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What headset does a Cannondale CAAD13 (2020 on) use?

The headset fitment standard on a Cannondale CAAD13 (2020 on), and how to pick the right part.

DROPS IN
A Cannondale CAAD13 (2020 on) uses a IS42 integrated upper headset (integrated, 42 mm).
This frame's fitment
FrameCannondale CAAD13 (2020 on)
Headset standardIS42 (integrated, 42 mm)
Cup / bearing outside diameter41.8 to 42.0 mm bearing outside diameter
Steerer diameter28.6 mm (1 1/8 in)

The Cannondale CAAD13 alloy frame uses an integrated IS42 upper headset, a 27.2 mm seatpost, a 12x100 front thru-axle and, being an aluminium frame, can take a 31.8 mm clamp front derailleur or a braze-on.

Check whether your CAAD13 has a braze-on tab or a round tube; the round tube takes a 31.8 mm clamp. The bottom bracket is a BSA threaded shell, covered on its own page.

The part to buy
Search Amazon for IS42 for your Cannondale CAAD13 (2020 on)affiliate searchFind IS42 for your Cannondale CAAD13 (2020 on) on eBayaffiliate
Related fitment pages
IS42integrated, 42 mmBottom bracket for Cannondale CAAD13 (2020 on)same frame, BB shellSeatpost diameter on a Cannondale CAAD13 (2020 on)same frameIS42 on a Trek Emonda SLR (2024 on)same standard, another frame

SOURCES: Park Tool, Standardized Headset Identification System (SHIS) · BikeGremlin, Bicycle headset bearing standards (SHIS) · BikeRadar, Front derailleurs explained: types, mounts and compatibility