There's a 12mm hex mounting in the wheels

PH00 is ideal if you have a tiny quadcopter or helicopter

use better batteries

Charge a Traxxas Powercell NiMh 3000mAh in a Charger LN3

Batterioplader PRO inkl. 4 batterier (2500mAh) HyperGo There's a 12mm hex mountingeneloop 2 hour battery charger including 4 eneloop PRO 2500mAh batteries. Rechargeable batteries are great for your wallet and the environment! Powerful battery charger with 4 of the best batteries. Can be recharged up to 500 times that's awesome! Rechargeable batteries are excellent in remote controlled cars. You get more power and really good runtime. eneloop PRO cells are the best you can get. Do not use rechargeables in the transmitter. eneloop is