Specialized 12x148 Boost Rear Thru Axle 174.5mm M12x1.0
Specialized 12x148 Boost Rear Thru Axle 174.5mm M12x1.0
Stage 21 Bikes
23582 Moulton Parkway
#111
Laguna Woods CA 92637
United States
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Specialized MTB Boost Rear Thru-Axle – Non-Tapered
Factory OEM | 12x148mm | 174.5mm | M12 × 1.0 | S240200001
The Specialized Factory Replacement MTB Boost Rear Thru-Axle is a genuine OEM bolt-on axle designed for compatible Specialized mountain and Turbo mountain bikes using 12x148mm Boost rear hub spacing.
This version features a non-tapered mid-section for increased stiffness and a clean 6mm internal hex head for installation and removal. With an overall length of 174.5mm and an M12 × 1.0 thread pitch, it is used across select Stumpjumper, Levo, Kenevo, Enduro, and Demo applications.
Available from Stage 21 Bikes, your trusted source for hard-to-find Specialized OEM replacement parts.
Key Features
- Genuine Specialized factory OEM replacement axle
- Rear MTB / e-MTB application
- 12x148mm Boost hub spacing
- 174.5mm overall length
- M12 × 1.0 thread pitch
- Non-tapered mid-section
- Designed for increased axle stiffness
- Bolt-on design
- 6mm internal Allen / hex head
- Used on compatible Stumpjumper, Levo, Kenevo, Enduro, and Demo platforms
- Specialized MPN S240200001
Specifications
| Specification | Details |
|---|---|
| Brand | Specialized |
| Component | Rear MTB Boost Thru-Axle |
| Axle Position | Rear |
| Hub Spacing | 12x148mm Boost |
| Overall Length | 174.5mm |
| Thread Pitch | M12 × 1.0 |
| Mid-Section | Non-Tapered |
| Tool Interface | 6mm Allen / Hex |
| Mounting Style | Bolt-On |
| MPN | S240200001 |
OEM Compatibility
2027
- Turbo Levo R Pro
- Turbo Levo R Comp Alloy
- Turbo Levo 4 Pro
- Turbo Levo 4 Expert
- Turbo Levo 4 EVO Pro
- Turbo Levo 4 EVO Comp Alloy
- Turbo Levo 4 EVO Comp
- Turbo Levo 4 Comp Alloy
- Turbo Levo 4 Comp
- Turbo Levo 4 Alloy
- Stumpjumper 15 EVO Pro
- Stumpjumper 15 EVO Expert
- Stumpjumper 15 EVO Elite Alloy
- Stumpjumper 15 EVO Comp Alloy – SRAM Eagle 70 / FOX Rhythm
- Stumpjumper 15 EVO Comp – SRAM Eagle 70 / FOX Rhythm
- S-Works Turbo Levo R Ultralight
- S-Works Turbo Levo R
- S-Works Turbo Levo 4 X
- S-Works Turbo Levo 4 Frameset
- S-Works Turbo Levo 4
- S-Works Stumpjumper 15 EVO Frameset
- S-Works Stumpjumper 15 EVO
- S-Works Demo 11 LTD – Built for Legends
- S-Works Demo 11 Frameset
- S-Works Demo 11
2026
- Turbo Levo SL 2 Pro
- Turbo Levo SL 2 Expert Di2
- Turbo Levo SL 2 Expert
- Turbo Levo SL 2 Comp Alloy
- Turbo Levo SL 2 Comp
- Turbo Levo R Expert
- Turbo Levo R Comp
- Turbo Levo 4 Pro
- Turbo Levo 4 Expert
- Turbo Levo 4 Comp Alloy
- Turbo Levo 4 Comp
- Turbo Levo 4 Alloy
- Turbo Kenevo SL 2 Expert
- Turbo Kenevo SL 2 Comp
- Stumpjumper 15 EVO Pro – FACT 11m Carbon / FOX Factory with GENIE / X0 Eagle AXS
- Stumpjumper 15 EVO Expert – FACT 11m Carbon / FOX Performance Elite with GENIE / XT Di2
- Stumpjumper 15 EVO Expert – FACT 11m Carbon / FOX Performance Elite with GENIE / GX Eagle AXS
- Stumpjumper 15 EVO Comp – FACT 11m Carbon / FOX Performance with GENIE / S1000 Eagle AXS
