Lightest 700c ~40mm Tubeless Gravel Tire?

[mpulsiv]

Based on some rider's review, 35mm (part #11601054) Schwalbe G-One Speed on 21mm rim stretches to 38mm, which is perfect
Per Schwalbe, this tire is 450 grams. Can someone chime-in whether it's somewhat accurate?

[emotive]

Based on some rider's review, 35mm (part #11601054) Schwalbe G-One Speed on 21mm rim stretches to 38mm, which is perfect
Per Schwalbe, this tire is 450 grams. Can someone chime-in whether it's somewhat accurate?

Not the same model, but the 40mm Schwalbe G-One All Round weighs only 440g, and on a 24mm ID rim measures 38.8mm, according to https://granfondo-cycling.com/the-best-gravel-tire

On a 21mm ID it would likely measure 38mm also.

[mpulsiv]

I recommend against running Compass/Rene Herse tires tubeless. My experience was that the beads permanently stretch, making it very hard to air up a used tire. The casing is porous so the sealant bleeds through the sidewalls and formed a bubble in the tread of my tire. Probably great with tubes though. I replaced them with Hutchinson Overides, which probably are a bit heavier with more rolling resistance, but they are more suitable for running tubeless.

I've been reading reviews about Hutchinson Overides. Sound like a solid tubeless tire. 35mm is ~360 grams and 38mm is 411-444 grams, quite a discrepancy between batches.
I'm torn between these and Schwalbe G-One Speed. On paper, Schwalbe G-One Speed is heavier, visually have less traction and reported as more fragile.

Merlin got a really good deal and they carry 38mm tan wall, listed at 375 grams? www.merlincycles.com/hutchinson-overide ... 34687.html
According to Hutchinson, there's no tan wall www.hutchinsontires.com/us/cyclocross/t ... w-standard

[Archer13]

I'm riding Compass 700C x 44 Snoqualmie on 20mm rim (Pancho Wheels Spirit 35), and actual width is about 41-42mm on 30-40psi. Width is about the same for standard and extralight tires.

[Aeo]

Hutchinson Overides. Sound like a solid tubeless tire. 35mm is ~360 grams and 38mm is 411-444 grams, quite a discrepancy between batches.

Says on the Hutchinson website:
The 700x35 version adopts an adapted semislick profile favouring performance and comfort. The 700x38 version has had more work on its central part to bring adhesion and ridability.

[Aeo]

Also I mounted a new pair of 40C 120 TPI EXO Maxxis Rambler.
They are definitely wider than the first generation when they were only available in 40C.

I measured 41mm+ on a 19C rim and that is before sitting on the bike and making them even wider.

[Evaso]

Conti Terra speed - weighed at 435g. No idea about ride yet, but would like to know!

https://r2-bike.com/CONTINENTAL-Tire-Gr ... ection-TLR

[NickJHP]

Panaracer Gravelking 700x38 slick. 340g on my scales, measure 40mm wide on 25mm internal width rims after a couple of weeks inflation. However, by my measurements (thickness at the tread centre minus the sidewall thickness) the tread is only 1.6mm thick.

[Marin]

Panaracer Gravelking 700x38 slick. 340g on my scales, measure 40mm wide on 25mm internal width rims after a couple of weeks inflation. However, by my measurements (thickness at the tread centre minus the sidewall thickness) the tread is only 1.6mm thick.

Gravelkings are pretty slow though, so the weight advantage isn't really worth much

[Marin]

Conti Terra speed - weighed at 435g. No idea about ride yet, but would like to know!

https://r2-bike.com/CONTINENTAL-Tire-Gr ... ection-TLR

They blew the competition away in the rolling resistance tests in Rennrad magazine BTW.

[yinzerniner]

Conti Terra speed - weighed at 435g. No idea about ride yet, but would like to know!

https://r2-bike.com/CONTINENTAL-Tire-Gr ... ection-TLR

They blew the competition away in the rolling resistance tests in Rennrad magazine BTW.

Bikerumor actually listed them at lower weights. 420g for 700X40. Nice looking fast tread pattern as well.
https://bikerumor.com/2019/08/27/contin ... vel-roads/

[mpulsiv]

Challenge made a splash with new Gravel Handmade Tubeless Ready (HTLR), slated for release in November www.challengetires.com/news/handmade-tubeless-ready
36mm "Almanzo" would be weapon of choice. Too bad it will only be released in 33mm (e.g. 390 grams). "Gravel Grinder" will be available in 36mm but it's slower and heavier (e.g. 425 grams). Both 260 TPI

www.cxmagazine.com/challenge-handmade-t ... res-launch

[nickf]

Bontrager CX0 38c is around 375g. I have been running these with tubes and they have proven to be durable and fast. They roll well on the road also. Once that center tread wears a bit they really fly.

[ooo]

weight comparison is not fair without bead-to-bead width info

[NickJHP]

weight comparison is not fair without bead-to-bead width info

I made some measurements on a new Panaracer Gravelking 700x38 slick and Compass Barlow Pass 700x38 extralight. The mounted tyre measurements were made after being inflated on DT Swiss XM421 25mm internal width rims for several days.

Weight:
Panaracer: 340g
Compass: 420g

Sidewall thickness:
Panaracer: 0.9mm
Compass: 0.7mm

Tread thickness (thickness at centre of tread minus sidewall thickness):
Panaracer: 1.3mm
Compass: 3.2mm

Width bead to bead laid flat:
Panaracer: 102mm
Compass: 109mm

Width and height after being inflated to 40psi for several days:

Panaracer: width 40mm, height 36mm
Compass: width 41mm, height 39mm

The Compass cost me about twice as much as the Panaracer, but with about 2.5 times the thickness of tread, if both tyres last without damage until the tread is completely worn, it would probably wind up costing slightly less in terms of $/km.