Chainring for a Shimano FC-CX50 I have a 2013 Scott CX Team Cyclocross which has an FC-CX50 Crankset.  Unfortunately, I cannot afford a road/triathlon bike right now and I have been using this for triathlons.  I now have road tires on it which has helped a lot but am tired of being passed spinning away maxed out.  I am looking for the cheapest option for an upgrade and I thought that I could look at switching the Crankset's Chainring to a 50 from a 46.  That should give me a little more speed.  I am pretty new to bike mechanics and I did not want to order a chainring till I was sure it would work.  Would someone be able to point me to a Shimano unit that will work or is this even possible?  If so, can I assume that I will probably need a new chain as well?  Thanks in advance.
A CX-50 is usually fitted with 46-36 and is 10 speed. Occasionally I replace the 36 with a 34 on mine. Any flat 110mm BCD ring of 50/52 will fit instead of the 46 ring and the 36 is the usual combination with a 52.

The chain will have to be 2-3 links longer and the FD must move up by one or two mm to clear the big ring.

(Note: You may even change the rings without having to remove the crank from the bottom bracket, as they can easily be manoeuvred around the arms and the pedal.)