Calnago wrote: ↑
Thu Jul 11, 2019 11:24 pm
TurboTommy wrote:I often read these lightweight discussions with interest. I generally defer to others greater knowledge around these parts. But my experience with lightweights is quite different to the general consensus here. I have the 24E tub version, and so far they’ve behaved themselves much better than I thought they would. Does anyone else have the 24e version here? Just wondering if the slightly wider rim makes much difference to the way the catch the wind.
For reference the sketchiest set of wheels I ever had was a set of Planet X 50mm tubs that had a very similar profile to lightweights. Man they were scary in the wind. Like a pair of sails, looking to take you off the edge of a road at any moment!
I have to say I don’t have enough experience with the new 24mm version to say one way or another, but I would guess that they are more stable than the prior 20mm versions, especially if you’re you’re using 25mm tires. I’ve done quite a lot of experimenting with the different versions of Boras and with different width tires. They were all tubulars So nominal tire width was consistent regardless of rim width. Here’s my experiential results....
- Old Boras ~20mm with 22mm Veloflex Carbon tubulars: I’m a big guy so that was just not enough volume for me, but at the time that’s what was run so I went with it. High pressures, hard ride, rolled fantastic.
-Old Boras with 23mm Veloflex Carbon tubulars: nicer feel than the 22mm. Little bit more volume was good for my weight.
- Old Boras with 24mm Veloflex Roubaix tubulars: this is my favorite size tubular on the old Boras. Nice and stable. Good road feel. I like them. Straight down a descent its like you’re in a free fall. With the Cult bearings and narrow rims plus narrow tires the immediate speed was noticeable and any negative aero effect did not seem to be coming from the wheels for sure. But a little sketchier then I’d like to feel under my weight.
- Old Boras with 25mm Veloflex Arrenberg/Roubaix. Ok, but starting to feel like the tires are a tad big for the rim. Hence I prefer 24mm tubulars in the old Boras.
-New 2015+ Boras (24mm) with 25mm Arrenbergs/Roubaixs. Kind of the holy grail in wheels that I’ve ridden to date as far as I’m concerned. Great road feel. Good stability. Fantastic hubs/bearings. For all out straight line downhill speed the old Boras with narrow tires are probably the faster of the two but overall confidence is higher on the wider new 24mm Boras.
- New 2015+ Boras with 27mm Veloflex Vlanderens. Very nice tires. High volume. Ran at about 80psi for my weight. Very comfy but on the mushy feeling side. On the decent roads I ride I prefer the 25mm versions of Veloflex tubulars. Removed the Vlanderens and gave them to a friend.
So, what this has to do with Lightweights is that I would expect the newest 24mm wide Lightweights to be better than the old in terms of wheel to road stability, but they still have the wide spokes and tall hub flanges which have to be catching more air than the Boras spokes and essentially no “flanges”. I just have not ridden the newest versions in any conditions that I could verify this one way or another. Just set them up on a bike or two and rode them long enough to ensure that the brakes were adjusted perfectly. On Boras, you need to run the brake pads a little more open than you do with Lightweights but overall I prefer the Boras much more, and again, just don’t have enough time on the newest Lightweights to say for sure, but the overall characteristics of them which I think give them their less than stellar qualities in wind (wide spokes/deep thin hub flanges) are the same. Still, due to their wider width alone, they are probably more stable on the road. I’m basing that on the difference I felt going from old Boras to the new Boras, with both versions being similar in width to the old and new versions of the Lightweights. Unfortunately, I won’t be able to test them more thoroughly anytime soon since the friend with the new wider Lightweights returned them due to an unresolvable Creek and ended up with ENVE 3.4’s. And the lack of user serviceability of Lightweights is a huge negative to me as well.