What thru-axle does a Specialized Stumpjumper (2019 on carbon) use?
The axle fitment standard on a Specialized Stumpjumper (2019 on carbon), and how to pick the right part.
This frame's fitment
| Frame | Specialized Stumpjumper (2019 on carbon) |
|---|---|
| Front thru-axle | 15x110 mm Boost front thru-axle (15 mm x 110 mm Boost, front) |
| Axle diameter | 15 mm axle |
| Thread pitch | commonly M15 x 1.5 |
SHELL commonly M15 x 1.5
SPINDLE see table
SPINDLE see table
The carbon Specialized Stumpjumper uses a ZS44 upper zero-stack headset, a 34.9 mm dropper seatpost, a 15x110 Boost front thru-axle and a braze-on front-derailleur mount if a front mech is fitted.
Most builds are 1x with no front derailleur; the mount note applies only to 2x conversions. The bottom bracket is a 73 mm BSA threaded shell, covered on its own page.
The part to buy
Search Amazon for 15x110 mm Boost front thru-axle for your Specialized Stumpjumper (2019 on carbon)affiliate searchFind 15x110 mm Boost front thru-axle for your Specialized Stumpjumper (2019 on carbon) on eBayaffiliate
Related fitment pages
15x110 mm Boost front thru-axle15 mm x 110 mm Boost, frontBottom bracket for Specialized Stumpjumper (2019 on carbon)same frame, BB shellHeadset on a Specialized Stumpjumper (2019 on carbon)same frame15x110 mm Boost front thru-axle on a Santa Cruz Hightowersame standard, another frame
SOURCES: BikeRadar, Mountain bike axle standards: the complete guide · Velopedia, Boost spacing · Park Tool, Standardized Headset Identification System (SHIS)