Hi guys!
My rear tire run flat because the valve ripped out of the tube...
Now im trying to find a new tube, but i don't exactly know wich are the specefications the tube has got to have.
I only know 4.60 - 18. Now, 18 is 18 inch diameter, but what is the 4.60?
Now i found on a local store a Pirelli tube, but on its packaging it says something of 3.60 and 4.10.
That ois too small isn't it? I can't find another one though... Will it do for my tire?
There are also specs like 110/90 or 120/80 (but not on my tire) ... what does that mean?

Thanks for the answers,
el_loco