TUBE? stock to kenda 270 5.10

New to all this so askinig questions before I screw something up.



got a Kenda K270 5.10 - 18. this weekend plan on attempting my first tire change. Was going to replace my tube so need to know if the size that is in there is the size I replace it with or do I need something larger?



thanks

-retro-



BROWN SANTA came by house today!