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with my mods so far i can see where i may need to go up to 14" and LLR tires to improve the gearing.. as of now it so easly drives at hiway speeds with its stock 13" 165's, once there worn out ill go to 155's but there is only like .08 difference in size on those.. not much or a end gearing difference.. the next logical step would be a bigger rim.. well see what the areo mods bring, the latest mode made a pretty big difference on the vacuum gauge, I was expecting very little change..
the one other thing i saw is some one found 135-13's but didnt see the over all tire height.. if there the same as the stock 165-70's that would provide the biggest improvemnt in MPG.. its been well documented that tire width makes a big impace.. however can cause some negative handling problems if the cars to heavy for the tire size, but considering I'm in a CRX thats the weight of a geo and they had those little 12" tires i thing i could pull off 135's safely.
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