Suziki Samurai 1.3 Santana (Linares)

Hello,… I have a question again: I have the standard tyres: 205//70R15 road profile upgraded. on: 195/80 R 15 4×4 Lassa Compentus” Stollenprofile Now the Suzi is higher, clear…..but can it also decrease the top speed? I come on straight track without wind times just at 100Km/h,…. The rev indicator shows me about 3000U/min. 1.3l 47KW carburetor engine Can all this be correct or is something wrong? Thanks already ,…. gruss guent he