Tyres Bicycle

Conventional bike tyres and mountain bike tyres are "clincher" type, also known as "wire-on." They consist of an outer tyre with a u-shaped cross section, and a separate inner tube. The edges of the tyre hook over the edges of the rim, and air pressure holds everything in place.

The "bead" is the edge of the tyre. On most bicycle tyres, the beads consist of hoops of strong steel wire. The beads are what holds the  tyre onto the rim, and are, in a sense, the "backbones" of a cycling tyre.

Cloth fabric is woven between the two beads to form the body or "carcass" of the bike tyre. This is the heart of the tyre, the part that determines its shape. The vast majority of tyres use nylon cord, though some use other polyamides. The fabric threads don't interweave with crossing threads as with normal cloth, but are arranged in layers or "plies" of parallel threads. Each layer runs perpendicular to the next layer.

Once the fabric has been woven between the beads, and the tyre has its basic shape, it is coated with rubber. The rubber is mainly there to protect the fabric from damage, and has no structural importance.

The rubber that comes into contact with the ground is called the "tread." This area usually has thicker rubber than the "sidewalls" of the tyre, mainly for wear resistance. Most cycle tyres have some sort of 3-dimensional pattern moulded into the tread, which may or may not enhance traction.

Many bicycle tyres are "gumwalls" or "skinwalls." Gumwall bike tyres have tan sidewalls. This makes the sidewalls slightly more flexible, reducing rolling resistance. Skinwalls have either no rubber on the sidewalls, or a very thin layer. This, too is an attempt to make the sidewall more flexible and reduce rolling resistance.

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Tyre 26 X 2.1 Scorch

4584

Tyre 16 X 1.75 Nightwing

4588

Tyre 700 x 23C BLACK w/PP

4738

Tyre 700 x 23C Red/blk w/PP

4739

Tyre 700x23C Blue/blk w/PP

4740

Tyre 700x23C Grey/Blk w/PP

4741

Tyre 650 X 23c Black

4742

Tyre 26 X 2.6 Standard Side Wall

4743

Tyre 27 X 1 1/4 Speed Tread Skin Wall 90psi All Black

4748

Tyre 27 X 1 1/4 Speed Tread Gum Wall

4748GW

Tyre 28 X 1 1/2 (40-635) Black

4751

Tyre 27 X 1 1/4 Block Tread Skin Wall 90psi All Black

4752

Tyre 27x1 1/4 Gumwall 90psi

4752gw

Tyre 27 X 1 1/4 Block Tread Standard Wall 75psi All Black

4753

Tyre 27 X 1 1/4 Speed Tread Standard Wall 100psi All Black

4754

Tyre 27 X 1 1/4 Gum Wall Speed Tread

4754gw

Tyre 27 X 1 Speed Tread All Black

4755

Tyre 27 X 1 Speed Thread Black With Gum Wall

4755G/W

Tyre 27x1.3/8 black, Duro

4757

Tyre 27x11/4 Black W/whitewall

4758
4762-bike tyre

Tyre 700 X 25c For Racing Bikes 100psi Black

4762

Tyre 700 x 25c Black W/whitewall

4763

Tyre 700x35C all black, , w/ Label

4765

Tyre 700 X 35c Puncture Protection With Reflective Tape

4767

Tyre 700 X 35c Commuter/treaking Tread All Black

4768