Join Date: Feb 2006
Location: Driving the pace in the crosswind
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Originally Posted by branman1986
Which would be the better rear wheel for me?
-new Zipp tubular disc
-new 808 tubular disc with PT hub
At first I didn't like to TT with my PT, but now I realize that I really use it or I have these lapses of concentration where I let my power fall.
Also my current front wheel would be a Carbone...would I really have significant time savings going to an 808?
If you let the power drop more than say 5% of a TT, then having a steady power output will be more important than the disc wattage savings. Plus, you can (I think...maybe the rims are to deep) put a wheel cover on the 808? If you are tlking about significant time savings going from a rear carbone to an 808 I would say, "probably not." However a front 808 will be seconds faster over a long TT (>10 miles) than a carbone.
I had a similar question: I have a set of hed tri spokes, but I was thinking of switching to the zipp 404's as they are over 500g lighter and my most important tt race is a little hilly (steep rollers, nothing out of the saddle, maybe 1-2 miles at 2-3% grade for the finish). Is it worth it?
Zipp 404's are the best all round race wheels, period. If a person were to only have one wheelset, the 404's should be it. The problem arises with aero qualities versus weight savings. Cervelo has a nice tech article on their site explaining for the average 250watt power output, anything at 5% or higher is better to save weight. At 400 watts, anything at 8% or higher is better to save weight. Of course that is with regards to their frames, but I have spent a lot of time with analytic cycling and it seems that weight savings start becoming more important than aerodynamics at about 14 mph or less.
If you r hill is short rollers, I would stick with the trispokes.