Fast Gravel Rims: weight, aero, both?
11-24-18, 04:21 PM
#26
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Aero matters? Yeah, in our DK even (MI C2C) riding 212 miles due west at 20mph (or any speed) in the spring can mean an apparent wind of 40mph in an open farmland environment. Aero bars could be huge for a solo rider. Can't use them in a pace line, and I'm going to tend to ride in a pace line. Again, in that CGN video, wearing a tight fitting jearsy made a LOT more aero difference than deep section wheels. I don't remember the numbers but aero wheels were less than 5 watts. Yeah, If I'm doing a solo time trail at the velodrome at 30+mph its going to make a difference (and more than 5 watts at those higher speeds). But I'm skeptical its going to make much of a difference in a gravel race.
Yeah, lack of a butyl liner makes a difference - your explanation helps - thanks. Butyl liner is why my G-One tires are 100gr heavier than my Ramblers. Realistically, my latex makes a nice latex liner, so the butyl liners are a bit of overkill. The Butyl does allow my G-Ones to hold air when the latex is dried out. But on my Ramblers, when they stop holding air, I know I'm overdue to refill the latex. The G-Ones could dry out and I would never know.
Yeah, lack of a butyl liner makes a difference - your explanation helps - thanks. Butyl liner is why my G-One tires are 100gr heavier than my Ramblers. Realistically, my latex makes a nice latex liner, so the butyl liners are a bit of overkill. The Butyl does allow my G-Ones to hold air when the latex is dried out. But on my Ramblers, when they stop holding air, I know I'm overdue to refill the latex. The G-Ones could dry out and I would never know.
11-26-18, 08:23 AM
#27
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Yeah, that is clear. Still, it seems off the charts. Most other tires in the 38-40mm range are closer to 500 grams. It is rare to find one under 400 grams. Near 300 grams is just about unheard of. Does anything else come close (other than the super light Compass tires).
For instance, Conti just came out with the Grand Prix 5000. Definitely a benchmark tire. But the TL 32mm tires weighs 370. Tyically that is a very light tire, but this 38mm weighs less than the Conti 32mm?
Most TL tires I see have thicker casings that add similar weight as an inner tube (often ~100gr for 40mm; 80 gr in the case of the 32mm 5000 above). 320g weight 38mm tire implies that the casing is much thinner than is traditional for a TL tire.
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2014 Cannondale SuperSix EVO 2
2019 Salsa Warbird
2014 Cannondale SuperSix EVO 2
2019 Salsa Warbird
