I am trying to buy continental bike tube - 700 x 25, but the size change to 700 x 32-42 pv on the cart. why?

I found the same problem and had to buy it from a different source in order to be sure I was getting the correct size. It’s an amazon problem.

Is this 650cc or 700cc? The name says 650 but the picture shows 700

It is 650cc. Bought to install on my older SCOTT road bike.

Will it fit a 25x700c tire?

Yes. I just put these in my 25x700 and they fit.

will this work on a trek fx3? I'm confused about the length of the valve for this bike? 42mm OK or longer?

This has nothing to do with the bike but rather with the wheel or more specifically with depth of the wheel. If you wheel is X mm deep you will need at least X +15 mm long valve. Example: you wheel rim is 25mm deep. You will want tube with at least 40mm valve. Longer is OK but at some point it will impair the aesthetics.

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€ 37.91

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚴‍♂️ Ride Elite, Stay Inflated: The Tube That Champions Trust

100 QUALITY ASSURANCE - Every tube undergoes rigorous inspection, guaranteeing premium performance on every ride.
LIGHTWEIGHT RELIABLE - Shed grams without sacrificing strength—perfect for deep profile rims and serious cyclists.
PRECISION VALVE CONTROL - 42mm Presta valve with removable core lets you customize with extenders or sealants effortlessly.
CHAMPION GRADE DURABILITY - Seamless, vulcanized construction ensures uniform roundness and valve reliability—ride with confidence.
UNIVERSAL FIT FLEXIBILITY - Unitube system supports a broad range of tire sizes, reducing the need for multiple tubes.

The Continental 42mm Presta Valve Tube is a premium, vulcanized inner tube designed for mountain and road bikes with 25-32mm tire widths. Featuring a seamless construction for enhanced durability, a removable valve core for customization, and the innovative Unitube system for broad tire compatibility, it undergoes 100% quality control to ensure reliable, lightweight performance favored by professional riders worldwide.

Specifications

ASIN	B008ZTM95C
Best Sellers Rank	#30,186 in Sporting Goods ( See Top 100 in Sporting Goods ) #149 in Bike Tubes
Bike Type	Mountain Bike
Brand Name	Continental
Compatible Tire Width Maximum	32 Millimeters
Compatible Tire Width Minimum	25 Centimeters
Customer Reviews	4.5 4.5 out of 5 stars (5,453)
EU Spare Part Availability Duration	2 Years
Global Trade Identification Number	04019238556858
Included Components	no
Item Diameter	700 Millimeters
Item Type Name	Continental R28 Training Presta Inner Tube - Black, 700C x 25 - 32 C/42mm
Item Weight	4.94 Ounces
Item Width	25 Millimeters
Manufacturer	Continental
Manufacturer Part Number	TUC81921
Material Type	Butyl Rubber
Model Number	0181921
Size	700 x 25-32 - 42mm Presta Valve
Unit Count	1 Count
Valve Length	42 Millimeters
Valve Type	Presta
Wheel Size	26 Inches

Reviews

M**I

Bad tube.. puncher in few kilometres

2.06.2020

N**.

Super.

27.12.2025

K**Y

All good

3.12.2018

C**G

Good quality, fit to my kids 650 wiggins

2.01.2026

R**O

Siempre me ha transmitido confianza esta marca, que en neumáticos de coche es de las más caras y con más prestigio y en este tipo de cámaras de bicicleta es de las más baratas, pero su marca es una garantía

20.10.2017

K**I

Item delivered timely and in good condition. Very easy to install. Seems to be of good quality for the price! I have used Continental Tires and tubes on other bikes as well and been quite satisfied. Longevity, we’ll have to see, but so far so good. I highly recommend these tubes.

21.06.2022

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€ 37.91

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

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