Zipp: When Zipp Introduced The 900 They Changed Expectations For Disc Wheels. Zipp Demonstrated That Discs Didn't Have To Weigh As Much As A Small Dog While Offering The Stiffness Necessary To Perform Under The World's Greatest Cyclists. At Just 935 G With A Cassette Hub, The 900 Is Light Enough For The Hilliest Triathlon Or Time Trial Courses. The Zipp 900 Disc Remains One Of The Lightest, Stiffest Disc Wheels In The World & Was Still More Than Fast Enough To Help American Cycling Legend Kristin Armstrong To Time Trial Victories Galore. Zipp Was Founded 20 Years Ago To Produce Carbon Fiber Discs That Were Lighter & Faster Than Anything Else Available At The Time. Today, The 900 Still Reflects That Commitment To Giving You The Perfect Tool For Whatever Situation You Find Yourself In. This Disc May Also Be Adapted For Track Use. Available In The Stealthy Matte Black Or Distinctive Matte White Decal Options.