I didn't read Mike's comment
that way at all Papa - I read it to mean that
until they tried electric lights, oil lamp users thought their lamps were great, cos they didn't know any better; inferring that
until they try 'proper' car tires, Kenda users will think the Kendas are great too, cos they don't know any better! 
As for the tire formula & the lower pressures that are recommended here when using car tires under our '
much lighter than your average car' Spyders, that formula isn't used "
get the same hight tire (making it narrower or wider), then running half the air pressure that is recommended so it will ride better", it's basically just an '
easier for most to use' & a repeatable/fine-tunable version of the fairly complex formula that tire developers/designers use to work out the pressures they recommend for any pneumatic tires when they're used on a given vehicle, including under those heavier cars, heavy transport trucks, other lightweight vehicles running pneumatic tires, and even under motorcycles - the result varies according to the load imposed... So since it works pretty well for all those other vehicles & the range of loads they impose upon their tires, it only stands to reason that it
still applies for the lighter loads that Spyders place upon their tires too, with the capability of checking & adjusting if/when the operator is so inclined &/or conditions change....
But, once you buy them, they are
your tires, & it's
your Spyder, so you can do whatever you will with them.... but it does seem a little odd to me that you'll happily use the formula derived recommended pressures in the tires you've got fitted on your car, but you'll balk at using the same basic formula to optimise the ride, handling, traction, & tire life et al in any car tires you might want to fit to your Spyder?!? :dontknow:
But like I said, they're your tires, & it's your Spyder..... :thumbup:
