Running two different models front and rear is smart. The front tyre is where steering feel and confidence live. Lean too aggressively up front and unfamiliar terrain gets twitchy; lean too smoothly and you lose bite exactly when you need to trust the front wheel most. The rear, meanwhile, can afford to be a bit wilder. It’s chasing traction and acceleration out of loose corners, not predictability. And if this all sounds like a sommelier describing a fine wine: we gravel cyclists are connoisseurs, so yes, this is a fine science.
Schwalbe’s own range makes this pairing an easy call. The R PRO is built as the all-rounder, the tyre Schwalbe pitches as the ideal mix of grip, smoothness and low rolling resistance, especially when the road ahead is unfamiliar. That description does a lot of the work explaining why it belongs on the front wheel: predictable, confidence-inspiring and just as happy on asphalt link-ups as on packed gravel. Sadly I still haven’t found a 100% gravel loop, so that versatility is very welcome.
The RX is the more aggressive sibling and, sitting a tier below Schwalbe’s PRO line, the affordable workhorse of this pairing. It’s built for rougher surfaces: loose ground, rocky gravel, muddy trails. That is its home turf, and the tread is shaped accordingly. What’s clever is that Schwalbe hasn’t sacrificed the road entirely for the sake of the dirt: the boomerang-shaped centre tread keeps the rear rolling smoothly even when the route drops back onto tarmac between gravel sectors.
Vaasa’s gravel roads swing between hard-packed forestry tracks, loose sandy gravel and the occasional stretch of proper Nordic rubble, so this test never lacked variety. On the smoother, faster sections, the kind where the evening sun cuts low through the pines and the whole forest smells of resin and warm dust, the front R PRO stayed composed. No wandering, no vague moments in tight curves, just a quiet confidence that let me look at the trail ahead rather than worry about the tyre underneath me.
Where the setup earned its keep was on the loose stuff: soft gravel corners, short punchy climbs out of loose pits, the odd root-strewn shortcut through the forest. The RX’s aggressive tread bit down and drove the bike forward exactly when I needed it to, without turning the rear into dead weight on the asphalt connectors between trailheads.
The 100 km bikepacking leg was the real test of endurance rather than outright grip: fully loaded, on unfamiliar tracks, with tired legs by the final hours and the light going soft and golden over the trees. This is precisely the scenario where a front tyre needs to be boring in the best possible sense, and the R PRO delivered: stable under the extra weight, unbothered by the constant surface changes and never once a source of second-guessing.
Now, about that 3 km/h. If you had physics in school, and maybe paid more attention to the teacher than I did, this might make complete sense to you. For me it was a genuine surprise: my average speed on these wider tyres went up to 26 km/h, from 23 km/h on the old 40 mm set. The common logic, after all, is that wider tyres make you slower. The short version of why they don’t: a wider tyre run at lower pressure deforms less dramatically over rough ground, so instead of bouncing and vibrating away your energy, the supple casing absorbs the surface and keeps you rolling. On gravel, comfort literally is speed. I certainly wasn’t training through the long Finnish winter, so the gain belongs to the tyres (and, I like to think, a miraculous small increase in fitness).
At 45 mm, both tyres sit in the sweet spot for the terrain I ride: enough volume to soak up rough gravel and hold a confident line, without ballooning into something that feels sluggish the moment the route turns to tarmac. It’s a width that rewards riders who genuinely mix surfaces rather than sticking to one type of terrain all day, which coincidentally describes most Nordic gravel riding rather well. For the record, I ran the pair tubeless at 29 PSI front and 35 PSI rear, loaded and unloaded alike, and never felt the urge to fiddle.
No tyre is for everyone, and pretending otherwise would make this less of a gear test. So, honestly: if your riding is mostly fast tarmac with the occasional smooth cycle path, the RX’s rear tread is more tyre than you need. A matched pair of R PROs (or something slicker still) will serve you better. In deep, wet mud the RX copes but doesn’t excel; this is a rough-gravel tread, not a cyclocross one. And the practical hurdle: your frame might simply not clear 45 mm tyres. Though if it doesn’t fit, that is a very good reason to buy a new bike, because you really do want to ride these in 45 mm.
After 500 km, both tyres show only even, unremarkable wear: no cuts, no sealant drama, the knobs on the rear barely rounded. Ask me again in another 500 km, and another, longer bikepacking trip (for which Schwalbe does recommend the Overland PRO, by the way).
Running the R PRO front and RX rear isn’t just a clever pairing on paper: it held up over 500 km of genuinely varied Nordic gravel without a single moment that made me question the choice. If your riding mixes asphalt connectors with proper rough stuff, this asymmetric setup deserves a place on your shortlist. Fast, confidence-inspiring and quicker on asphalt than a tyre this capable has any right to be.
Where we’d take them: the flowing gravel of the Belgian coast in autumn, the endless forestry roads of Finnish Lapland. Or, if you’re feeling ambitious, all eight countries of the EuroVelo 12 around the North Sea.
Schwalbe provided the tyres for this test as part of a paid partnership. As always, the riding, the opinions, and the verdict are entirely our own.
Schwalbe means ‘swallow’ — a nod to the Korean symbol of good luck the brand borrowed when it launched in 1973. The German family company builds nothing but bicycle tyres, running its own test labs and pioneering the industry’s first tube and tyre recycling programmes. Quietly stubborn craftsmanship, built to disappear from your thoughts entirely.
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