Just for fun: what do you think would win a slow speed coast-down test, all else being equal:
- four Bridgestone Potenza RE92 LRR tires @ 51 psi (OEM tire installed on the first-generation Honda Insight)
... or ...
- four Goodyear space saver spare tires @ 70 psi (OEM donut provided with 1991-2008 Metros, Fireflies & Swifts.)
Today I did a comparison of the rolling performance of
all the different tires in my expanding Suzukiclone fleet. I tested everything at 51 psi on one car (the ForkenSwift) in repeated coast-downs. (My life is so exciting. )
For kicks, I also threw the spare tires into the shoot-out, testing at both 51 & 70 psi (sidewall says: "inflate to 60 psi"). Why? Because these wee tires seem to regularly find their way into discussions about RR, wheel/tire aero & weight... sometimes in a speculative, hopeful way.
I will say this: I was surprised.
Will post the details/results tomorrow!
