Schwalbe G-One (35 or 38)

84 replies · 29,211 views

chas
1,305 posts
#61Mar 21, 2017, 7:09 PM
Yeah, that is one reason why I got a rambler. I have some light weight conti's that weigh more than that with an innertube...
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Jah4236
2 posts
#62Mar 23, 2017, 12:43 PM
!!Caution!! when purchasing G-Ones you need to be aware there are to different lines, Performance and Evolution. Performance are not spec'd as "tubeless compliant". That said, you are able to run them tubeless but mine oozed sealant from the sidewalls slightly before fully sealing.

https://www.schwalbetires.com/node/5149

Running G-One 35c's on my RTL9, house wheels(19mm). The width comes out slightly larger the 37mm, lots of breathing room on the Niner. Run 20/80 road/gravel and couldn't be happier. I will admit they are a little squirrely if you get into some greasy stuff. Came on the bike with the 3 star build. I was slightly disappointed they were the Performance line and the wheels weren't tubeless compliant. Convert fine, running 30-50PSI. Did have one pinch flat at 40PSI before loosing the tubes.

My other wheel set are Focus Mares take offs. Running Pro-Ones 28c / Tubeless / 70-80psi / 100% road. They only come in Evolution line. Can't go wrong with the Schwalbe, superior quality and performance.

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tb123
8 posts
#63Mar 30, 2017, 5:23 AM
Jah4236 wrote:!!Caution!! when purchasing G-Ones you need to be aware there are to different lines, Performance and Evolution. Performance are not spec'd as "tubeless compliant". That said, you are able to run them tubeless but mine oozed sealant from the sidewalls slightly before fully sealing.

https://www.schwalbetires.com/node/5149

Running G-One 35c's on my RTL9, house wheels(19mm). The width comes out slightly larger the 37mm, lots of breathing room on the Niner. Run 20/80 road/gravel and couldn't be happier. I will admit they are a little squirrely if you get into some greasy stuff. Came on the bike with the 3 star build. I was slightly disappointed they were the Performance line and the wheels weren't tubeless compliant. Convert fine, running 30-50PSI. Did have one pinch flat at 40PSI before loosing the tubes.

My other wheel set are Focus Mares take offs. Running Pro-Ones 28c / Tubeless / 70-80psi / 100% road. They only come in Evolution line. Can't go wrong with the Schwalbe, superior quality and performance.

\nI'm getting a little confused with all the G-One models these days, as well as the Performance and Evolution lines I have also seen a G-One Speed variant which seems to be a successor to the S-One and Big-One models. I believe it comes in a 30C only, but sounds like it's the "new" S-One.
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dangle
465 posts
#64Apr 3, 2017, 10:00 AM
Just as a reference point for other readers:

Two of the G-One Allround Evolution (formerly just G-One) 40-622 (700 x 38C) tires measured 40.5 and 40.0mm at 40 psi after two days of sitting on Stan's Crest (older 21mm inner diameter) wheels.

I'm thinking of grabbing a 35 for the rear instead since I only have 2mm of clearance on either side.
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Slim
300 posts
#65Apr 8, 2017, 9:55 AMedited
Schwalbe G-One allround 40 - 475g
- 39mm casing, slightly wider knobs on 21mm internal rim, tubeless at 50 psi

Maxxis Rambler Exo 40 - 364g
- 42mm casing and knobs, on 21mm internal rim, tubeless at 45 psi
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chas
1,305 posts
#66Apr 10, 2017, 1:01 PM
did you measure those?

all but one of the Rambler reviews I read have them a bit undersized with the 40mm measuring 38mm. That is typically measured at the casing (the knobs are not too big).

I measured the 40mm at 38mm, and the 38mm at 34mm at the casing.
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Slim
300 posts
#67Apr 13, 2017, 8:58 AMedited
chas wrote:did you measure those?

all but one of the Rambler reviews I read have them a bit undersized with the 40mm measuring 38mm. That is typically measured at the casing (the knobs are not too big).

I measured the 40mm at 38mm, and the 38mm at 34mm at the casing.

Yes, of course those sizes are measured. I try to round off to whole mm as I feel +-.3 mm is pretty much my measuring accuracy anyway, as well as production variance.

Maybe other people were measuring at lower pressure (I had 45psi on my pump, which reads lower than my other pump, so maybe it was 50 psi)? Or mounted on narrower rims? Or with inner tubes? Or on a brand new tire? All those things can make a significant difference. Which is why I try to include those factors in my report.

Here is Jan Heine's article on measuring tires.

