The Zipp Service Course SL Stem beautifully balances weight savings and strength. The 100mm version tips the scales at just 125 grams thanks to a 3D-forged 7075 aluminum construction which also yields incredibly stiff performance and exceptional durability. Titanium bolts and a precise design process lighten the load even more while providing a sleek aesthetic that compliments today’s racing bikes and perfectly matches the rest of Zipp’s Service Course SL line.