What does 700x38c mean on a bike tire?

700x38c is the size of your bicycle tire. 700 is the nominal diameter of the tire in millimeters. 38 is the width of the tire (as seen if you were looking at your bike from the front/back). C refers to the old French system of classifying wheels according to their Bead Seat Diameter.

How do I know if I have a Presta or Schrader valve?

The visual differences between the two are obvious, with the Presta (pictured above) being slimmer, lighter and having a lock nut to close that you can see on the top. Schrader valves are wider, more robust and have a spring mechanism on the inside to keep the valve closed, rather than a screwable top section.

How big is a 700x38c tire?

Here’s the quick answer: In basic terms, a 700x38c tire is approximately 27 1/2 inches by 1 1/2 inches (or 1.50 inches). Easy, yeah? Sadly, things aren’t always quite as simple when it comes to bicycle tires.

How wide is a 38C bike tire?

40mm
“The 38c (40mm) width is by far the most popular now, but things keep getting wider,” said Nathan Forbes, Schwalbe brand manager.

Why do I keep pinching tubes?

Pinch flats are caused when you ride into something that causes a sharp impact — a rock, railroad track or edge of a pothole are prime culprits. The impact compresses the tire so much that the tube is pinched between it and edges of the rim. The result is a tire that’s skittish and prone to chattering in turns.

How do you stop pinch punctures?

Fortunately, there are a few ways to prevent this kind of punctures from happening:

Make sure you have enough tyre pressure, especially in your rear tyre.
Picking your line.tf.
Maintaing your speed.
Equip your bike with 2-ply or 3-ply tyres.
Try wider rims.
Go tubeless.

What is Presta valve or Schrader valve?

A french design from around the 20’s, presta valves have a narrower diameter than schrader valves, meaning a smaller valve hole is necessary in the rim, and that means thinner, lighter, stronger wheels are possible. That’s why you’ll typically find presta valves on racing rides like our Road and Track Series.