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Open Track Racing
Looking for new light weight wheels
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<blockquote data-quote="David Hester" data-source="post: 9385435" data-attributes="member: 6794"><p>The dilemma I am seeing is the jump to <em><strong>18" adds a good amount of rotating weight,</strong></em> moves it into a larger diameter placement and the tires(if forced to buy new) and wheels are even more money Lose- Lose-Lose-lose-lose!</p><p>Good Points! ;-)</p><p>You only need enough wheel to clear your calipers.</p><p>I have 17" for track days and 18 stockers for DD. I can REALLY tell the difference on acelleration, braking, and turn in with the bigger wheels.</p><p>Plus the physics. Two wheels with the <em>same</em> weight, the larger diameter wheel is going to take more energy to get moving and then to stop or turn. Spokes and centers don't add a lot of extra weight between a 17 and an 18 " wheel, the rim does. Move that out an inch and it takes even more energy to change direction.</p><p>Try the weight on a string.</p><p>Swing a nut around on 12" of string. Let it out to 24" and feel the difference on the pull. All about levers.</p><p></p><p><strong>The Law of Levers</strong></p><p><strong>Force (F) multiplied by the length of the force arm (Af) is equal to the resistance (R) multiplied by the length of the resistance arm (Ar). This can be stated as follows:</strong></p><p><strong></strong></p><p><strong>F X Af = R X Ar</strong></p><p></p><p>Increase Ar increases F even if R remains the same.</p></blockquote><p></p>
[QUOTE="David Hester, post: 9385435, member: 6794"] The dilemma I am seeing is the jump to [I][B]18" adds a good amount of rotating weight,[/B][/I] moves it into a larger diameter placement and the tires(if forced to buy new) and wheels are even more money Lose- Lose-Lose-lose-lose! Good Points! ;-) You only need enough wheel to clear your calipers. I have 17" for track days and 18 stockers for DD. I can REALLY tell the difference on acelleration, braking, and turn in with the bigger wheels. Plus the physics. Two wheels with the [I]same[/I] weight, the larger diameter wheel is going to take more energy to get moving and then to stop or turn. Spokes and centers don't add a lot of extra weight between a 17 and an 18 " wheel, the rim does. Move that out an inch and it takes even more energy to change direction. Try the weight on a string. Swing a nut around on 12" of string. Let it out to 24" and feel the difference on the pull. All about levers. [B]The Law of Levers Force (F) multiplied by the length of the force arm (Af) is equal to the resistance (R) multiplied by the length of the resistance arm (Ar). This can be stated as follows: F X Af = R X Ar[/B] Increase Ar increases F even if R remains the same. [/QUOTE]
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Looking for new light weight wheels
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