17 u get grip... 16 u get power..17 mkn minyak like hell for 1.6...stay wit 16 lar...better still add some bodykit go down to 15" u get power and grip with nthe rite performance tyres... i reconment.. Advan Noeva AD 07, Falken Azenis RT 215, or Bridegestone Potenza SO3 or SO2