Hello, after my dealer on site over 2 years old (DOT 0810) wanted to turn on old Bridgestone Turanza ER 300, I ordered it on the internet and got it today. These have DOT 1911. Speaks about 1 year old. I don’t seem to be followed by luck. My question. Would you keep or send back tyres of this age? My biggest worry is hardening rubber. Loud tires after 2 years of driving I don’t necessarily want to have. Thank you in advance.