You will feel a very very big difference in grip and drive and u won't like it,kept even 185 on Mira and didn't feel much difference however the drive and grip was excellent, The Car even had alloys, then kept a Mira with stock tires and steel rims and hated the drive, no grip, no pleasure, so the low fuel consumption is worth the pleasure,
i am not sure but i guess jinyu make loader tires, for ravi, etc, not sure though,
Dont go for chinese stuff, look for something branded, or try NanKang, they r very good and soft tires, with beautiful thread design