Originally Posted by jerryman692
bigger bearing good for high speed ,smaller bearing good for high torque.
If you don't actually know, it's better not to say, than to give wrong information.
The larger the bearings, the more stress it can handle. The more stress it can handle, the stronger the spring you can use. Bigger is better, but don't forget that your gearbox needs to have bushing holes reamed to match the size.