Shop › Theory Bond Top stem Image 1 of 3 Image 2 of 3 Image 3 of 3 Theory Bond Top stem $29.00 Theory Bond Top Load Stem is made of cold forged 6061 aluminum with a 50mm reach. Color: Select Color Black Purple Blue Red Quantity: Add To Cart Added! Theory Bond Top Load Stem is made of cold forged 6061 aluminum with a 50mm reach.