My bike has completed 55,000 kms and four times I have replaced rear and 3 times front tyre till yet. Though the stock tyre size is 100/80 but I'm using 120/80 right from the beginning as I don't like thin tyres.

Anyone can please suggest the best replacement for current tyres. I'm using mrf zapper C for rear and zapper FS for front but didn't want to continue them as they only lasted for 10000 kms.

Also is it possible to try 130/80 or 140/80 in this bike? I don't really mind reduced mileage and performance.