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Everything Else (Not Vincent Related)
1938 Rudge Race Bike
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<blockquote data-quote="Nulli Secundus" data-source="post: 106689" data-attributes="member: 560"><p>Thanks Greg for your valued input on this. Yes the dreaded speed wobble is indeed an ongoing issue for me whilst racing this bike. I completely agree that the 21 inch front wheel does not look right and makes the front end high. I do not know why the previous owner and builder of this bike went for a 21" front, which to me looks like a bicycle tyre, when 1938 Rudge Specials and Sports Specials had 19" wheels all round.</p><p></p><p>The 1938 Ulster, which this is not, had a 21" front and 20" rear. So why did he almost copy that when a rear 20" precluded racing? Maybe the Ulster had fine steering? </p><p></p><p>I have a 19" front wheel with an alloy rim. This is illegal, but that does not seem to stop others fitting them in the Girder Fork class. The problem is it is a replica hub made of alloy, with shrunk in brake drum and I think metric bearings. My wheel spindle will not fit it and I do not have the means to make one.</p><p></p><p>I have been chatting with davidd and his advice is great. From this I am thinking that I am partly responsible for the wobbles. In my first race, I followed the advice of the previous owner and sat further back and lent over the tank. I also followed advice from BigEd and did what his brother Peter did when racing a Sunbeam, which was locking my knees on the tank and my elbows against my knees. The bike behaved admirably, but even though I was convinced I was faster, the lap times proved otherwise. I think in other races I must of failed to nail this riding technique. Perhaps because of on track distractions, or physical capabilities. </p><p></p><p>At the end of the day though it would be preferable if the bike handled better.</p><p></p><p>Whist I consider Gerrards as my nemesis corner, in previous years I have had worse wobbles at the Esses, when the bike seemed to be leaping sideways towards the kerb and bucked me off the saddle. My inside left leg kept me hooked on in a sort of Randy Mamola esque style. So the good news is, my changed riding position suited not only the Esses, but also it was better coming out of the Bus Stop chicane and heading for the start/finish straight, where it had wobbled before.</p><p></p><p>Please keep the advice, suggestions and theories coming.</p><p></p><p>Cheers </p><p></p><p>David</p></blockquote><p></p>
[QUOTE="Nulli Secundus, post: 106689, member: 560"] Thanks Greg for your valued input on this. Yes the dreaded speed wobble is indeed an ongoing issue for me whilst racing this bike. I completely agree that the 21 inch front wheel does not look right and makes the front end high. I do not know why the previous owner and builder of this bike went for a 21" front, which to me looks like a bicycle tyre, when 1938 Rudge Specials and Sports Specials had 19" wheels all round. The 1938 Ulster, which this is not, had a 21" front and 20" rear. So why did he almost copy that when a rear 20" precluded racing? Maybe the Ulster had fine steering? I have a 19" front wheel with an alloy rim. This is illegal, but that does not seem to stop others fitting them in the Girder Fork class. The problem is it is a replica hub made of alloy, with shrunk in brake drum and I think metric bearings. My wheel spindle will not fit it and I do not have the means to make one. I have been chatting with davidd and his advice is great. From this I am thinking that I am partly responsible for the wobbles. In my first race, I followed the advice of the previous owner and sat further back and lent over the tank. I also followed advice from BigEd and did what his brother Peter did when racing a Sunbeam, which was locking my knees on the tank and my elbows against my knees. The bike behaved admirably, but even though I was convinced I was faster, the lap times proved otherwise. I think in other races I must of failed to nail this riding technique. Perhaps because of on track distractions, or physical capabilities. At the end of the day though it would be preferable if the bike handled better. Whist I consider Gerrards as my nemesis corner, in previous years I have had worse wobbles at the Esses, when the bike seemed to be leaping sideways towards the kerb and bucked me off the saddle. My inside left leg kept me hooked on in a sort of Randy Mamola esque style. So the good news is, my changed riding position suited not only the Esses, but also it was better coming out of the Bus Stop chicane and heading for the start/finish straight, where it had wobbled before. Please keep the advice, suggestions and theories coming. Cheers David [/QUOTE]
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1938 Rudge Race Bike
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