In my maruti car euro 2 60000 km 7 yrs i feel tremor which

In my maruti car euro 2 60000 km 7 yrs i feel tremor which somewhat reduces after speed increases in smooth road as well.i changed both the front tyres. mechanic told me that probably due to old back tyres or some rim problem. and despite changing battery some time ignition fails to start engine in one chance.exide people told there is no problem in chargin system.3 months 4000 km ago i changed engine oil and changed clutch plate.. please give me ur suggestion and valuable opinion.