just wondering what is the main difference between sf challenges and gram light 57? Both appear to have the same "look". Just wondering if one was more expensive, or if the durability/quality of the rim were the same. thanks for any help...drew

 

they look very different (imo) they are both high quality rims

 

While you may think they look the same, they are in fact very different. Gram Lights are extremely light high quality cast wheels, whereas the sf are forged. Please correct me if I'm wrong.