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By Andrew Juskaitis, VeloNews technical editor
We just received word from Zipp that the company has chosen to go ahead and “dimple” many of its popular carbon road wheels. In fact, everyone of its Deep-V wheelsets will receive what company says is a major aerodynamic enhancement.
“In every wind, speed and direction ZIPP’s dimpled wheels are more aerodynamic our same wheels without the dimples. In 90 percent of riding conditions the innovation will save you between 1 and 4 watts of energy,” Zipp claims.
“The aerodynamic benefit mimics the reason golf balls have dimples, aircraft wings and race cars use trip strips and vortex generators,” said company spokesman Bill Vance. “It’s also why tennis balls have fuzz. Essentially,the dimples create an energized layer of air allowing air to follow thecontours of the wheel, thus eliminating much of the low pressure wake,which is the source of 90 percent of wheel drag.”
So, which of Zipp’s wheels get the dimples?
404 series wheelsets: Z4 (Tubular), 404 (Tubby and Clincher), 404 Clydesdale (Tubby and Clincher), 404 (Pave/Cross) and 404 Track (Tubular). All the 404 sets include two Dimpled 58mm Deep-V section rims.606 series wheelsets: Z6 (Tubular), 606 (Tubby). Z6 and 606 wheelsets include one Dimpled 58mm Deep-V rim and one rear 82mm DimpledDeep-V rim.808 series wheelsets: Z8 (Tubular) 808 (Tubby). Include two 82mm Deep-V rims. Fastest Deep-V wheel set.909 wheelsets: Z9, 909 and 909 Clydesdale. Include 58mm Deep-V rim and Disc. Tubular only.999 wheelsets: Z99 and 999 wheel sets. Includes 82mm Deep-V rim and Disc. Claimed fastest wheelset on the market.
Cranking it up
I also received a call from Christina Orlandella of Crank Brothers who informed me the company had just put the finishing touches on its 2005 road sponsorship program.
“Our sponsored teams for 2005 include Davitamon-Lotto (Pro European RoadTeam which includes 2004 US Pro National Champion Fred Rodriguez ), Ofoto)/Sierra Nevada, Jittery Joe’s, Team Monex and Velo Bella,” she said.
And while that’s interesting, it turns out that Crank Brothers is taking advantage of the the opportunity by designing custom Quattro 4Ti pedals for each team. Each custom pedal features colors and graphics that represent the team’s bikes and kit.
“We originally made them just for the team bikes to show our commitment to the teams and athletes and to give the team bikes a custom look,” Orlandella noted. “We have now decided to offer them for sale to retailers.”
The $170 Quattro SL and $400 Quattro Ti “Pro Series” pedals will beavailable at retail in late February. They are the same price as the stockSL and 4Ti pedals. www.crankbrothers.com
A Call To (Small) Arms
I’d like to finish off this week’s column off with a request. The 2005 VeloNews Buyer’s Guide is going to feature a “Small Builders'” section where we hope to list the great majority of independent frame builders in the United States.
We already know that despite our best efforts, we’re going to miss a few of you out there. So, we want to make sure you get mentioned, either in the Buyer’s Guide or right here on VeloNews.com. From the guy hard at work brazing in his parent’s basement, to the more established company with its own production line, we’d like to hear about your business.
The only thing we ask is that your company produce at least five framesa year and not more than 300. If you produce hundreds of frames, chancesare pretty good that we already have got you covered in the Buyer’s Guide.
Please send the following information to email@example.comCompany NameBuilder’s NameTotal number of frames produced in 2004Types of frames produced (road, TT, full suspension, ‘cross, track, etc.)General materials you work with (Steel, aluminum, ti, carbon, etc.)Custom sizing options available?250 word company background (why do you build bikes)Contact info (website, phone, address)