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Technically 3.2W as it’s 2 tyres.
Good point, and the test is done at 28 kmh/h and with RR linear with speed at 50 km/h we're up to 5.71 watts difference.
So the actual rolling resistance is approximately 2 * (bike+rider weight/85kg * Speed/28 * measured rolling resistance), that means the Corsa Speeds are about 13.5 watts faster than the 5000 tubed for me at 50 km/h!
t’s worth noting that the Corsa Speed only uses a single compound. It’s marketed to be far less grippy than the Corsa or Corsa control, which use 4. So it isn’t recommended to race on the Corsa Speed unless you’re sure you’re not going to be taking any turns fast. They’re good for TTs though.
Corsa Speed seems like a lot more trouble than it's worth, 5000 TL is still 7.7 watts faster at 50 km/h and equivalent pressure than the 5000 tubed.
Can’t comment on TL but I run tubes and check pressure before most rides. The commuter bike gets it done once a week and that’s only as I go a little hard on Monday so I know it’ll be fine come Friday.
Seriously OP, 30 seconds with a track pump is no great hassle.
Seriously OP, 30 seconds with a track pump is no great hassle.
What's next, shifters I'll need to recharge weekly? Slippery slope ;p
Think the 5000 TL would be fine, but might wait until it's winter and I really need the puncture protection..
I've got GP5000TL in 28mm on my current wheelset (DT Swiss ARC1400 48's) set up with DT tubeless valves and Squirt tyre sealant. I previously had GP5000TL in 25mm on a set of DT Swiss PR1600 32's.
Faff wise was absolutely minimal, they went on with a little bit of persuasion and inflated easily and seated first time.
I check the pressures before every ride, i used to do this when I had tubed GP4000 tyres anyway, its just good practice. As for actual pressures, I personally feel there's a lot of misinformation about how low you can go, for your average 75-80kg rider on a 7-8kg bike in my experience and taking advice from riders much better than me, on a 28 you're looking at 75-85 psi (obviously a bit less in the front) as lower than that can lead to rims digging on pot holes and squirmy feeling when pushing hard through corners or descending at speed.
As for the other factors, they feel nice, grip well (although I couldn't tell you if they grip better than tubes tyres) and roll well. I haven't had an issue in 1000km set up like this.
On another bike I ran Spesh Roubaix Pro 2bliss in 30/32mm on DT CR1600 23's tubeless for nigh on 4000km of mixed surface commuting, these were at 60/65 psi, not one puncture or issue in that time in all sorts of weather, they had slightly less pressure loss than the GP5000TL set up, but they're bigger volume tyres and lower pressure and a damn sight heavier / robust than the GPS.
So, I'm definitely a convert to road tubeless when set up with proper tubeless tyres on proper tubeless wheels.
Made the jump, follow up here https://singletrackworld.com/forum/topic/continental-5000-tl-farsports-tl-ready-60-mm-rims-noob-case-report/
After some growing/learning pains all seems good, apart from the 5000 TLs deseating (dropping into the center channel) at sub approx 25 psi - ideally it wouldn't unseat all the way down to flat. One suggestion has been to add a layer of rim tape to tighten the fit. Seems like farsports favored easy seatability over deseating protection designing these.
they're very good, but they don't last long.
you'll go fast and not have any punctures while they are in one piece.
I just bought a pair of tubed Schwalbe One Evo's from Merlin for £16.50 each delivered.
At that price, there's no need to try Cheng Slime ditch finders or whatever the cycling equivalents are.
I also use 28c Schwalbe Durano's. IIRC they're ~250g and the last pair lasted well over 6k miles before I got an egg in one.
I'm still running tubes as I get so few punctures, the 'benefits' of tubeless are offset by cost and weight. Obviously I'm not factoring in RRR which is clearly witchcraft. I'm running 100 psi on 23's, 90 psi on 25's and 85 psi on 28's. Comfort is fine, zippyness is also fine.
