I bought the 40c race variant. Weight: 486/492 grams (475g spec). Grr...hate when tires are heavier than spec. Almost returned them, but didn't. No issues with mounting, using TPU tubes. First ride was 61 miles, 4.1k gain, 35% gravel. PSI per silca app, at the high end.
Sweet mother--these are indeed fast tires. Impressive on tarmac. So, I'm expecting them to be mediocre on gravel...but no, they grip very well. Almost shocking so. Climbing, descending, loose turns--all very good. Supple ride as well, better then sbc s-works pathfinder.
Damn The French. Never can be relied upon (I am French heritage so I know). In the end, these will be my go-to tires. Mon Dieu!
I purchased these with high expectations - thought they were a step up from the multi exit SH-56 cleats. Glad I tried them out before my Arizona trip.
I am not quite sure what Shimano tried to accomplish with these cleats - they work but for me not as well as the SH-56. As soon as I put them on I went back to the SM-SH56. I did not feel I could get out of them as quickly and easily as I liked for mountain biking. Maybe for gravel biking they are ok, but so are the SM-SH56. I still prefer SPD over platform pedals and the SM-SH56 in the lowest retention setting are a good compromise for me.
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.
