According to Flo's website, the difference between the 77 and 64 is like 12 seconds over an Ironman.

I'd go with what you think looks better.

A solid rear disc wheel is fastest and the most stable.

Echoing above, choose depth for looks and get a rear disc.

I started with FLO 60mm/90mm wheels. I found the 60mm looked a little anemic on the front of an aero bike with wide tubes. And, I wished I got a disc. So, I sold those and got 90mm front and disc rear. The bike looks way better and flies through the wind.

You are right on looks being important here. Unfortunately a disc is a little out of my budget right now but I appreciate the input. Now its just a matter if I care to spend a little more on the front to get the even look front and rear...



I missed the 12s comparison too on their website, thanks for pointing that out.

I vaguely remember reading somewhere that the majority of the wind resistance in spokes is in the first two inches on the outside of the wheel. It makes sense because those spokes are moving the fastest. That is why most of the first aero wheels were in the 60mm range. Beyond 60 mm there are marginal gains.

Still, if I had the chance, I would go to a 90mm front to pair with my rear Powertap wheel/cover. Real discs are expensive and honestly, unessessary until you have to have that soul-crushing grinding sound a full disc makes.

 
I think the handling difference would also be pretty minimal since it's the same rim shape between the two depths. IME it's when you totally change wheel model/brand that the handling performance really becomes more noticeable. Since you're a confident bike handler my vote is to go 77 front and rear, all day.

Side note, irrelevant since I recommend the 77s, but you need not worry about 141g, if it ever becomes a question here or elsewhere in your choices. That amount of weight won't affect anything in terms of noticeable time difference or riding quality.

Flo wheels are really good. I've had 2 pairs. Chris and John are also very helpful. Can't really go wrong there.

I'd also suggest looking at premier wheels. According to a test (I think done by Brian Stover on here) they tested very fast and outperformed top tier wheels.

Check them out. D. Kennison is on here and owns premier bikes/wheels.

HED jets are also great ( I have many of them).

Good luck!

As another poster already mentioned the difference between the 60 and the 90s is very small. So it's really about what you think will handle the best for you and how you think it looks.

I found the post by desert dude:

Re: Recommend a wheelset <$2,000 [stewie] [ In reply to ]
desert dude Apr 12, 23 6:40 Post #9 of 27
If I were buying wheels and going fast & quality were important to me, I'd go with Premier or Hed.

I've tested both wheels, and others, those are the cream of the speed crop from what i tested.
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