My first ride on my set of Zipp 404 firecrest tubular wheels was amazing, they felt so fast, so smooth I was in love. I never had any issue on down hill runs up to 50 mph with them and my BMC TMR01. I did get thrown around at times by strong gust of wind just on normal rides, these would freak me out a bit, and my back wheel would move side to side ezaly just by hand.
Like most of us after awhile I wanted a change and had read really good reviews about the Reynolds Aero line, these are more of a tear drop shape like the Reynolds RZR line. I came across a really good deal on a like new set of Reynolds Aero 58 / 72 Tubular wheels so I jumped on them.
Comparing these to the Zipp 404 Firecrest tubular wheels I have, I would pick the Reynolds.
The Reynolds are ....
- Lighter - They are right at 1300 grams
- Stiffer - They don't move side to side like the Zipp 404 are know to do
- Braking - Hands down the Reynolds are so much better, especially with the Reynolds Cryo Blue Power Brake Pads
- Better Quality - These things are a work of art
- Better Hubs - DT Swiss 240 VS Zipp hubs with know issues
- Wider - Not has wide as some of the current wheels but wider that the Zipp 404 Firecrest
- Faster - Its had to say but they do feel faster, and I have been setting new Strava PR's on every ride
- Cross Winds - You really don't even notice them, this is what I read in all the reviews and it holds true.
On top of all that they just feel better all around, I have more confidence riding them, this brings miles of smiles.
I kinda wanted the Reynolds 72 / 72 Aero Tubular wheel combo but ended up with the 58 /72 for a sweet deal and maybe that's better as I read this excellent post on Slow Twitch on crosswind stability. I was not aware of point 2. .....
A few thoughts on crosswind stability for you.
1. Front wheels cause more stability problems than rear wheels because they have a steering axis (your handlebars/head tube). When wind hits your front wheel it can cause the front wheel to turn, which can cause stability issues, and for lack of better terms, scare you. The depth of your front wheel, and the shape of your front wheel both contribute to the instability. In most cases, the deeper the wheel, the more unstable it becomes. With respect to wheel shape, wheels that produce a high amount of yaw torque (a fancy way of saying the wind causes your handlebars to turn) are also less stable. Some of the most modern wheel designs have taken not only aerodynamics into consideration, but also yaw torque. As an example, our design algorithm included yaw torque as a parameter. This is because we know stability is important, simply because a fast wheel that is nearly impossible to ride, will slow you down because you can't control it.
2. The depth ratio of your front wheel compared to your rear wheel matters when talking about stability. As your rear wheels gets deeper with respect to the front wheel, your center of pressure moves towards the rear end of the bike. To visualize this, imagine you were looking at a picture of yourself riding your bike from the side. If you had to find the center of the "area" you create, that would be your center of pressure. As you create more rear area with a deeper rear wheel, the center of that area moves backwards. As your center of pressure moves backwards, you reduce the force on your front wheel, and in turn increase stability.
So maybe a 58 / 72 size combo is more stable that a 58 / 58 or a 72 / 72 ?
Exactly what Karl said. I have the 72/72 combo and freaking love it. I suck at descent.. easily toasted previous two sets of farsport. Braking on these are fantastic even for a novice like me. Crosswind... hum.. u feel some but coming down at 35mph I feel very confident with these set. With the previous 38mm farsport in both V or U shape, I feel pushed around, but not much so on these Aero72.
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