Excel Sports Boulder is offering Zipp wheels for demo. The charge is $49.95 a day for front wheels and $59.95 a day for rear wheels per day (whether wheels are ridden or not). Most of the demos are done locally through our Boulder, Colorado showroom (303-444-6737), but we can ship if desired. Shipping transit time is not counted toward days used. 100% of daily use fees can be put toward new wheel purchase and new wheels will ship free of any shipping charge including a label to return demo wheels. If new wheels are not purchased, paid return shipping is not provided. This wheel is outfitted with a Continental Grand Prix 4000 tubular tire and Dura-Ace 12-27 cassette.
The 2011 Zipp 404 tubular features the new Firecrest rim shape that delivers more speed and better crosswind stability over the previous 404. Zipp discovered making the rim wider at 27mm toward the spoke end better controls the airflow over the back half of the wheel making it 9 seconds faster in a 40km time trial over the previous 404. The Firecrest rim shape moves the center of pressure closer to the steering axis which noticeably reduces buffeting by crosswinds so you can relax and ride fast even in gusty winds. A quick peek at Zipp's drag comparison chart confirms no other wheel cuts through crosswinds as effectively as the 404 Firecrest.
Other benefits of the new rim shape include better lateral stiffness for improved acceleration and a more solid feeling when cornering. The rim's composite structure is designed to absorb impacts by flexing slightly outward - which gives you a comfortable ride and long-term durability.
Please note: carbon specific brake pads required