Not enough information.
Location? Road conditions? Weather? Rider weight? Flat-causing hazards such as goatheads or thorns? Tire/rim size??? Will frame allow size???
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'75 Fuji S-10S bought new, 52k+ miles and still going!
'84 Univega Gran Tourismo
'84 Univega Viva Sport
'86 Miyata 710
'90 Schwinn Woodlands
Unknown brand MTB of questionable lineage aka 'Mutt Trail Bike'
Plus or minus a few others from time-to-time