FSA SX Pro Internal Headset
Lists today at $98 per set
Own a FSA SX Pro Internal Headset?
Track its value in your garage, or list it for sale locally in a few taps.
What a used one is worth
New
$98
$83 to $98
Like new
$93
$79 to $98
Excellent
$88
$75 to $97
Good
$74
$62 to $81
Fair
$54
$46 to $59
For parts
$29
$25 to $32
From the current list price, adjusted for condition. Guidance from our catalog, not an appraisal.
Overview
- Brand
- FSA
- Model
- SX Pro Internal Headset
- Model number
- No.55
- Type
- Headset
- Years
- up to 2026
- Current list price
- $98 per set (as of 2026-09)
Compatibility
- Shis
- ZS44/28.6, ZS55/39.78
Specifications
- Type
- zero_stack
- Bearing
- 36°/ 45° ACB
- Steerer
- 1-1/8" to 1.5" tapered fork
From FSA USA's own web store (fsaproshop.com, linked from FSA's site as its US webstore); fullspeedahead.com refuses automated requests, so it was not used. The store lists this model under 2 part numbers; each is a variant with its own price. S.H.I.S. codes are copied as FSA writes them (FSA uses exact bores such as 49.57 and a 39.78 crown race) and are null where the store gives only head tube outside diameters. Launch years are not published. FSA also sells this model as No.55.