Thank you guys for your replies
Have you tried any other rubbers on it ? Apart from the ak 47.
Should I try the red one then or is there better recommendation ?
Is there something specific you are looking for? AK47 is a pretty standard and very good rubber. You're not going to find something that is such a big improvement on AK47.
Within Chinese bouncy rubbers, I think AK47 red is the best there is. Maybe Moon Speed 53 might be better.
But if you really need something better, you will have to pay 3 times more for German rubber. If AK47 is a 90, maybe some German rubbers are 95, so again, you can't expect it to be that much better. Just like the most expensive tire for your car is not going to be that much better than a budget tire for your normal drive.