Do you have any problems related to teh bruise on your short rides? My one caution is the usual caution for going longer, that thigns that yuo barely notice on a 10 mile ride can become unbearable on a 60 mile ride, could be squared with an existing condition.
Might be wise to have a bailout plan. Better to have one and not use it than to need it and not have it.
As other have said only yuo can decide. I know some people who can have a bruise and never notice it (like me) while with others a bruise gets worse and worse at teh slightest contact.