I measured again just now. I have a Rambler 40 on two different rims and both measure about the same. I measured at 40 psi on a different pump (no guarantees for the accuracy of that gauge). Tubeless:

On Stan's Iron Cross rims (20mm internal): 41mm knobs, maybe 40.5 mm casing.

On Bonty XXX rims (21mm internal): 41.5mm at knob, maybe 41 mm at casing.

So I would say that tubeless, they are 41 mm at 40 psi on 21mm rims.

One of these is the first generation tire (1 year old), another was bought recently but was labeled '40' which I think is the same (old) version.
Maybe the new version is narrower (and that's why it's labeled as 38)?

My measurements are consistent with G-Ted's here on the site:
"as it is a full 40mm wide on the “average width” Velocity A-23 rims and on the slightly wider HED Ardennes+, (21mm), they measured out slightly wider than 40mm with 40psi in them"

And with Gravelcyclist:
- Stans Alpha 340 rim, 39.3mm – 39.5mm (see photo below).
- American Classic Hurricane wheelset, 40.1mm.
- American Classic Race 29’er MTB wheelset(21mm internal), 41mm.
CX magazine has them at 38mm, but don't mention tire pressure or age, or whether they are tubeless, and that's on a 19mm rim.
Even they say:
"you’ve got access to wider rims, you can push these tires out to 43c on a 29mm internal width rim"
Slim
300 posts
#68Apr 13, 2017, 9:09 AM
The Rambler has a light buzz on pavement that the G-One does not.
Of course this is not surprising, the knobs are larger and more spaced out.
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Slim
300 posts
#69Apr 13, 2017, 9:27 AMedited
alembical wrote:I have the Ridley X- Trail as well and I am running the G-One in 35, tubeless and on a Hed Belgium + rim. Measures out at 37.8 (ish, depending on psi).

Same here:

G-One 35 (first gen) on my Iron Cross rim (i20mm), at 40 psi, tubeless, they measure out at just under 38mm.
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Jeb
113 posts
#70Apr 25, 2017, 7:42 PM
dangle wrote:Just as a reference point for other readers:

Two of the G-One Allround Evolution (formerly just G-One) 40-622 (700 x 38C) tires measured 40.5 and 40.0mm at 40 psi after two days of sitting on Stan's Crest (older 21mm inner diameter) wheels.

I'm thinking of grabbing a 35 for the rear instead since I only have 2mm of clearance on either side.

How easy did the G-Ones go on the Stan's rims? I have an older set of Crests and I'm thinking about the Schwalbes. Road Bike Review did a review of various gravel tires and couldn't mount the G-Ones on Stan's Iron Cross wheels, too tight.
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dangle
465 posts
#71Apr 25, 2017, 10:01 PMedited
Jeb wrote:

How easy did the G-Ones go on the Stan's rims? I have an older set of Crests and I'm thinking about the Schwalbes. Road Bike Review did a review of various gravel tires and couldn't mount the G-Ones on Stan's Iron Cross wheels, too tight.
\n \nI absolutely would not use the word "easy" here. They sat at max pressure on a pair of Mavic for a few days because I couldn't get them on the Stans. Then with soapy water and a bead jack they went on the Stans without too much drama and hung out a few days with no sealant. I made sure that I could get them off with two tire levers and then re-installed with sealant. Didn't even reach for the compressor because of how tight they fit. I have been running them around 30 psi rear and 27 psi front for gravel. 190-195 lb rider.
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Jeb
113 posts
#72Apr 26, 2017, 5:58 AM
dangle wrote: I absolutely would not use the word "easy" here. They sat at max pressure on a pair of Mavic for a few days because I couldn't get them on the Stans. Then with soapy water and a bead jack they went on the Stans without too much drama and hung out a few days with no sealant. I made sure that I could get them off with two tire levers and then re-installed with sealant. Didn't even reach for the compressor because of how tight they fit. I have been running them around 30 psi rear and 27 psi front for gravel. 190-195 lb rider.

Dangle, thanks for the info. I think I'll try a set of 43mm Panaracer GKs on the Crest rims. I have those tires installed on some Blunt SLs to stretch them out a bit before trying them on the Crests.
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ljsmith
762 posts
#73Apr 26, 2017, 6:37 AM
The G Ones use a UST shaped bead, which is larger than a normal tire bead. That is not going to play well with a Stans rim which is designed to tightly grab a normal bead.
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Jeb
113 posts
#74Apr 26, 2017, 8:01 AM
ljsmith wrote:The G Ones use a UST shaped bead, which is larger than a normal tire bead. That is not going to play well with a Stans rim which is designed to tightly grab a normal bead.

