I tried some Dubnitals in rapid compound with trail casing on my mtb in the rear. Grip is insane I smashed a downhill PR by almost 2 minutes vs Sunday. On the climb my times were slower for a given power compared to fast trak as the rear.
I’m going to do some more riding on it but right now it seems like it would be a bad gravel tire.
to add to what @Power13 said above,
it’s not nothing but in the grand scheme of things it’s almost negligible as you’re not completly stopping and then re-accelerating from 0. The marginal poweroutput (in W) you need to overcome going from 0-10mph is greater than from 10-20mph. And if you add 400g to a systemweight of let’s say 80kg, that’s 0.5% of an increase in weight, which is probably just noise in the data. It might make a difference for ineratia because the weight is on the wheels but I’m not sure if that matters all that much as you’re not only accelerating your wheels but the whole system. Maybe someone smarter than me can chime in on this topic.
@IamLeven interesting to read your experience with the trail casing. jkarasch tested the 2.4 Race Casing in the rapid compound to be almost as fast as the old, fast RaceKing 2.2 on Cat2 gravel. No data points for cat1/3 for RK 2.2 unfortunately
Agree, but people have weight in their head regardless of the science behind it. And what’s in your head does matter. I’ve convinced myself that the weight of my ~23lb gravel bike doesn’t matter, so it doesn’t for me. I’ve got a teammate who is a complete weight weenie and he swears that an extra couple lbs on his bike dramatically affects his performance in races. And it probably does since he feels that way.
Yeah to paraphrase Henry Ford: “Whether or not you agree that rotational weight matters, you’re right”.
The problem for your body is that he has to train harder or smarter to go as far as you do.
So maybe this is just a cheat code for us? 
Not to mention it is 2.4… One might argue that if you need a tire that big a MTB might be a better choice.
The fact that it is seemly slower than a 2.35 fast trak isnt a good indicator
There’s only so much a shop is going to put into this. Could they do a double blind perfect test that is 2 hours runtime that no one would watch until the results? Probably. I didn’t take their video as any more than a fun experiment.
Why don’t you do a better test?
Great, then we agree that it was only for entertainment purposes. I figured that out quickly and fast forwarded to their results because the entertainment wasn’t all that high.
It was so painful to watch I abandoned ship 5 min in
Let’s see… I re did some pavement tests yesterday. Peyote XC Race with the little tire hairs cut off was 0.0007 CRR slower than broken in new Dub Rapid Race 2.4 with the little hairs on them. About exactly what you’d expect comparing to the race king.
That’s with exact same CdA value btw so extract from that what ya will.
Peyote still faster on rough stuff which shows some tread compound and casing construction stuff in the mix too. Interesting
Anyway I watched the whole video and enjoyed it. I’d like to ride up there some I bet.
The span of those test results is 40 watts or so. On a course like that a change from ZERO wind to only a 1 mph wind is worth over 20 watts alone. I usually avoid one way tests so don’t have much opinion.
Temperature and air density changes can be tricky too, I’ve ran into this myself lately.
I got a new bike arriving tomorrow so I can do a bunch of 29 x 2.2 tires so this definitely got my head in planning mode haha.
Almost forgot to throw this in… finished Dubnital Rapid Race 29 x 2.2 testing a few days ago!
Pretty legit vs the Race King.
Thank you for your service!!!
I might be a bit confused by naming conventions, but is the TB SG 2.1 that BRR has just tested as very poor performing (yesterday) the same one that tops your chart?
Yes, same tire. I’ve tested them many times including pavement and I’m down around lowwww 0.0040 CRR range at 25 psi on them. This is smooth pavement and usually about 0.0005 CRR value faster than BRR drum so they stack up as I expected vs the prior tests BRR did on SG 2.25.
Nick Dart is on here and has tested Sg vs Sr before on his blog HERE.
I guess there are all the normal BrR caveats such as one tire sample, possibly a bad tire, super narrow rim, etc. … i’m not trying to cast any doubt on what he does there btw.
To summarize this, I have a back up pair of the identical tires tested here and I’m definitely not about to sell them based on seeing that test hah. Hope that helps.
It does seem like the results of the 2021 TB Super Ground on BRR is a bit of an outlier. I think that result also factored in to Dylan Johnson opting for the Super Ground. However Schwalbe have been claiming that the Super Race is faster and offers only marginally less puncture protection, so their own sponsored riders tend to use Super Race. The testing Nick Dart did is in alignment with what Schwalbe has been saying. I’ve personally opted to stick with Super Race casings over the past couple of years.
That all being said, the results of the 2.1 TB SG on BRR aren’t really bad, but rather just similar to the other recently tested Schwalbes and just slightly behind the 2024 2.1 TB Super Race, which again makes sense. The 2021 TB SG seems to be the outlier.
Call me picky, but the opening line of the conclusion for this Thunderburt on BRR is that they are not impressed… Yet then it scores 4/5 and it’s recommended???
And they recommend the super race carcass yet it’s one of the previous super ground tyres that comes out well??
Are they splitting hairs or are Schwalbe’s tyres and compounds just inconsistent?? 
Worth reminding; the 2021 TB SG was tested with a tube and the CRR values modified against a conversion factor to estimate tubeless CRR.
4/5 isn’t good when looking at the top end of tyre results, so I assume when they say unimpressed, they mean versus expectation (and the fact they come up so heavy versus advertised).
I guess the fact it is so overweight suggests there could be a lot of manufacturing variance, and maybe you need to win roulette to get a lightweight / fast rolling one.
The manufacturing variance is actually impressively low. The 3 tested Thunder Burts are respectively 65, 66 and 63 g over specified weight! So that doesn’t seem to be the issue.
Interestingly, this seems to only be an issue with the Thunder Burt, all the other Schwalbe tires are more or less to spec.
Anyway, now I’m just curious how the Super Race would perform in the real world. Badly I hope, because I don’t want tan walls.
Did someone post Drew’s video yet?
