I had this problem a few yrs back with my Hyundai.I was a 100km from home and couldn't figure out the problem until I took it to a mechanic and it was the side wall of the rear tyre had canvas showing by the time I got home.They were cheap tyres,

If this has come on suddenly I would do a quick examination of the wheels and see if one of the wheel weights has flung off. The clean shiny spot on the wheel and or sticky tape with no weight on it is a dead give away.

Agreed. One test is to swap the front wheels with the rears. If the shaking felt in the steering wheel is diminished, then it's those wheel/tire combo is unbalanced. Perhaps a wheel weight fell off, or the tyre is damaged. Run your palm along the tire looking for bulges

Another possibility is the alignment is way off (which is unusual for a Sunny) -- this causes a shaking (shimmy) around 70-80 kph in many cars

Tires round and balanced? The suspension tends to respond strongest to an unbalanced wheel at around 60ish on most cars.

Hi Guys

I have ever Hardest Wobble in my b210at 65-70KMPH, car is almost uncontrollable and shakes like a roller coaster at this speed limit.
what should be checked ? any Idea

thanks
regards
sumith