Bicycle Tyre Cut-Resistant Layer Angled Orientation
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Solution Overview
Problem
Conventional road bike tires face a trade-off between reduced rolling resistance and adequate puncture protection due to the stiff material of cut-resistant fiber inserts, which negatively impact their performance.
Innovation Solution
The tire construction features cut-resistant fiber reinforcements arranged at an angle of 80-110 degrees relative to the circumferential direction, a narrower cut-resistant fiber layer, and a highly elastic damping rubber insert, optimizing rolling resistance and puncture protection while enhancing riding comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cut-resistant fiber insert is added to protect the tire from punctures, then puncture protection is improved, but rolling resistance increases due to the stiff material
Solution Approach 1:
The patent applies local quality by positioning the cut-resistant fiber insert only in specific lateral regions of the tire where puncture risks are highest, rather than covering the entire tire surface. This localized placement provides puncture protection where needed while minimizing the overall impact on rolling resistance. The fiber insert width is specifically controlled to be narrower than the tread width, creating a balanced solution between protection and performance.
Solution Approach 2:
The tire structure is segmented into different functional zones: a central tread area without fiber insert for optimal rolling resistance, and lateral edge areas with fiber insert for puncture protection. This segmentation allows each zone to perform its specific function optimally, resolving the contradiction between overall puncture protection and rolling resistance.
2Weight of moving object
If the fiber insert width is reduced to lower weight, then weight is reduced, but puncture protection coverage is limited
Solution Approach 1:
The patent applies local quality by positioning the cut-resistant fiber insert only in specific lateral regions of the tire where puncture risks are highest, rather than covering the entire tire surface. This localized placement provides puncture protection where needed while minimizing the overall impact on rolling resistance. The fiber insert width is specifically controlled to be narrower than the tread width, creating a balanced solution between protection and performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly reduces rolling resistance while maintaining high puncture protection and improving riding comfort, as demonstrated by tests, particularly benefiting road bike tires.
Implementation Method 1
a dampening rubber insert made of a highly elastic caoutchouc is arranged over the tire carcass
Implementation Method 2
dampening rubber insert Rebound 70-80 having a material thickness of between 0.2 and 2 mm
Implementation Method 3
the reinforcements of the cut-resistant layer consist of a liquid-spun polymer, in particular polyester polyacrylate. This type of reinforcement is characterized by a particularly high cut resistance
Data Source
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AI summary
The invention relates to a bicycle tyre. A puncture-resistant fibre layer (4) having a plurality of polymer, parallel running tyre reinforcing elements (12) is arranged between the tyre tread (2) and the tyre carcass. Said reinforcing elements (12) are arranged at an angle of between approximately 80 and 110 degrees with respect to the peripheral direction (13) of the bicycle tyre.