Cane Creek GXC Stem - 70mm 31.8 Clamp +/-6 1 1/8" 30th Anniversary BlueCane Creek GXC Stem 70mm 31. 8 Clamp + 6 1 1 8" 30th Anniversary Blue. The GXC is an impressively lightweight rigid stem that has a high polish finish and is remarkably affordable. It matches the overall size shape and proportions of modern gravel and cross country bikes while maintaining a tasteful amount of traditional appeal. The GXC stem is an easy way to improve your bikes look while reducing weight. Forged and machined 6066 aluminum alloy