where to buy 24x1.95 black knobby tires ?

[brian]

I know it's been mentioned already, but it's important:

Check the ETRTO sizes on all tires you buy. ETRTO sizes are the only size numbers you should be looking at.
520 and 540 (and apparently 507) diameter rims are all called "24 inch".

[NoobisMaximus]

thanks for the tips guys