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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Which is better? 20/21 or 19/20 rims? Cross 3 or cross 4 spokes lacing? pattern??
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<blockquote data-quote="Marcus Bowden" data-source="post: 83469" data-attributes="member: 3287"><p>Have just built another three wheels,two 21" rims a 2.1<strong>5 (WM3) & a 2.50 (WM4) Avon's higher limit </strong>for fronts, an 18" x 3.00 (WM5) rear, never fitted thess sizes before, fitting Avon Trailrider tyres , with communications with Central Wheel Components.</p><p>A few comments I didn't really understand, bedding in spokes !! and other things ?</p><p></p><p>LETTERS</p><p>Richard my handsome,</p><p> First wheel 21 x 2.15 spot as always.</p><p></p><p>Second wheel 21 x 2.50 spokes a tad on long side but have eight that are too long and thread bound</p><p></p><p>Third wheel 18 x 3.00 all spokes too short as more than one “D” (spoke dia) is protruding beyond the nipple. Also would it be better to have a “cross three” lace up as the outside spokes are having to be sprung inwards to fit nipple and binding on spoke flange also head of spoke on first spoke crossed. See first photo. Smaller diameter rims creating this problem.</p><p>Not sure of the advantages or disadvantages other than a x 4 is stronger as opposing spoke is in a straight line nearly !</p><p></p><p>SPOKES IN 21” RIM 9”5/8” or 245mm REQUIRE 8 at 238mm or 9”3/8”</p><p></p><p>SPOKES IN 18” RIM 7”7/8” or 200mm REQUIRE SET 205 mm or 8”1/16” OR 3 cross pattern please what ever the professionals think.</p><p>I would love a chat with one of your experienced builders if at all possible.</p><p>Look forward to hearing from phone 01503 262 175, or e-mail but need a call for card details,</p><p>Marcus.</p><p></p><p>Marcus</p><p></p><p>I have forwarded this to Richard to look into on Monday when he returns from his holiday.</p><p></p><p>A couple of points from the information that you have given and the pictures - with the 21 x 2.50 wheel - assuming this is now tensioned and trued correctly - it is not uncommon for odd spokes to come up long and need grinding off - this is more common with old wheels but we even see it with brand new wheels where you might get 1 wheel in a batch of 10 where using the exact same components the spokes will come up long and need grinding, so i would say that you are over egging the price trying to just replacing the odd spoke with shorter ones.</p><p></p><p>For the 18” wheel - from the photos you have not bedded the spokes into the hub correctly which will immediately increase the length, also there should not be an offset on a Vincent so not sure why you are looking to move it over 3/8”, but almost certainly the rim will not be drilled for an offset. If you do not bed the spokes correctly then they will come loose very quickly and lead to a collapsed wheel.</p><p></p><p>We are happy to make any length of spoke that you want and charge you accordingly if you wish to ignore all of the above.</p><p></p><p>Kind regards</p><p>Warren</p><p></p><p></p><p>[ATTACH=full]16629[/ATTACH]</p></blockquote><p></p>
[QUOTE="Marcus Bowden, post: 83469, member: 3287"] Have just built another three wheels,two 21" rims a 2.1[B]5 (WM3) & a 2.50 (WM4) Avon's higher limit [/B]for fronts, an 18" x 3.00 (WM5) rear, never fitted thess sizes before, fitting Avon Trailrider tyres , with communications with Central Wheel Components. A few comments I didn't really understand, bedding in spokes !! and other things ? LETTERS Richard my handsome, First wheel 21 x 2.15 spot as always. Second wheel 21 x 2.50 spokes a tad on long side but have eight that are too long and thread bound Third wheel 18 x 3.00 all spokes too short as more than one “D” (spoke dia) is protruding beyond the nipple. Also would it be better to have a “cross three” lace up as the outside spokes are having to be sprung inwards to fit nipple and binding on spoke flange also head of spoke on first spoke crossed. See first photo. Smaller diameter rims creating this problem. Not sure of the advantages or disadvantages other than a x 4 is stronger as opposing spoke is in a straight line nearly ! SPOKES IN 21” RIM 9”5/8” or 245mm REQUIRE 8 at 238mm or 9”3/8” SPOKES IN 18” RIM 7”7/8” or 200mm REQUIRE SET 205 mm or 8”1/16” OR 3 cross pattern please what ever the professionals think. I would love a chat with one of your experienced builders if at all possible. Look forward to hearing from phone 01503 262 175, or e-mail but need a call for card details, Marcus. Marcus I have forwarded this to Richard to look into on Monday when he returns from his holiday. A couple of points from the information that you have given and the pictures - with the 21 x 2.50 wheel - assuming this is now tensioned and trued correctly - it is not uncommon for odd spokes to come up long and need grinding off - this is more common with old wheels but we even see it with brand new wheels where you might get 1 wheel in a batch of 10 where using the exact same components the spokes will come up long and need grinding, so i would say that you are over egging the price trying to just replacing the odd spoke with shorter ones. For the 18” wheel - from the photos you have not bedded the spokes into the hub correctly which will immediately increase the length, also there should not be an offset on a Vincent so not sure why you are looking to move it over 3/8”, but almost certainly the rim will not be drilled for an offset. If you do not bed the spokes correctly then they will come loose very quickly and lead to a collapsed wheel. We are happy to make any length of spoke that you want and charge you accordingly if you wish to ignore all of the above. Kind regards Warren [ATTACH=full]16629[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Which is better? 20/21 or 19/20 rims? Cross 3 or cross 4 spokes lacing? pattern??
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