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I'm shopping online for some new tires, and see that some models are sorted by folding and wire beads? What exactly does this mean, and do I need a special rim to support them?

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What is strange is this is in posts flagged for me and this is a post I don't think I have ever seen before. Am I supposed to do something? I don't see anything wrong with this post or answers. –  Blam Jun 21 at 9:47

2 Answers 2

up vote 10 down vote accepted

Folding versus wire refers to the material within the bead or 'edge' of each side of the tire. Foldable bead tires use kevlar in most cases (I think) and tires with each type are entirely compatible with the rim size that the tire is designed for (in the absence of a manufacturing defect). Folding bead tires have a few advantages (in my opinion):

  • Somewhat lighter
  • Easier to store (can be refolded by flattening the tire and folding it into a bundle)
  • Bead has more stretch to it, so mounting the tire is usually less difficult

For these advantages, you will probably pay more for a foldable bead tire when a tire model includes both options. Also, wire bead's also appear more often as the OEM tires on lower end bikes.

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I've found folding tires harder to mount (at least the first time) since the body of the tire is essentially flat and won't easily assume a tire-like (toroid) shape. I see no advantage unless you're a weight geek or need the foldable feature for touring. –  Daniel R Hicks Jun 7 at 11:20
    
Less stretch can also be an advantage. I have that the bead fail on some older foldable. –  Blam Jun 21 at 9:50

Sheldon Brown can show you how to fold a wire bead tire.

Grab the tire at 10 & 2 O'Clock and overlap your hands until you have an uneven-size figure eight. Then just grasp the large loop of the figure eight, twist and push it towards the middle of the eight until you have three loops. Just tie it up with a strap and toss it into a bag.

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