I don'tknow. But I do know that the Challenge rims are so, so much lighter than the OEM 360 rims. But be careful unlike normal alloy rims, the Challenge BBS cannot be patched and painted over if damaged. Have to send to a rim factory or a rim specialist. The normal body shop can't d it.chocodip said:thank you.....but do u know if the weight is the same base on 19"