I'm still hesitant to buy a 13-29 cassette for my short cage Chorus 10. The Branford Bike site says that it will fit the 29 tooth cog but it will exceed the chain wrap. 50/34 and 13-29 yields 32 and the wrap spec is only 27. As it is now I exceed that with 29 but don't have any issues. Hmmm, maybe if I put my 36 back on for the small chainring... Nope, it would go from a 35" low to a 34" low, not worth it.