- Stumpjumper 15 EVO Alloy Frameset – M5 Alloy / FOX FLOAT X Performance with GENIE
- Stumpjumper 15 EVO Alloy Comp – M5 Alloy / FOX Rhythm & Performance with GENIE / Eagle 70
- Stumpjumper 15 EVO Alloy – SRAM NX Eagle / RockShox / X-Fusion
- S-Works Turbo Levo SL 2 Di2
- S-Works Turbo Levo SL 2
- S-Works Turbo Levo R
- S-Works Turbo Levo 4 LTD
- S-Works Turbo Levo 4 Frameset
- S-Works Turbo Levo 4
- S-Works Turbo Kenevo SL 2 Frameset
- S-Works Stumpjumper 15 EVO Frameset – FACT 11m Carbon / FOX FLOAT X Factory with GENIE
- S-Works Stumpjumper 15 EVO – Shimano XTR Di2 / FOX Factory
- S-Works Stumpjumper 15 EVO
2025
- Turbo Levo SL 2 Öhlins Coil
- Turbo Levo SL 2 Pro
- Turbo Levo SL 2 Expert
- Turbo Levo SL 2 Comp Alloy
- Turbo Levo SL 2 Comp
- Turbo Levo 4 Pro
- Turbo Kenevo SL 2 Öhlins Coil
- Turbo Kenevo SL 2 Expert
- Turbo Kenevo SL 2 Comp
- Stumpjumper 15 Öhlins Coil
- Stumpjumper 15 Pro – SRAM X0 AXS / FOX Factory
- Stumpjumper 15 Expert – SRAM GX AXS / FOX Performance Elite
- Stumpjumper 15 Comp Alloy – Shimano SLX / FOX Rhythm
- Stumpjumper 15 Comp – SRAM S-1000 AXS / FOX Performance
- Stumpjumper 15 Alloy Frameset – FOX FLOAT GENIE Performance
- Stumpjumper 15 Alloy – Shimano Deore / RockShox / X-Fusion
- Stumpjumper 15 Alloy – FOX Coil
- S-Works Turbo Levo SL 2 LTD – FOX DHX Live Valve Neo
- S-Works Turbo Levo SL 2 Frameset
- S-Works Turbo Levo SL 2
- S-Works Turbo Levo 4
- S-Works Turbo Kenevo SL 2 Frameset
- S-Works Stumpjumper 15 LTD – FOX DHX Live Valve Neo
- S-Works Stumpjumper 15 Frameset – FOX FLOAT GENIE Factory
- S-Works Stumpjumper 15 – SRAM XX AXS / FOX Factory
- S-Works Enduro Frameset
- Enduro Pro
- Enduro Comp
Installation Notes
- Install using a 6mm Allen / hex wrench.
- Consult the applicable Specialized bicycle or frame user manual for the correct rear thru-axle torque specification.
- Ensure the axle threads engage cleanly before tightening.
- Do not substitute an axle based solely on 12x148mm hub spacing.
Compatibility Notes
- Rear axle application only.
- Designed for 12x148mm Boost rear hub spacing.
- Overall length is 174.5mm.
- Thread specification is M12 × 1.0.
- This version uses a non-tapered mid-section.
- Specialized uses multiple 12x148 rear axle designs with similar overall dimensions, so the axle profile and MPN must also be matched.
- Not interchangeable with 12x142 road axles or 12x157 Super Boost axles.
- Verify Specialized MPN S240200001 before ordering.
Factory-Correct Boost Replacement
Rear thru-axles can share the same hub spacing while differing in overall length, thread pitch, shoulder geometry, and mid-section profile. Matching those specifications is critical for proper frame and hub fitment.
Genuine Specialized S240200001 provides the factory 12x148mm Boost, 174.5mm, M12 × 1.0 non-tapered configuration used across select current-generation Specialized mountain and Turbo mountain bikes.
Stage 21 Bikes carries genuine Specialized factory replacement parts and hard-to-find OEM components for Stumpjumper, Levo, Kenevo, Enduro, Demo, and other Specialized platforms.