Gearing?

[sime46]

Just wondering what the experianced guys may suggest for my LRP s8bxe team car? Its on an lrp 2800kv motor running 4s. Its as box I think, but thats not always the right way I'm finding. Thanks chaps. Also, could anyone point me in the right direction for connectors for my battery/speedo please? The battery has the big red one peice plug with what appears to be a male and female inside. Where can I purchase some more to get this show on the road/track, prefferably uk if poss. Thanks again.