Jasper Philipsen is racing at the Tour de France in what appear to be unreleased Shimano S-Phyre cycling shoes.The shoes look very similar to the current S-Phyre RC903 shoes, potentially with details borrowed from the PWR model thats specifically for sprinters such as Philipsen, time triallists and track cyclists.Shimano released the S-Phyre RC903 shoes in 2022 after months of teasing from Philipsens Alpecin-Premier Tech teammate Mathieu van der Poel and Lorena Wiebes, among others. So its safe to assume Shimano would get any forthcoming shoes out into the wild ahead of a release, even if we have to wait a while for an official launch.It appears Shimano has tweaked the lacing setup on Philipsens new road cycling shoes. The current RC903 has a large section of material that comes across from the instep to the outer and fastens with the upper Boa dial. However, the new shoe features a wraparound that extends only partly across the foot, like on the PWR model.Unlike the PWR, which combines a Boa dial with a Velcro strap across the toebox, Philipsens shoe still has two Boa dials. Its hard to tell from the pictures we have, but we suspect the lower Boa dial has been moved slightly further down the shoe. Jasper Philipsen (right) wearing unreleased Shimano S-Phyre shoes. Dario Belingheri / Getty Images Its possible the forthcoming model could combine Shimanos learnings around the fit at the top of the shoe or the weight-saving of a smaller overlap, with the precision and neatness of two Boa dials, which feels more in keeping with S-Phyres position as the Dura-Ace of Shimanos shoe range.The lacing on the new shoes, which could be called S-Phyre RC904, has also changed. The laces on Shimanos RC903 shoes match the overall colour. But Philipsens white shoes have contrasting black laces.Otherwise, its hard to tell what else has changed on Philipsens shoes. But if Shimanos previous S-Phyre releases are anything to go by, the new shoes will only have incremental changes rather than any drastic changes. More on the 2026 Tour de France "Its becoming hotter and hotter every year": how the Tour de France is battling extreme heat Tadej Pogaar calls for radical overhaul of cycling calendar after Tour de France stage shortened due to heatwave UCI changes Tour de France rules in light of extreme heat The Tour de France has lost some of its magic and that could spell trouble for cyclings future Forget VO2 max a Tour de France cyclist's defining quality is their frightening capacity to suffer Who is Isaac del Toro? 4 things you need to know about the Mexican who could be a future Tour de France winner A Tour de France breakaway only has a 2% chance of winning, so why join one? Every team bike at the 2026 Tour de France