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I am a proud owner of this guy. The crankset is SRAM S1200, 36/22 and the FD is SRAM X7, direct mount.

However, the cage on the FD broke, and I ordered this item in a hurry.

1) Dyna-Sys 10-speed design – for use with Dyna-Sys 10-speed MTB drivetrains.

2) Specifically developed for 68 and 73 mm bottom bracket shells with a 48.8 mm chain line 

3) 66-69 degree chainstay to seat tube angle range.

4) 44-38 tooth outer ring compatible, total capacity 14 teeth

Questions:

1) I have heard Shimano and SRAM FDs are compatible - is that true?

2) 73mm BB - check, 48.8mm chain line - how do I check this? Is it correct to measure with a ruler from the center of the frame to the middle of the two chainrings? I doubt I can get accurace better than a couple of mm.

3) 66-69 degrees chainstay - check - it it inscribed on the old FD.

4) The tooth capacity is OK, but my big ring is 2 teeth too large.

All in all, can this equipment work together or be made to work together, or do I need to toss it?

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I have never heard that Shimano Dyna-sys is compatible with anything but Dyna-sys. However since it's a front derailler and is only a double it "might" work if anything does. Generally if you have SRAM shifters, you need SRAM deraillers. I would only attempt this if it was not possible to exchange the Shimano for the sram. SRAM deraillers generally have very different cable pull lengths than Shimano. –  Fred the Magic Wonder Dog Jun 9 at 18:39
    
Did some more digging and it looks like SRAM and Shimano cable pulls for front deraillers are "close enough" that this might work. –  Fred the Magic Wonder Dog Jun 9 at 18:51
    
Since you have it, bolt it on and see what happens. No point throwing it away just because you think it might not work. –  Mσᶎ Jun 9 at 23:45
    
Seems better to return it and get the sram part. –  Batman Jun 10 at 2:35
    
Is a triple suitable replacement for a double? What are the differences? –  Vorac Jun 18 at 15:41

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