evo.com | Stan's NoTubes Wheels > Magnets: we know how they work! Instead of pushing each pawl out into the ratchet ring, the M-pulse hub at the heart of a Stan's NoTubes Flow MK4 Wheel uses neodymium magnets to pull them into place. This simplicity greatly increases longevity, which along with individually-shielded Enduro bearings, mean you'll be coasting along more efficiently for longer. At the other end of the double-butted spokes are Stan's excellent Flow rims, with all their bead-holding, impact-resisting, straight-rolling glory. 32 Hole Shimano MicroSpline or SRAM XDR 6-Bolt Rotor Style Pre-Installed Tubeless Tape and Presta Valves Stan's M-pulse Stan's most advanced hub features ultra-low drag magnetic pawls with 1.66deg engagement. | Stan's NoTubes Flow MK4 Wheel 29 2025 - Rear, 12x148mm, 6-Bolt, XDR in Black Size Rear 12X148mm 6-Bolt Xdr