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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Avon Roadrider for Comet
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<blockquote data-quote="Matty" data-source="post: 111750" data-attributes="member: 1339"><p>Well this is most encouraging and I shall fit standard Michelin tubes.</p><p>The 100x90x19 looks a little narrower than a 350 x19 and I am thinking of fitting a 325x19 tube, are there any thoughts on this.</p><p>Having a 300x20 AVON Speed master front for which no tubes are now available I have been advised to use a 300x21 tube now having previously used 325x19 tubes - this seems to be OK.</p><p>However some time ago I laid a genuine 300x20 tube on top of a 325x19 one and could not see any difference, hence the reason I had been using 325x19 tubes in the front for some years !! Being somewhat cynical I wondered if they were in fact the same with different markings.</p><p>The main moan I have however is that all the new tubes I have bought recently lose pressure at the rate of about 5lbs a week, so I have to blow up the tyres every time I use one of the bikes.</p><p>I can not find any leaks so the air must be leaking through the whole fabric of the tube.</p><p>I am 83 now and nipped the tube putting the new tyre on because I am not strong or agile enough to put the tyre on now by hand and foot only and had to use levers which is fatal !!</p><p>Matty</p></blockquote><p></p>
[QUOTE="Matty, post: 111750, member: 1339"] Well this is most encouraging and I shall fit standard Michelin tubes. The 100x90x19 looks a little narrower than a 350 x19 and I am thinking of fitting a 325x19 tube, are there any thoughts on this. Having a 300x20 AVON Speed master front for which no tubes are now available I have been advised to use a 300x21 tube now having previously used 325x19 tubes - this seems to be OK. However some time ago I laid a genuine 300x20 tube on top of a 325x19 one and could not see any difference, hence the reason I had been using 325x19 tubes in the front for some years !! Being somewhat cynical I wondered if they were in fact the same with different markings. The main moan I have however is that all the new tubes I have bought recently lose pressure at the rate of about 5lbs a week, so I have to blow up the tyres every time I use one of the bikes. I can not find any leaks so the air must be leaking through the whole fabric of the tube. I am 83 now and nipped the tube putting the new tyre on because I am not strong or agile enough to put the tyre on now by hand and foot only and had to use levers which is fatal !! Matty [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Avon Roadrider for Comet
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