Paris-Roubaix is nearly upon us, and for bike tech nerds, it’s arguably the biggest race of the year, surpassing the Tour de France in terms of innovations of interest, and perhaps is only rivalled by the Critérium du Dauphiné (or the Tour Auvergne-Rhône-Alpes, to give it its new name) in terms of cool things to see.
This year will be my third in a row covering the Hell of the North, and the previous two years have definitely seen some well-established trends. Aero bikes are now the norm, and while the days of dedicated Roubaix bikes are behind us, thanks to the advent of disc brakes allowing wider tyre clearances, advances in our understanding of rolling resistance have seen some teams buck this trend and opt for endurance or even gravel bikes.
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Wider tyres everywhere
This is hardly breaking news, but tyres have been getting wider every season over the past several years, both in normal road races and on the cobbles. Plenty of riders are running 30mm tyres as standard now, and on the cobbles, the most common size last year was 32mm, which happened to be the largest size that Continental offered in the GP5000 S TR, and Vittoria offered in the Corsa Pro, the most common race tyres in the bunch. Fred Wright was spotted in 2024 using 35mm GP5000 AS TR tyres, but he was in the minority.
Since then, Continental has launched a 35mm variant of the GP5000 S TR, which was the fastest non-time trial tyre we tested in a recent lab test, and so I expect anyone who can cram it into their frames will be doing so.
Vittoria now offers the Corsa Pro Control, a slightly slower and slightly more durable offering than the standard Corsa Pro in sizes up to a UCI-illegal 42mm, but I don’t expect Visma – Lease a Bike et al to be running these, despite my Visma-related predictions at the end of this article.
You’ll have to read our separate story to find out what the widest tyre we expect to see is.
1x everywhere, except for Alpecin

Last year, a great many teams, Shimano-sponsored or SRAM, ran 1x systems. A…
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