A Giant Contend (alloy road) uses a ZS44 zero-stack upper headset (zero stack, 44 mm). The dimensions, how to confirm it on your frame, and how it compares to the neighbouring standards.
Updated 05 September 2026.
What headset does a Giant Contend (alloy road) use?
The headset fitment standard on a Giant Contend (alloy road), and how to pick the right part.
| Frame | Giant Contend (alloy road) |
|---|---|
| Headset standard | ZS44 (zero stack, 44 mm) |
| Cup / bearing outside diameter | 44.0 mm cup outside diameter, 43.9 to 43.95 mm head-tube bore |
| Steerer diameter | 28.6 mm (1 1/8 in) |
The Giant Contend (alloy road) uses a ZS44 zero-stack upper headset (zero stack, 44 mm), a 27.2 mm class seatpost, a 12x100 mm front thru-axle at the front (12 mm x 100 mm, front) and a 31.8 mm band front derailleur.
An aluminium frame may have a round seat tube rather than a braze-on tab, so a clamp front derailleur can be needed; check the tube. The bottom bracket is covered on its own page.
SOURCES: White Industries, ZS44/EC44 headset · Park Tool, Standardized Headset Identification System (SHIS) · BikeRadar, Road bike axle standards: the complete guide
Questions and answers
What headset does a Giant Contend (alloy road) use?
A Giant Contend (alloy road) uses a ZS44 zero-stack upper headset (zero stack, 44 mm).