I need inner tubes for these tires?

Not if you are installing them on tubeless wheels. They are tubeless tires I'm pretty sure.

Can i buy a single tire?

Yes, just find a listing that only sells the front or rear tire size you're looking for. Some friendly advice from a professional, it is recommended to replace both together for the best ride quality. I've personally found if I only do the rear, then I need a front when the rear is half worn, which begins the terrible cycle of riding with one decent tire and one worn tire the rest of the time you own the bike.

Good morning, don´t have the shipping information, such as shipping weight and volume?

I bough them with free shipping

what is the width size for front and rear i got front 120/70rz17 m/c w58 + 180/55zr17 m/c w73?

The front is a 120 which would be 120cm and the rear is a 180 which would be 180cm. The next number in the series is the aspect ratio. So the 70 would be a height that is 70% of the width of 120. Same as with the rear. The 55 would be the height of 55% of the width. The last number in series would be your rim diameter.

Brand	Continental
Size	120/70R17
Section Width	120 Millimeters
Load Capacity	804.7 Pounds
Tread Type	Asymmetrical
Maximum Pressure	42 Pound per Square Inch
Rim Width	17 Inches
Tire Diameter	17 inches
Item Diameter	23 Inches
Automotive Fit Type	Vehicle Specific Fit
Load Range	J
Vehicle Tire ISO Metric Size Description	120/70R17
Construction Type	Steel-belted
Manufacturer	Continental
Model	23 x 23 x 12 inches/ZR Speed Rating///
Item model number	Contimotion120180set
Is Discontinued By Manufacturer	No
Manufacturer Part Number	02550190000 02550200000
UTQG	400 AA A

Tire Front120/7017 180/5517

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