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Old 10-17-2019, 02:05 PM   #8 (permalink)
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Blackfly - '98 Geo Metro
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Originally Posted by ennored View Post
how about 4 mini spares to lower the rolling resistance. Should be nearly free and maybe net some decent gains
Just for fun, I tested 4 space-savers at 70 PSI (above the rating), and they still performed HORRIBLY in terms of rolling resistance. Worse than any other tire I tested that day:

Thread: Testing rolling resistance of the Various Tires of the Suzukiclone Fleet (RE92 wins)

Obviously I'm not saying the same thing will happen with every brand of space-saver tire, but it does show it's not safe to assume a happy & efficient improvement.
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
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