What kind of bike have you been riding before this? Are you going, say, from an upright hybrid to a road bike?
How fit are you? Have you ever ridden a metric century before? What distance are you comfortable riding right now?
Do you have every reason to believe that this bike is going to fit you reasonably well from the onset, so that only minimal adjustments will be necessary to dial in the fit? Did you have someone who really knows what they are doing set up your bike for you? Do you know your body well enough to know what kind of adjustments you will need to make it work for you over a 62 mile distance? Have you ever ridden on the saddle that is coming with this new bike?
In a word, there's no simple answer.
A lot of it hinges on how well the bike fits you, how comfortable the saddle is for you, and how comfortable you are with riding and handling the bike. If all those factors are OK, then you probably could do the metric just fine on the new bike.



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