Posted by Vaughn [172.69.33.250] on Friday, August 21, 2020 at 16:12:05 :
In Reply to: Tubes and flaps posted by TerryD [172.69.34.47] on Friday, August 21, 2020 at 15:39:27 :
Bias tires are typically constructed of 4 plies that run at angles to each other and the body of the tire and cross each other. Radial tires have the belts at a 90-degree angle to the tire, and the belts overlap rather than cross each other. Radial tires have another belt, usually of steel cord, running around the tire under the tread. Radial construction allows the sidewall of the tire to flex under loads without affecting the contact of the tread with the road unlike a bias tire that flexes little. It is this flexing that requires you to use a radial tube in a radial tire. The tube is designed to handle the flexing without overheating as a bias tube would.
Tubeless tires have a considerably more robust construction than tube tires, which need the help of a tube of air to maintain sidewall stability and air pressure. If we put a tube into a tubeless tire, there will be huge amounts of friction between the side of the tube and the inner liner of the tire. With every rotation, the sidewall will flex and rub against the tube. Friction equals heat. Heat is the ultimate enemy of tires, especially sidewalls. They are the weakest point of construction.
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