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25 vs 35 chain
According to the Diamond Chain web site, 35 is 2.5 times heavier than 25. 35 is about .21 pounds per foot.
25 should be quite strong enough, but the connecting link is always the weakest. In addition, #35 sprockets are quite widely available, and very cheap. If you are using the larger bore sizes like 5/8, it's a lot easier to find standard parts. Using aluminum #35 sprockets can offset some weight gains. Search the web on go-kart, Azusa and go-ped for various parts which may be adaptable. (Aftermarket Go-Ped wheels are awesome!)
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Richard Linn
Proud father of Marine LCpl. Karl R. Linn
Co-founder Team 975
KIA, Iraq 1/26/2005
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