Need help with the speed on my board

Hello there guys. Semi-noob here. I have built myself a 10s3p electric longboard and it’s been working nicely for a while but the speed for it refuses to go higher than about 10km and I have not changed any settings for the board. Any ideas as to what this could be would be greatly appreciated. Thanks.

We need: Wheel size Gearing Do you use BMS? Post pictures of the board

We kind of need everything to be honest. As Roman says a whole lot more info is needed before help can be attained.