With a broad 23.5mm outer rim section at the edge of a rounded section, the 3T Accelero 40 Pro wheels create a broader, more stable base and a flatter sided profile to any tyre.
The spokes are triple butted - 18 up front and 24 at the rear - with brass nipples to counter corrosion, but the rims aren’t tubeless ready. The Pros also use a full alloy 37mm-deep rim, and they’re heavy at 1,803g.
The weight is obvious as soon as you try to kick the wheels into overdrive. They’ll get there if you’re patient, but trying to hurry them faster than their natural acceleration is a waste of breath. There’s an obvious rhythmic pulse from the wheels at lower revs/higher power outputs but no distracting power or steering flex when pushing hard.
The rounded profile takes some torquing up to speed, but once you’re there the extra momentum adds a definite flywheel effect to help you hold it. There’s a trace of stubbornness in the steering but it doesn’t get noticeably worse as speeds increase.
Gusting wind doesn’t worry them unduly either, and they’re reliably obedient even on the twistiest descents.