Kim Hawtin wrote:

what am i looking at here? previous owner said they were
'high pressure fittings'... tires indicate to fill too 100psi

They're Presta valves. They're bog-standard on narrow-tyred bikes.

am i likely to be able to get tubes in the standard fitting,
same as on my MTB?

No. The diameter of the stem is narrower than that of a Schraede
valve (car-valve), so a Schraeder valve won't fit in the rim.

Many pumps are able to pump up either sort. Usually there's a piece o
plastic in the pump-head which can be reversed to fit either valve. Yo
can also get a little brass adapter from the bike shop, which will allo
you to pump up your Presta valve tyres with a service-station air hose
if that is your wish.

I advise you throw away your mountain bike and car and standardise o
Presta valves exclusively. They're clearly better for th
environment.

Regards,

Suz

--
suzyj