Not sure if your post was referring to mine but I'm not going to try G-Ones on a Stan's rim. I have a set of Gravel Kings for the Stan's which I hope will work OK. I might get a set of G-Ones for a set of Velocity Blunt SL rims. I do have a set of Stan's Alpha 340 rims with a pair of 25mm Schwalbe Pro One tires. They mounted by hand, inflated with a 30 year old floor pump, held air overnight with no sealant, and came off the rim with the use of one tire lever. I remounted them with sealant and am running them 70f/75r and they are a very comfortable tire. I think they are better than a tubed 32mm version of the Clement MSO. And they are as fast as the Conti 4000 tires with latex tubes.
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dangle
465 posts
#75Apr 26, 2017, 10:45 AM
ljsmith wrote:The G Ones use a UST shaped bead, which is larger than a normal tire bead. That is not going to play well with a Stans rim which is designed to tightly grab a normal bead.

Only sort of correct. UST refers to a rim and tire system that could hold air without sealant. The rims have a specific shape that interfaces with the shape of a UST tire bead. Once in place, they hold each other nicely. It's also a very specific circumference on both tire and rim. The beads are often made of much stronger (less stretchy) material. For the most part, 'other' tires had a more simple (and more stretchy) bead because an inner tube was holding it in place. Since UST tires were so dang heavy to hold air without sealant, they were pretty much dumped and brands would use the same bead, but can't call it UST.

Stans (and several others using/licensing the same idea) simply had a wider circumference rim. They don't 'grab' anything, they just stretch it so it fits tighter. The 'other' tires were a much tighter fit on the rim because it was bigger. Sealant easily made the tires tubeless so you had a much lighter wheel/tire system than UST. It didn't help that most UST rims were pretty narrow for a long time too.

Since there's really no reason not to put UST shaped beads on tires, more and more tire companies started doing it. Not all circumferences match though. It seems like WTB and (recent) Schwalbe use the original UST circumference while Specialized is slightly looser. Those are just guesses and I don't have the actual information.

If you have a tire with a bead that doesn't stretch much and carefully measured/designed for a 'normal' rim smaller than the oversized Stans rim, it makes sense that it wouldn't mount easily on a Stans rim. That being said, it is possible. WTB uses the same bead shape as Schwalbe and I ran a Cross Boss set at 22-24f 24-26r for CX season with zero burps on a Stans Crest wheelset. I barely used my tubulars because of the increased grip (entirely from higher volume) from clinchers that measured 38mm. I had tried a few 'non-UST shaped' tires and kept burping anything in the rear under 30psi. Until I finally destroy my Crests, I'll keep putting the UST shaped tires on because they just don't burp.
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dangle
465 posts
#76Apr 26, 2017, 10:47 AM
Jeb wrote:

Dangle, thanks for the info. I think I'll try a set of 43mm Panaracer GKs on the Crest rims. I have those tires installed on some Blunt SLs to stretch them out a bit before trying them on the Crests.

Nice. I haven't used any recent Panaracers, but I would be curious to know what you think of them. I did lose a little tension on the Crests when fitting the G-Ones, so keep an eye on the dish after installing.
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Jeb
113 posts
#77May 7, 2017, 4:23 PMedited
dangle wrote:

Nice. I haven't used any recent Panaracers, but I would be curious to know what you think of them. I did lose a little tension on the Crests when fitting the G-Ones, so keep an eye on the dish after installing.

So far I like them. I have about a 100 miles on them on hardpack, blacktop, ruts, and small gravel. They're comfortable, stable, quiet on the pavement, and seem fairly fast. Too bad I'm not. They measure 44.5mm at 40/45psi on the Crest rims.
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Jeb
113 posts
#78May 8, 2017, 1:25 PM
First ride on the G-ones. Some pavement, some dirt, a little mud, about 25 miles. They have a very supple feel to them, much like the Schwalbe Pro Ones. They are quiet on the pavement. I ran them at 41/45 psi on a set of Velocity Blunt SL rims which have a 20mm interior dimension and the tires measure 35.25mm.
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theadonnan
14 posts
#79May 10, 2017, 9:03 AM
2,000 miles in on some 700x30 g-one's (came on my diamondback haanjo) and I've finally managed to puncture the sidewall. I'd love more grip on the limit with an aggressive tread pattern, but it could also be the 19mm internal rim width from the mavic wheels. Anyway, great tires but I may go with something more aggressive next time around.
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HollyBoni
333 posts
#80Nov 7, 2017, 2:47 AM
Anyone here has the 40mm G-One Speed? If yes, could you measure how tall it is?
In terms of width I have space in my frame, but at the back my Vittoria Voyager 37s are almost touching the bridges at the chainstay and seatstay. But I still would like to go as big as possible.
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