Which Tubs?

I thought one of the main reasons that tubs are used on the track is for safety. If you have a puncture, Clinchers are prone to coming away from the rim. Tubs will give you more control just after a puncture as they stay on the rim and deflate slower.

Main reasons for using tubs are better handling and less rolling resistance.

A good track tub can be pumped to over 15bar. At that pressure the tub is perfectly round. A clincher is never round, it's always egg shaped (taller in the middle)...

Good tubs also have higher thead counts so the body of the tub is more flexible meaning that any small bumb, stone, grit has very little affect on the tub making contact with the track.

At 135gram all included tub are way lighter than any clicher and so more responsive (less turning weight = faster acceleration)

:-)