I know that there have been many 1x questions, so bear with me. I have converted to a 1x setup (50T, Wolftooth Chainring), on P2 (2009 model), with a 9-speed ultegra long cage. Currently I have 12-27 and 11-28 handy. I saw on another posting somebody saying that its better staying with a larger ring in front because of chain retention. Ironically I was going to buy a 48T right before I saw that, but my biggest fear is the chain falling off as I go to a lower chainring (there have been no drops w/the 50 so far)..

Anyway, to the 1x bike experts out there....If I stay with 9-speed, would it be better to stay with my cassettes (12-27 and 11-28) and go with a 48T, or stay with the 50T and go with something like a 12-30? Or it it worth it to upgrade to 10-speed (I can't afford to do 11 at the moment). My ftp is 240 on the powerbeam, and average around 59-1:02 on flat 40k's, but I may do some races with more rolling hills than flats, so I guess my concern is not having the gears on the low-end.

Thanks in advance.