Schwalbe

Excellent tires- I opted for the 50mm size and couldn't be happier. Have about 500mi on mine, so time will tell about durability, but they seem great so far. Supple, very quick rolling, and reasonably grippy on all but singletrack/loose leaves/super chunky gravel.

I raced these in a gravel race where numerous folks running the G-One RS flatted, and I had absolutely no issues, so I have to believe the added center knobs help slightly with puncture resistance on sharper gravel.

I bought these tires to replace my mountain bike tires on my new Trek Marlin 8+. I didn't feel comfortable with the tire it came with on wet tarmac surfaces, since a majority of my riding will be on paved roads. These tires reminded me of the tires I had on my BMW R1150 GS.

I have about 500 miles on the tires on various surfaces but primarily paved and they haver performed to my expectations. I would recommend these tires if you are looking to replace mountain bike tires for a more universal use.

I've used various tires over the past 9 years for gravel and have since switched over to mountain bike XC tires for most of my gravel needs as they are simply superior in pretty much every way. However, I wanted to try these tires out (along with the G-One R in 45mm which I'm less impressed with), so I grabbed a pair of these in 50mm. The RX's are very fast in a straight line. I'd put them on par with my Race King 2.0's on the straights.....however, for my terrain (Sonoran desert single and double track with varying degrees of sand over caliche and rock), the Race Kings/XC tires grip far better in the turns than gravel tires do. Now, if you're mostly going in a straight line and the terrain isn't too technical/chunky/demanding (think something like BWR Utah, which I would definitely use these RX's on) and your frame maxes out with 50mm tires, these tires would be a good option. Got them on the rim very easily, although I had to use an air compressor to get one of them to seat......easy peasy with the Park inflator head, my single best tubeless upgrade/tool. The QC at Schwalbe could be improved though as one tire weighed in at 630 grams and the other was 670 grams. Not sure why there was such a large discrepancy. They ride and roll well though, very comfortable. They don't have the cornering confidence of my Race Kings, but "gravel" tires are generally always a performance tradeoff trying to balance pavement and gravel/dirt road performance. When I'm blasting through non-technical singletrack with cacti lining both sides of the trail, cornering grip becomes exponentially important as running into a cactus (especially cholla) sucks a lot. If you're lucky enough to have dirt trails and no real consequences for sliding out in turns where you live, the cornering grip will probably be halfway decent for a gravel tire. They are a bit on the pricey side though, would be a good deal if they were about $25 less expensive.

I got the 50s for my gravel bike to soften the ride and provide more traction over tech. Previously I had the same tires in 40. I definitely notice the improvement in ride going over square edges. As for the tires themselves I've done 50+ mile road and gravel rides and they're great. I primarily ride on San Diego asphalt and offroad in the Lake Hodges area.

I'm running the 50s on a stock Trek Checkpoint SL5 2023 and they clear all the tight points. Trek says the max tire for the bike is 45 so keep that in mind. You can hit the tire with your forward foot in tight turns, but that also happened to me with the 40s. Obviously your clearance between the tire and frame is reduced so keep that in mind for clearing mud/debris.

As for the value, at $91 a pop these are getting up there, but that's right where I would expect a newer tire that seems to have a marketing push and actual professional race success behind it.