When extension To the models GP-X1-track and GP-X1-race, Both when heating in the stack and when heating directly on the car, we recommend the use of side covers.
In the stack, the side covers between the tires prevent a "chimney effect", in which the warm air in the interior of the tire stack collects primarily in the upper area. This would mean that between bottom and top tire, different rim temperatures and air pressures would result.
When heating on the car, the side covers prevent the rim from cooling down and thus causing an unwanted drop in tire pressure.