Join Date: Jun 2008
Location: San Diego
Bikes: 2006 Bianchi 928 Record and 2002 Bianchi Axis 1x9
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The Fantom Cross comes standard as a 2x9 with Tiagra shifters. While I'm positive that you can convert it to a 1x10 setup, I must as why you want to do this. I would recommend a 1x9 setup as you will already have the chain and cassette ready to go. Of course this only applies if that cassette is the same ratio as you'd like to run. Another reason for a 1x9 is the shifter choices for flatbars. With a 9spd you can select from either the road or mountain flatbar shifters. With a 10spd, I think your options are limited with a barcon and Paul Thumbie being the best option IMO.
For me the choice would come down to whichever is cheaper. Obviously you're going to sell the Tiagra shifter, fd, dropbars for sure, and maybe the cassette and chain if going 10spd.