Hankook Ventus S1 Evo2 (K117)

Yes, you can switch to run flat tyres in place of the existing tubeless ones. However, make sure all the four tyres are of same category, and you are not mixing the normal tyres with the run flat ones. Because both the kind of tyres offer different capabilities.

Tyre upsize is not encouraged by the automakers as it disturbs the performance and fuel efficiency aspects of the vehicle. Considering the same if you are fine with it you can upsize with the 205/60 R15 tyres in place of the stocked 185/65 R15 tyres. For the 205/60 R15 tyre size you can pick tyre patterns between JK UX1, Hankook Optimo ME02, and Michelin Energy XM2 Plus.

The said stock tyre size of 235/75 R16 is one of the rare sizes. Currently, it is made available by a few tyre makers. However, if you are unable to find it in your city tyre market you can buy it online. You can choose the tyre patterns between MRF Wanderer Sport and Hankook Dynapro HP. Moreover, if you still find it difficult you can switch to 235/70 R16 tyre size, which will result in a negligible low in the ground clearance, and will also not affect the performance of the Rexton. In the 235/70 R16 you can choose between Apollo Apterra HP, Hankook Dynapro HP (RA23) and Yokohama Geolandar SUV G055.

For superior performance and better control under watery setups Silicon Dioxide (Silica) is used in most of the passenger car tyres . You can pick silica based compound tyre patterns between Falken Sincera 855, Hankook Optimo K715 and MRF ZVTS.

You can tyre patterns between Apollo Apterra AT2, Continental Conti Cross Contact AT and Hankook Dynapro AT-M (RF10).