I am thinking of fitting a set of new tyres for my first century ride London. I have a giant tcr 2 with the standard giant tyres it comes with giant sl 2 these can not be bought separately as they only come on complete bikes i know this having had a split tyre in the past from a pot hole and not being able to get a like for like tyre. I would like to upgrade and really like vitro ria corsa g + isotech these are priced at 55 pounds . I have also seen vittoria open corsa cx reduced to 22.49 from 49 pounds. Which would be the best buy is it worth paying the extra for the G+ do these tyres offer better puncture protection over the giant ones I have fitted . I don't want to upgrade and then run higher risk of getting a puncture. Many thanks.