I tried a brand new out of the box KMC X10SL on my XG-1090 11-28 over the weekend. It was unbearably loud. Stuck the 1091R back on, and it was nice and quiet once again.

Seems bizarre that there would be such a difference in noise.

Anyone have experience with a shimano chain on the XG-1090? (I've got some new praxis rings which don't recommed the SRAM chain)

Any music by the beat combo Metallica turned up very loud on my stereogram can cause the neighbours dog to do a poo poo .My sram cassette cannot do this .

I'll be the third or so to say I have had this same experience. I went with the KMC X10SL based on rave reviews but it just seems a lot noiser than the 1091R. I like the fact that they KMC chain comes in black or red/black, which looks cool, but I think I am going to have to go back to 1091R chains for my New Red cassettes.

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R5 VWD | 2008 SRAM Red | Rotor 3D+ SRM | Zipp 101s/Enve 3.4s
S5 Team | 2012 SRAM Red | Rotor 3D+ SRM | Enve 6.7s
P3C | Zipp Vuka Aero/R2C | Omega | FSA SRM | Zipp 808/Super 9 Disc
T1 | Scatto | Rolf Prima FX58

Is this quiet weenies or weight weenies?? If there is no performance gain, just a bit quieter why??

1091R is 1 gram lighter than the KMC 10SL, I have two of each and double verified. Also 100% acurate is the 1091r is much quieter than the KMC.

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Curt Brown
2012 Cannondale Supersix EVO SRAM Red 10.8#'s
2012 Cannondale Super X 14.1#'s and dropping....
2011 Cannondale Carbon Flash 1 17.2#'s
1999 Cannondale F2000, SRAM XO 18.9#'s
http://cbevo.com/2012_cd_supersix_evo_31.html