The tires on my Auster are Goodyear (British made) and are branded as “Conducting”. The tyres on the Gemini are Dunlop Elektra. Many years ago (Too many) I was informed by one of my Mentors that static straps were no longer needed as both these types of tyres/tires were conducting, and would have dissipated any static buildup on landing. As an aside our Yak 52 has a trailing static discharge cable attached to the rh side of the nosewheel. After 57 years of refueling, jumping in and out of metal, wood, fabric and now composite a/c ,i have never been “Zapped’ except as crew in the DC8 days we were often “hit” by the doorknob on the forward lh toilet door!!!