I'll give tubeless a go at some point but as of now, there's no compelling reason to do so (for me). I'll resist the marketing hype/fashionistas on this as I will for road 1x and perhaps Di2 😉
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that means the Corsa Speeds are about 13.5 watts faster than the 5000 tubed for me at 50 km/h!
If you're averaging 30mph, you should be out training with your pro mates not fannying around on here or the Directeur Sportif will have your guts for garters...
It is not marketing hype, it is just that your use case doesn't really fit with the benefits of tubeless. Main benefit for me is much lower number of punctures. If I didn't get punctures I wouldn't bother with tubeless as I am sure most other wouldn't.
Putting a tube in is always going to be easier than sealing a tyre, adding sealant, topping up sealant etc,. but if you get a few puncture a month tubeless becomes more worthwhile.
but if you get a few puncture a month tubeless becomes more worthwhile
If you're getting that many, you're riding in the wrong place or using the wrong tyre for the job (or both). Get some Marathon's...
I ride on a combination of tarmac and flinty gravel with road tyres so yes to most people I am riding the wrong tyre for the job (well half the time but that is the compromise with mixed surface rides) However, a "correct" gravel tyre would puncture just as much is running tubes. Running tubeless removes pretty much all of those punctures. Like I said, if you are in a situation where you don't get punctures then tubeless is probably not worth bothering with.
@kerley Have you tried Schwalbe's pimply gravel tyres? They're OK on the road and might be a bit betterer for you off road. You might still go for the TL version to avoid punctures.
One to piss off the purists... We did SDW a couple of times and got loads of punctures. Next time, I added some jizz to the inner tubes and lo and behold, NO PUNCTURES! I did have a couple of jizzy bubbles on the tyres so would definitely have punctured without. IIRC this was/is marketed as 'Slime' or some such. I just used a small bottle of Stan's having run out of Wickes latex carpet glue (AKA homemade jizz) in the early noughties 😁
I also use 28c Schwalbe Durano’s. IIRC they’re ~250g and the last pair lasted well over 6k miles before I got an egg in one.
I wouldn't bother with tubeless if I didn't care about rolling resistance and to a much lesser degree weight. I'd just get some mega puncture proof slow and heavy tire.
But I want to have my cake (go as fast as possible) and eat it too (use the bike for getting around town in all sorts of weather without punctures). The best tire for this seems to be the 5000 TL - pump it up to 100 psi to go super fast on smooth roads, leave it at 80-90 psi for day to day.
I've been running a 23mm GP5000 on the front 622-17c Hunt Aero Light Disc wheel for just over a week at ~95PSI with a Conti Supersonic tube (me in kit ~79Kg, Cube ~8.75Kg, up to ~1.5Kg of water), in combination with my two year old 28mm (really ~31.5mm) GP4000 on the supplied Fulcrum rear wheel...
Surprisingly not noticing much less comfort having swapped from a 28mm Rubino Pro G+, but I am noticing higher speed averages, I even managed back to back short ~12 mile interval type rides on consecutive days of 20/19.9mph which is a first for me on my far from aero 58cm Attain Pro Disc.
Got a 25mm GP5000 to fit on the Hunt rear, while also fitting new chain, 11-34 cassette and R7000 GS rear mech before hopefully heading to Prestatyn in a few weeks to see family and tackle Gwaenysgor's 33% slope and with a bit of luck the long "Road To Hell" climb heading south west from Denbigh.
Yeah I run Supersonic's on the light bikes but everyone moans about them on here. That's a funny post though ^, 11-34, a GS and 20mph average 😁
@kerley Have you tried Schwalbe’s pimply gravel tyres? They’re OK on the road and might be a bit betterer for you off road. You might still go for the TL version to avoid punctures.
I run road tyres because my frame only takes 25c max. I am currently using heavy duty tyre with tubes as they don't puncture. I am more concerned with punctures than breaking speed records.