Tyres

[Oversize]

FYI going by the GVM (not the placard) the minimum load rating is 91 & the speed rating based on a 260kmh top speed is W or Y. In practical terms a speed rating of S (180kmh) is more than enough however your insurance may disagree

 

[Oversize]

Personally I’d prefer a higher speed rating than load rating, since you’re never likely to exceed the load.

Honestly, unless your tyre blows due to exceeding speed or load, then I’d challenge any denied insurance claim.

 

[Patrick_R]

205mm wide is fairly common but the 6.9 needs 215mm as a minimum. My preference would be 225/65R14. I just have to find a tyre which also suits minimum load & speed ratings according to the placard

Just be careful not to fit too wide a tyre to the rim, otherwise there may be too much flex in the sidewall that produces friction and heat.

 

[Oversize]

235 is still ok on a 6.5” rim however the rolling diameter is too small at 638mm vs the std 658mm (more than 15mm). So it seems the only choice is 215 or 225

 

[Patrick_R]

Speedos can be checked by tyre rotation/km. The tyre sites usually have this info as well.

 

[Oversize]

The 215/70R14 Michelins are now $850ea. Apparently made specifically for the 6.9

 

[Patrick_R]

What is so special about the 6.9 that requires specialised tyres Mark?

 

[Oversize]

What is so special about the 6.9 that requires specialised tyres Mark?

Speed & load rating, plus unique size. Of course you could replace the wheels with a larger diameter & more tyre choices. This option is likely to be cheaper too. Wider tyres will perform better if you stick with a quality brand. However the originality of the car will be affected, which will clearly affect resale. At the very least, keep the original wheels for a prospective new owner.

Bear in mind even 16” tyres are apparently becoming harder to find in the appropriate sizes.

 

[Patrick_R]

Thanks for clarifying this mate, understood.
Fun fact.
Australian trucks now have new 2025 ADR‘s about safety systems and stability control, so the government knows these systems are weighty, so we are now allowed to go to 7000kg (from 6500kg), on the 2 steer tyres tyres. (or front axle) To carry the extra weight, we now have to run 315 tyres on the steer, so nice and wide lol.

 

[c107]

The 215/70R14 Michelins are now $850ea. Apparently made specifically for the 6.9

I think there is a Ferrari that uses this size too?

 

[Patrick_R]

truck tyres are cheaper