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Lenticular vs. Flat discs(4 posts)

Lenticular vs. Flat discsWoof the dog
Jul 10, 2002 7:32 PM
Which one is faster? Cobb's data shows lowest is the flat disc while everyone else, especially Hed, brags how lenticular is faster.

More importantly, what do you guys think about Renn discs (www.rennmultisport.com)? Are they good stuff or unreliable?

Thanx a lot

Woof the dog.
re: Lenticular vs. Flat discsAkirasho
Jul 10, 2002 8:25 PM
... some raw data might suggest that in test simulations, the lenticular is more aero... which might translate into "faster".

In real world situations, depending on the length of an event, terrain covered and even wind conditions (it rarely comes directly fore or aft), along with weight and wheel size (if you really want to get picky, see some of the stuff Cervelo has to say about rear wheel cutouts and what's effective), it probably doesn't matter...

I run both a flat and a lenticular... but alas, I can't give any honest feedback (lenticular is 700C HED, flat is 650C ZIPP). Aside from the aero surfaces... there's the matter of wheel size and weight...

For most of us... I'd suspect that either will give you what you seek (unless we're talking Ironman distances on a dream course).

As for the RENN... I don't have any first hand experience, but a local rider has done quite well with said... course, he's got onehelluva motor... Looks like XLabs is offering a new disc as well (seen it in print ads for Nytro... but last I checked, it's not on their website (looks like an H3D 'cept it's got four "spokes" instead of three).

We abide.

Remain In Light.
re: Lenticular vs. Flat discsWoof
Jul 11, 2002 7:12 AM
I was wrong. Analytic cycling shows flat a little bit slower than lenticular.

Thanx.

Woof that is about to turn lenticular as well.
re: Lenticular vs. Flat discsDougSloan
Jul 11, 2002 7:15 AM
I read somewhere that flat is more aero in straight on wind, but lenticular is better in crosswinds. The flat still has negative drag numbers in some crosswinds.

HED, I read, had some problems with derailleur clearance with the lenticular wheels.

The flat ones are lighter. The Zipp is under 1,000 grams in 700C. Darn light for a disc.

Doug