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What's the perferred backspacing for 20's on a NBS ECSB? tire size?
 

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Burning Rubber
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some say 35, series, others say 45 series... there arent too many 40 series tires that will fit that wheel's width properly. I would say a 40 series sidewall tire with that size drop and rim.

I'd say that anywhere between a 245/40/20 and a 275/40/20
 
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