do then come with a Schrader valve? what size do I need for 27.5 x 2.8-3.0 tire?

They come with a presta valve and have a sizing chart on product description.

Can the 27.5 stretch to work in a 29in tire, like std tubes can?

I would imagine so. Haven’t needed to try it yet but I carry a 27.5” on my mullet bike so if I ever get a front flat I’ll get to test it out

Do you need a special pump to inflate?

Any pump for a presta valve... Or a regular pump for schrader valve with a presta adaptor.

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Specifications

Brand	Tubolito
Valve Type	Presta
Material	Synthetic
Bike Type	Mountain Bike
Wheel Size	700 Millimeters
Item Diameter	29 Inches
Compatible Tire Width Minimum	1.8 Inches
Valve Length	42 Millimeters
Global Trade Identification Number	09120077570389
Item Weight	91 Grams
Manufacturer	Tubolito
Size	26" / 27.5" / 29"
Compatible Tire Width Maximum	2.5 Inches
Item Package Dimensions L x W x H	3.66 x 2.99 x 1.85 inches
Package Weight	0.09 Kilograms
Item Dimensions LxWxH	6.11 x 2.87 x 2.03 inches
Brand Name	Tubolito
Warranty Description	No Warranty Applicable
Model Name	Mtb
Color	1
Suggested Users	unisex
Number of Items	1
Part Number	33000005
Model Year	2022
Style	27.5" / 29" X 1.8-2.5 Inch (Pack of 1)
Included Components	1 x inner tube
Sport Type	Cycling

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