I have just fitted a standard 18” GR Sport alloy as a spare wheel to my 2021 TS GR Sport. I am not a fan of space saver wheels and I think the kit that squirts stuff into the punctured tyre has limited success hence my desire for a proper spare. There is a wheel well in the back which takes the wheel (18”) with tyre fitted no problem.    I am just posting in case anyone else is thinking about fitting a proper spare and wondering if it is possible.