Gravel tire rolling resistance tested
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My best BWR (SD) finish (relative to the field) was on Compass Snoqualmie Pass tires (EL front, regular rear). I don't think I'd ever run a tire with tread blocks of any sort for that...shit, I rode 26c Turbo Cottons (successfully) the year before that <LOL>TobinHatesYou wrote: ↑Tue Nov 09, 2021 5:45 am
Possibly better tread longevity than a Terra Speed I guess? Anyone thinking a GK SS would be a good option for BWR (SD) should just go with Terra Speeds instead. Otherwise they should be on even faster tires.
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I live in North County (San Diego) and ride BWR roads/dirt pretty regularly and done the event a handful of times, usually finish in the upper 10% barring incident. I'd never run more than a tubeless 28/30 road tire. Firt two editions I used Vittoria Paves with latex tubes, then tubeless, Hutchinson 28c, Schwalbe Pro 1 28c and GP5000 28c. Never had a flat.jfranci3 wrote: ↑Tue Nov 09, 2021 5:22 amWhile we're on this topic, is there ever an occasion for the GK SS? Wet rock? Traveling? Brick road ride?
They're 2w slower than the slick and 1w faster than the SK on BRRs test. Seems like if they were more aero than a SK or Terra Speed, they'd be a decent BWR tire. I doubt they're more aero. I just can't figure out what they're for.
https://cdn.bicyclerollingresistance.co ... g-ss-3.jpg
I think if you do BWR(sd) waffle course a 30/32 is ideal. I did the wafer which percentage wise is more dirt. Maybe the 35's slowed me down a bit, but I was there just for the experience. I felt like the 35s were handy in the sandy section as I had to yell at people to keep peddling or I was going to run them over.
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tanhalt wrote: ↑Sat Nov 13, 2021 1:41 amMy best BWR (SD) finish (relative to the field) was on Compass Snoqualmie Pass tires (EL front, regular rear). I don't think I'd ever run a tire with tread blocks of any sort for that...shit, I rode 26c Turbo Cottons (successfully) the year before that <LOL>TobinHatesYou wrote: ↑Tue Nov 09, 2021 5:45 am
Possibly better tread longevity than a Terra Speed I guess? Anyone thinking a GK SS would be a good option for BWR (SD) should just go with Terra Speeds instead. Otherwise they should be on even faster tires.
I agree. I was just saying that if someone is going to run a semi-slick like the GK SS, they may as well just run Terra Speeds, which are almost semi-slicks IMO. If I were to do BWR SD, I'd probably just do 32mm GP5K TR and pray for no sidewall tears.
If you had a race such as this, with various terrains but none gnarly, what tyre model and tyre size would you reckon would be the right mix of speed and puncture protection? https://youtu.be/AQkqGdFRgXI
Organisers recommend bikes with "33c or more", which makes me think that there's no need to go for very fat tyres, but I don't know *anything* about gravel racing.
Organisers recommend bikes with "33c or more", which makes me think that there's no need to go for very fat tyres, but I don't know *anything* about gravel racing.
If you are not racing for the win, then just put some nice fat tires on your bike and enjoy the riderobeambro wrote:If you had a race such as this, with various terrains but none gnarly, what tyre model and tyre size would you reckon would be the right mix of speed and puncture protection? https://youtu.be/AQkqGdFRgXI
Organisers recommend bikes with "33c or more", which makes me think that there's no need to go for very fat tyres, but I don't know *anything* about gravel racing.
I have done 20mph/32kph average speed group road rides on my Specialized Pathfinder Pro 42c tires, so they roll really well on pavement and they work awesome on gravel.
Well I don't race to win because I don't have the legs for it, but I want to go as fast as I can and place as high as I can, and tyre selection will be by far the biggest contributor to that.fa63 wrote: ↑Sat Nov 20, 2021 1:19 pmIf you are not racing for the win, then just put some nice fat tires on your bike and enjoy the riderobeambro wrote:If you had a race such as this, with various terrains but none gnarly, what tyre model and tyre size would you reckon would be the right mix of speed and puncture protection? https://youtu.be/AQkqGdFRgXI
Organisers recommend bikes with "33c or more", which makes me think that there's no need to go for very fat tyres, but I don't know *anything* about gravel racing.
I have done 20mph/32kph average speed group road rides on my Specialized Pathfinder Pro 42c tires, so they roll really well on pavement and they work awesome on gravel.
If I can do it on 32c tyres I could also use the road bike which means some 2kg less weight, but ultimately I don't mind.
