These are the new 16mm diameter Ultimate Racing shock bladders compatible with major car brands such as: Mugen, Kyosho, Xray, Serpent, HB, Losi and others. The material with which they are manufactured and their interior design ensure the bladders keep their original shape and do not deform or crush under pressure. Thanks to this the rebound of the shock absorber remains constant and the performance of the car is much more consistent, even on the bumpiest tracks. The bladders affect a lot the rebound and the pack of the shock absorber, so affects a lot on the overall performance of the car, especially on bumpy conditions and jumps landing. Difference between the hard membrane UR1702 and the soft membrane UR1702-S: A softer bladder provides less pack and rebound while facilitating the car's roll when cornering. A harder bladder provides more pack and rebound while increasing the roll of the car during cornering. Soft bladders are recommended for bumpy or low grip tracks and hard bladders for smooth or high grip tracks.
