![]() I have a bunch of that, but on my computer at home. Will post the graph later tonight, we saw the same trend with almost every wheel we brought to the wind tunnel. I am running 23mm tires on those (they look so tiny!) and I have noticed that in a heavier crosswind it feels about the same as running my 60mm clincher set with Michelin Pro 4 25mm tires (which actually measure about 28.6mm). Personally I have been running some 90mm clinchers in a couple races as we are about to release them soon. In the heavier crosswinds the air flows off the rim over the tire on the backside of the wheel better with a 23mm tire. This is also why there is better crosswind handling using 23mm tires opposed to 25s. With a 97 setup for both drivers do I stand a ch. So, in heavy crosswind situations there is a bigger difference in aerodynamics between a 23 and a 25mm tire. In this episode of Motorsport Manager 2017 Career mode we travel to Ardennes with our completely new team. At 10 degrees of yaw, the 25mm begins to stall out and the drag increases, whereas with the 23mm tire the drag continues to drop til about 15 degrees yaw angle. I will try to post the image later.īasically, the drag graphs look the same from 0 to 10 degrees of yaw angle with the 23mm tire being about 10 grams of drag lower (at 30mph using a Conti GP4000 tire). November Bicycles Blog - November in the wind tunnel: is wider*faster? where both their wide rims and Zipp's 404 were faster using 23 mm tires than 25.Ĭlick to expand.I have a bunch of that, but on my computer at home. The only other tire study that I am aware of was done by November, another little guy: November Bicycles: Race smart. November Bicycles Blog - November in the wind tunnel: is wider faster? where both their wide rims and Zipp's 404 were faster using 23 mm tires than 25. Unfortunately I can't find the plot he references. I also found an interesting email from one of Zipp's lead engineers that states they designed around a 23mm tire although a 25 mm tire doesn't increase drag until over 10 degrees of yaw: Tech FAQ: Again, bigger tires roll faster!. In fact in Zipp's FAQ they state that the best setup is using a 23mm front tire and 25mm rear: Zipp - Speed Weaponry | Support | FAQs. To quote Deming: "In God we trust, all others bring data." I don't see anything on the Zipp 404 NSW page about being optimized for 25mm. ![]() Which is why they are doing a part 2 of the blog I linked where they sent all of the tested tires to Tom A () for roller resistance testing and then will be writing a post on the fastest overall tire.īesides, which of the big players, based on your post above I assume you mean enve and zipp, have shown that their wheels are faster with 25mm tires than 23mm? On the Enve SES 4.5 page that they state it was designed for use with 25mm tires but see no data. ![]() I'm not missing that at all, I use 25mm tires on both my bikes, and neither is Flo.
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