(adsbygoogle = window.adsbygoogle || []).push({}); If I add them to my parts list using Slim's 1.3.1 tool, will I be able to install them normally in the game or will I have to hex them onto my car?

you can install them in game. just like the other parts.

Cheers for the quick reply Don. I've got a few cars that can definitely benefit from incredibly sticky tires.

your welcome but don't get your hopes up. i tested them on the Nür and theyre is not mutch differents.
i have a GTR stealth that is set up for the Nür. i first did a 5 laps with race tyres and 5 laps with super softs.
theyre is just a litlle differents in cornering. don't expect to mutch.

also when you fit the tyres and go online, when people chech witch tyres you fitted, they see racing hard tyres, not the racing super soft.