One of my 10 yrs old boy been using 7.0 board with Independent 129 and Bones SPF Sonic wheels 53mm over a year. He is very small for his age, his hight is about 54" and weight is about 53 lbs. His brother just gave him deck size 8 and I think it is a bit on the big size for him but he said he like it and he just dropped in the bowl yesterday.
My questions are...

1. Should I get him new Independent truck size 139?

2. Should I get him a better wheels?

Any other advice is welcome.

Thank you,