Tire valve stems?

[Kibokojoe]

What size are the tire valve stems on a 1989 535i?

[nizmainiac]

as far as i know there's only one size, as in diameter, however you can get long ones or short ones, but motorcycle tubless valves will fit, they're a bit fatter at the base, but with a bit tyre soap they do fit, i've got 4 for the next time i change my tyres, they're a lot shorter than the short car tubeless valves and look alot cooler

[Ross]

X2 for the shorties. Less weight to balance out as well.