Today I took my bicycle over to a hill near my house on Long Island to do a wheel test. It's pretty steep and about a mile long and there was a strong, steady tail wind. I brought three rear wheels, a Renn Disc, a Zipp 404, and a Mavic Helium. All the tires are Verdsteins pumped to 120, the Helium has a Specialized tire. The bicycle; Kestrel Talon with a Reynolds Ouzo Comp Aero fork (my wife got it for me for Christmas) and a Zipp 404 front wheel. Starting from a dead stop and just freewheeling down the hill, here are the results. I made three passes with the disc; 39.5, 43, 41.5 mph (top speed). Three with the Zipp 38, 38.5, 40. One with the Helium; 36. What does it prove? I don't know. What would I recommend? If you are doing an all downhill TT with a tail wind, deffinately choose the disc! My next test will be in the mountains in Upstate NY. I know a shallow uphill that takes around an hour. I'll test the disc against the Zipp on that on. Stay tuned for further results.
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''Sweeney - you can both crush your AG *and* cruise in dead last!! đŸ˜‚ '' Murphy's Law
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''Sweeney - you can both crush your AG *and* cruise in dead last!! đŸ˜‚ '' Murphy's Law