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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tyres - blowouts, causes and how to avoid them?
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<blockquote data-quote="b'knighted" data-source="post: 6301" data-attributes="member: 59"><p><strong>Security bolts or tubeless tyres!</strong></p><p></p><p>Many moons ago, on my first visit to the West Country at the start of a three week touring holiday, two up with panniers, top box, chin high tank bags and camping gear on the tops of panniers and top box, I had a scary incident on the B’knight. It was on an A road and, having followed a convoy of articulated lorries for miles, I blasted past the first of them and was in the gap between them when the rear tyre blew out. I managed to leave the road in a straight line as the road curved right. </p><p>To quote a friend “ That was when I discovered that adrenaline was brown”. </p><p>I happily concur with Simon’s analysis of low pressure causing the tube to rub on the tyre and along with excess weight on the tyre and hot weather causing the tube to overheat and fail.</p><p> I had always believed the major part of the problem to be the lack of security bolts allowing the wheel to turn inside the tyre and rip out the valve once the tyre had partially deflated, causing a sudden loss of all remaining air. </p><p>The bike was transported home and we restarted the holiday by car. When I got back home I started work on the cast aluminium wheel that now carries my rear tubeless tyre. It is great what you can hide under the cowlings. On one occasion I realised that my rear tyre was too soft and before inflating it, checked and found that the pressure was down to 8psi without causing any dangerous incidents. It is really sad that it is so easy to neglect things under the cowlings! </p><p>Even with the best maintenance a puncture may occur while riding. As the tyre deflates there is the risk of the wheel rotating in the tyre and ripping out the valve, however well secured, especially in the wet. I have had that happen on my Comet. </p><p>With a tubed tyre I really think that the security bolts are essential. </p><p>Would the factory have fitted them otherwise?</p></blockquote><p></p>
[QUOTE="b'knighted, post: 6301, member: 59"] [b]Security bolts or tubeless tyres![/b] Many moons ago, on my first visit to the West Country at the start of a three week touring holiday, two up with panniers, top box, chin high tank bags and camping gear on the tops of panniers and top box, I had a scary incident on the B’knight. It was on an A road and, having followed a convoy of articulated lorries for miles, I blasted past the first of them and was in the gap between them when the rear tyre blew out. I managed to leave the road in a straight line as the road curved right. To quote a friend “ That was when I discovered that adrenaline was brown”. I happily concur with Simon’s analysis of low pressure causing the tube to rub on the tyre and along with excess weight on the tyre and hot weather causing the tube to overheat and fail. I had always believed the major part of the problem to be the lack of security bolts allowing the wheel to turn inside the tyre and rip out the valve once the tyre had partially deflated, causing a sudden loss of all remaining air. The bike was transported home and we restarted the holiday by car. When I got back home I started work on the cast aluminium wheel that now carries my rear tubeless tyre. It is great what you can hide under the cowlings. On one occasion I realised that my rear tyre was too soft and before inflating it, checked and found that the pressure was down to 8psi without causing any dangerous incidents. It is really sad that it is so easy to neglect things under the cowlings! Even with the best maintenance a puncture may occur while riding. As the tyre deflates there is the risk of the wheel rotating in the tyre and ripping out the valve, however well secured, especially in the wet. I have had that happen on my Comet. With a tubed tyre I really think that the security bolts are essential. Would the factory have fitted them otherwise? [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tyres - blowouts, causes and how to avoid them?
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