I see that most people love Pathfinders so I'll keep them in mind.
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If the test of gravel and road tires is the same, how is the GP5000TL in 32mm this slow?
https://www.bicyclerollingresistance.co ... 5000-tl-32
Edit: okay, they test Gravel tires with butyl tubes... which doesn't make any sense.
https://www.bicyclerollingresistance.co ... 5000-tl-32
Edit: okay, they test Gravel tires with butyl tubes... which doesn't make any sense.
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How is it slow? It's the 2nd fastest tire in the test, which is excellentFlatlandClimber wrote: ↑Sat Nov 20, 2021 11:17 pmIf the test of gravel and road tires is the same, how is the GP5000TL in 32mm this slow?
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It's a road bike tire with zero profile. I mean, it is only feasible for the lightest gravel and the hardest of hard pack. They test hardly faster than the much wider and knobbed Terra Speed, which is pretty surprising for me.Marin wrote: ↑Mon Nov 22, 2021 12:02 pmHow is it slow? It's the 2nd fastest tire in the test, which is excellentFlatlandClimber wrote: ↑Sat Nov 20, 2021 11:17 pmIf the test of gravel and road tires is the same, how is the GP5000TL in 32mm this slow?
The GP5000TL with a tube tests 19.8W
The GP5000TL with sealant tests at 8.3W
Idk, I find that a crazy big difference.
Cervelo P5 Disc (2021) 9.1kg
Factor Ostro Gravel (2023) 8.0kg
S-Works SL8 (2023) 6.3kg
*weights are race ready, size 58/L.
Sold: Venge, S5 Disc, Roubaix Team, Open WI.DE, Émonda, Shiv TT, Crux, Aethos, SL7
Factor Ostro Gravel (2023) 8.0kg
S-Works SL8 (2023) 6.3kg
*weights are race ready, size 58/L.
Sold: Venge, S5 Disc, Roubaix Team, Open WI.DE, Émonda, Shiv TT, Crux, Aethos, SL7
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A pressure diffiernce of 44psi vs 100psi as well as the tube/tubeless.
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10.3W at 60psi (https://www.bicyclerollingresistance.co ... comparison)CarlosFerreiro wrote: ↑Mon Nov 22, 2021 4:29 pmA pressure diffiernce of 44psi vs 100psi as well as the tube/tubeless.
Vs.
16.7W @55 or 14.7W @66psi (https://www.bicyclerollingresistance.co ... 5000-tl-32).
So basically a ~5.5W penalty per tire.
That's the difference between the fastest road tires and fast winter tires.
Just saying I am not impressed that one of the fastest road bike tires is not the fastest "gravel tire".
Cervelo P5 Disc (2021) 9.1kg
Factor Ostro Gravel (2023) 8.0kg
S-Works SL8 (2023) 6.3kg
*weights are race ready, size 58/L.
Sold: Venge, S5 Disc, Roubaix Team, Open WI.DE, Émonda, Shiv TT, Crux, Aethos, SL7
Factor Ostro Gravel (2023) 8.0kg
S-Works SL8 (2023) 6.3kg
*weights are race ready, size 58/L.
Sold: Venge, S5 Disc, Roubaix Team, Open WI.DE, Émonda, Shiv TT, Crux, Aethos, SL7
I don't know what the percentags of different surfaces are but did you not see the sections of loose/rocky doubletrack on that video? I don't think you'd have much fun going over that on a road bike with 32s as part of such a long day in the saddle.robeambro wrote: ↑Sat Nov 20, 2021 5:43 pmWell I don't race to win because I don't have the legs for it, but I want to go as fast as I can and place as high as I can, and tyre selection will be by far the biggest contributor to that.
If I can do it on 32c tyres I could also use the road bike which means some 2kg less weight, but ultimately I don't mind.
I see that most people love Pathfinders so I'll keep them in mind.
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Even if it's gravel 32s?Karvalo wrote: ↑Tue Nov 23, 2021 12:37 amI don't know what the percentags of different surfaces are but did you not see the sections of loose/rocky doubletrack on that video? I don't think you'd have much fun going over that on a road bike with 32s as part of such a long day in the saddle.robeambro wrote: ↑Sat Nov 20, 2021 5:43 pmWell I don't race to win because I don't have the legs for it, but I want to go as fast as I can and place as high as I can, and tyre selection will be by far the biggest contributor to that.
If I can do it on 32c tyres I could also use the road bike which means some 2kg less weight, but ultimately I don't mind.
I see that most people love Pathfinders so I'll keep them in mind.