ContinentalCorsa Inner Tubes

Q: My bike tubes are 700x18x23 will the 20 x 25cc be a proper fit or should I try to find a 18 x 23cc?

If your tires are 700x23 or 700x25 which are typical on road bikes these will fit properly. I'm guessing your tubes say 700x18-23 which means they will properly fit tire widths from 18 to 23

Q: What is the length of the valve stem?

The valve stem is 42mm in length.

Q: Bike shop usually sells me 700c. Is there any difference?

yes. 700 is only the diameter of the tire. u need another number. this depends on the width of your tire. the thicker and wider the tire, the bigger the number. this number is usually found on the side of your tire. ei; 700x23(narrow), 700x38(wide)

Q: My first 2 valve cores came off when i unscrewed the presta adapter. what am i doing wrong? separately, what is the purpose of removable valve cores?

Came off? Presta adapter? It's pretty simple they are designed to be able to unscrew and tighten easily with your fingers to be able to fill with air and to also be able to easily deflate completely, normally their is no need to completely remove the valve. All tires pretty much have removable cores (valves) just the way they are made always have been, comes in handy if you have to replace or in the case of bicycle tires makes it easier to fill tire with sealant. So if you are saying cores came out when you hooked up an adapter makes me wonder what kind adapter you are talking about. Normal presta tire pump air adapter fittings would not do that as they are simply a rubber collar that fits over the valve and you flip a lever that tightens the seal, so if you are having a problem it is with your adapter

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ID del producto: 254789745

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Detalles

Brand
Continental
Valve Type
Presta
Material
Rubber
Bike Type
Mountain Bike
Wheel Size
28 Inches

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ContinentalCorsa Inner Tubes

Presupuesto

Brand	Continental
Valve Type	Presta
Material	Rubber
Bike Type	Mountain Bike
Wheel Size	28 Inches
Item Diameter	70 Centimeters
Global Trade Identification Number	04019238556780
Item Weight	0.22 Pounds
Manufacturer	Continental
Size	700 x 18-25 - 42mm Presta Valve
Item Package Dimensions L x W x H	5 x 3.23 x 1.26 inches
Package Weight	0.11 Kilograms
Item Dimensions LxWxH	5 x 3 x 2 inches
Brand Name	Continental
Country of Origin	China
Warranty Description	producer
Model Name	Bike Tube
Color	Black
Suggested Users	unisex
Number of Items	1
Part Number	C1501726
Model Year	2013
Style	Presta Valve
Included Components	Bike Tube
Sport Type	Cycling

My bike tubes are 700x18x23 will the 20 x 25cc be a proper fit or should I try to find a 18 x 23cc?

What is the length of the valve stem?

Bike shop usually sells me 700c. Is there any difference?

My first 2 valve cores came off when i unscrewed the presta adapter. what am i doing wrong? separately, what is the purpose of removable valve cores?

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