Shock Absorber Type 644 WESA RearWESA After significant development, we combined Wilbers suspension with BMW ESA to deliver custom comfort and control. Choose standard height or up to 80 mm of lowering, with a setup matched to your weight and riding style and keep the convenience of ESA cockpit adjustments. Lowered Height: Due to side stand shortening, TV approval is required for registration in Germany. Product may vary from picture.