Drakonchik

Are SRAM Rival/Force/Red brifters compatible with any SRAM mtb derailleurs? I ask because I'd like to run a SRAM 10 speed drivetrain with 11-30-something rear cassette. So I need a derailleur that can handle a cassette with a max cog of 30-something teeth and at the same time be compatible in terms of cable pull.

On a side note I gather that 10 speed SRAM, Shimano, and Nashbar etc aftermarket 10 speed cassettes are all interchangable.

To put the question another way: what do you do for a rear derailleur if you want to run a full SRAM drivetrain & shifters on a cyclocross bike having a standard or compact road double crank? Where the rider in question most definitely wants to run a rear cassette of at least 30 max teeth?

kycycler

To put the question another way: what do you do for a rear derailleur if you want to run a full SRAM drivetrain & shifters on a cyclocross bike having a standard or compact road double crank? Where the rider in question most definitely wants to run a rear cassette of at least 30 max teeth?

You can get the SRAM XX mountain bike derailleur. It will take the 30 tooth you are thinking about. I believe it will take up to a 36. I am sure someone will corect me if I am mistaken.

operator

Someone back me up on this sram road uses 2:1 while the sram mtb stuff uses 1:1 therefore not compatible. You can use a shimano sgs derailleur if you want to run something up to a 34t.

reptilezs

sram road uses 1:1. i am not sure if the mtb derailleurs will be compatible. if the road and mtb stuff is compatible it wouldnt be too much for the mtb derailleur to take a 36t cog

reptilezs

well you can use the sram xx rear, the xx cassette and 10 spd road shifter https://velonews.competitor.com/2009/...d-parts_100789 i also saw a cx bike with xx stuff on it, dont remmber where and im still looking for it

PlatyPius

SRAM road and MTB both use 1:1 as far as I know.

From the Road area:
Exact Actuation


When we launched our road technology from scratch we reapplied our MTB proven SRAM 1:1 actuation ratio (shifter cable travel : derailleur movement) for 10 speed rear shifting. EA helps to simplify/stabilize the uneasy act of balancing rear derailleur hanger design, tight cog spacing and exact cable tension. The result: the easiest index shifting system to set up and it stays that way.




Products That Use This Technology

• SRAM Red DoubleTap® Controls
• SRAM Red Rear Derailleur
• SRAM Force DoubleTap® Controls
• SRAM Force Rear Derailleur
• SRAM Rival DoubleTap® Controls
• SRAM Rival Rear Derailleur
• R2C Aero Shifters
• 900 TT Shifter
• 500 TT Shifter
• DoubleTap® 10 Flat-Bar Road Shifters
• DoubleTap® 9 Flat-Bar Road Shifters

From the MTB area:

1:1 Actuation™

1:1 Actuation™ is simply superior. The very nature of its design makes it this way. For every 1 unit of cable pulled or released, the derailleur moves the same amount. Simple? Yes. Dependable and tolerant? The best. Ease of set-up and adjustment? Easiest. This is why the top athletes in the MTB world prefer SRAM. From the mud infested Cross Country of the Sea Otter Classic, to the rocks and roots of a Fort William World Cup Downhill the 1:1 actuation stays precise and fluid. 1:1 Actuation precision is why you find SRAM on the elite bikes from cross-country flyers to full gravity bombers. 1:1 • Setting the shifting standard!

joejack951

This was discussed in another thread a while back and I remember the conclusion was that XX deraillers will work with the SRAM road shifters but previous SRAM MTB rear deraillers will not. I have never experimented with anything SRAM so I can't confirm or deny any of this.

operator

Oh actually I DO remember that thread. The OP said he had contacted SRAM and said that even though they were compatible on paper the pull ratio was actually slightly different between road/mtb group. I'm not quite sure I believe that but that was apparently the official word.