now the cold has come my rib is sitting waiting for the warm weather to come back. the tubes have lost a bit of air over the last month and have gone soft (not fully deflaited). can i leave them like this or should i keep topping them up over the winter months????
It's not so much that they've lost air, it's more to do with cold air shrinking in volume. As soon as it warms up again, they should be back to the same firmness as before. Boyle's law says pressure = volume x temperature. Halve the temp and the pressure also halves.