Hello
Most 901/902 have the "X" gear as highest. This is a 24 x 28. This setup will have 100 km/h at 3000/min and 200 km/h at 6000/min.
The 195/60/15 are low profil and will roll less for rev. Typical rolldiameter is around 1875 mm
Stock is 165/82/15 or 185/70/15 with is 1950 mm per turn.
If you change to 205/70/15 on the rear you make 2050 per turn. This will give something like 220 km/h at 6000/min.
Rerquarding the american streets and your background ( cheap fast power ) together with the small brakes the 120 mph are good enough for most races especially if you hit them after 15 secounds.
grüsse
BTW you will find a trany chart in the tech section. Postet by Warren S as exxel files.
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