A 34-tooth inner ring on a 145mm BCD spider is the compact-adjacent setup a lot of riders reach for once climbing gradients start mattering more than top-end speed — enough range to keep cadence sane on a steep pitch without the drivetrain feeling mismatched on the flat. This is the genuine Campagnolo Super Record 12-speed ring, built to that exact BCD standard rather than a generic aftermarket approximation.

What you're actually getting:

• 34T ring, 145mm BCD — matches Super Record 12-speed cranksets specifically, no adapter or spacer workarounds needed
• Complete kit — ring plus the mounting screws required for installation, so you're not left sourcing hardware separately or guessing torque specs with mismatched bolts
• Shift ramps engineered for 12-speed indexing — tooth profile and ramp placement built around Super Record's shift timing, which is where a cheaper ring usually falls short under load
• Durability for race-day stress — construction built to hold shape and shift crisply through a full season of hard efforts, not just the first few rides

Swapping to a 34T inner ring is one of the simpler ways to open up climbing gears without touching the rest of the drivetrain — worth pairing with a look at your current Cassettes range to make sure the overall spread still matches your terrain. If you're replacing rather than adding, check our Cranksets for full crank compatibility, or Chainrings (bolts...) for other ring sizes and bolt kits.

For full compatibility specs, see Campagnolo Super Record official page.