models I tried out at the LBS. Downhill could get real dangerous with those fitted I reckon. Gripshift is far superior and is also better than the barcon idea I think.

What other design of shifter, save entry-level Shimano ones of the mid-nineties, allows you to shift from top to bottom cog on the block in fractions of a second? That is the beauty of gripshift for me.

juicemouse

No, I have not used them besides at my LBS. I prefer Gripshifters on my MTB too, but there are a whole group of people who hate Gripshift because they shift inadvertently when the trail gets rough. SRAM's triggers are especially preferred by downhillers for that reason. I didn't mean my post to be an outright endorsement, just an alternative suggestion.

See: https://www.mtbr.com/reviews/shifter/



Uhh, barcons?

Matt Gaunt

True. I have the short GSs so it's not a problem for me, but it would be if I had full size. Yeah, the triggers I used were really bad. If I had gloves on, I don't think I would have been able to get my thumb in between the gap left by the bar and the bottom shifter to get to the top shifter.


True again, it's just that I always think I'm gonna break them off when they reach the end of their travel!

juicemouse

There isn't a Shimano shifter in existence that will work a SRAM ESP rear derailleur, even over half the cassette and no matter how many cogs you've got. SRAM referring to their drivetrains as "1:1" and Shimano as "2:1" or that they pull "twice as much cable" are just marketing, not the actual ratios of cable pull. SRAM is actually quite close to a 1.1:1 ratio, current Shimano (not old Dura-Ace) is quite close to 1.7:1, and old Dura-Ace is close to 1.9:1. Therefore, if you shift a Shimano 9-speed shifter over a 9-speed cassette using a SRAM ESP rear derailleur, the chain will move 2.80mm per shift. Shimano 9-speed spacing is 4.35mm per shift. Ain't gonna happen.

Centaur2007

Thanks ya'll. I guess I'll have to stick with the Grip Shift