20.5-24.5mm Motorcycle Fork Stem Mount with Dedicated RAM Holder for iPhone 8 (sku 50487)20. 5 24. 5mm Motorcycle Fork Stem Mount with Dedicated RAM Holder for iPhone 8 (4. 7" screen) Holder; RAM Cradle holds iPhone 8 perfectly, so it will not accommodate an additional case or skin. Phone slides into the holder and is secured by the tag at the top of the phone. High strength composite Plastic Stem; Mount Fits Stems: 20. 5mm 24. 5mm (0. 81" 0. 96") Light weight made from Aluminium. Attaches easily to the steering head tube of fork stems.