TKOF ABORTED DUE TO ACFT EQUIP PROB MALFUNCTION.

Narrative

DURING TKOF WITH FO AT THE CTLS; WE ABORTED DUE TO NOSE VIBRATION. WE TAXIED BACK TO GATE TO INSPECT PROB. DURING TAXI I NOTICED NOTHING WRONG AND EVERYTHING SEEMED NORMAL. UPON REACHING THE GATE I SHUT DOWN THE L ENG AND WENT OUTSIDE TO INSPECT NOSE GEAR. I NOTICED NOTHING WRONG; NOT EVEN A FLAT TIRE. I HAVE OVER 2000 HRS IN THIS ACFT AND I'VE EXPERIENCED THIS BEFORE AS SIMPLY A SLIGHTLY LOOSE SHIMMY DAMPER THAT OCCURS ON A LOT OF ACFT THAT HAVE MANY HRS OF USAGE. WE DISCUSSED THE PROB AND THE FO AND MYSELF DECIDED THAT IT WAS SAFE TO CONTINUE AND WE TOOK OFF WITHOUT FURTHER INCIDENT. UPON REACHING OUR DEST; MAINT MET THE ACFT. THEY CONFIRMED THAT THERE WAS NOTHING WRONG. THEY DID CHANGE NOSEWHEEL TIRES THOUGH TO POSSIBLY CORRECT A BAD TIRE WITH INNER SEPARATION. I DID NOT WRITE UP THE ABORT IN THE MAINT LOGBOOK NOR TALK WITH MAINT PRIOR TO TKOF BECAUSE I'VE HAD SEVERAL SIMILAR OCCURRENCES BEFORE AND FELT THAT IT DID NOT WARRANT FURTHER INVESTIGATION. I ASKED THE MECH IF HE WANTED ME TO WRITE IT UP AND HE REPLIED IT DIDN'T MATTER; IT WAS SOMETHING SIMPLE AND NOT TO WORRY ABOUT IT SO I DIDN'T.