function start()
    setPedCanBeKnockedOffBike(getLocalPlayer(), false)
    addEventHandler("onClientPlayerVehicleEnter", getLocalPlayer(), addGravityFinder)
    addEventHandler("onClientPlayerVehicleExit", getLocalPlayer(), removeGravityFinder)
end

function addGravityFinder(veh)
    addEventHandler("onClientRender", getRootElement(), magnetWheels)
    setElementHealth(veh, 1000)
end

function removeGravityFinder()
    removeEventHandler("onClientRender", getRootElement(), magnetWheels)
end

function magnetWheels()
    local veh = getPedOccupiedVehicle(getLocalPlayer())
    local x, y, z = getElementPosition(veh)
    local underx, undery, underz = getPositionUnderTheElement(veh)
    setVehicleGravity(veh, underx - x, undery - y, underz - z)
end