Generic Thru Axle Adapter Kit for Wahoo KICKR CORE & KICKR v4+ — 12x142 / 12x148, Shimano & XDR lock nuts

Wahoo's Thru Axle Adapter Kit converts KICKR CORE and KICKR v4 (2018) and later trainers to accept bikes with 12x142 or 12x148 thru axles.

If you ride a modern thru-axle bike and want to use it on a Wahoo smart trainer, this kit supplies the drive-side and non-drive-side adapters plus the freehub lock nuts and spin cap required for a secure fit. The parts let you mount 12x142 and 12x148 frames to compatible KICKR trainers without changing your bike's axle hardware, helping preserve wheel alignment and ensuring consistent power and cadence readings.

Which axle sizes does this adapter kit support?

The kit includes non-drive-side adapters sized for 12x142 and 12x148 spacing and a drive-side spin cap to pair with them. It supports most modern thru-axle road and MTB frames that use those common rear spacing standards.

• 142 non-drive-side adapter included
• 148 non-drive-side adapter included
• Drive-side spin cap for secure seating

Is the adapter compatible with my Wahoo trainer model?

This adapter is compatible with KICKR CORE and KICKR v4 (2018) and newer KICKR models. It is not designed for older KICKR versions released prior to the v4 update.

• Works with KICKR CORE
• Works with KICKR v4 and later
• Not intended for pre-v4 legacy KICKR models

What freehub options are included and why are they needed?

The kit supplies two freehub-style lock nuts—Shimano-style and SRAM XD/XDR-style—so you can install the correct interface for your cassette and ensure the trainer’s freehub engages properly. Choose the appropriate lock nut for your drivetrain standard before mounting the bike.

• Shimano-style freehub lock nut included
• XDR/XD-style freehub lock nut included
• Install correct lock nut to match your cassette type

What parts arrive in the box and how do they fit together?

The package contains both non-drive-side adapters (142 and 148), a drive-side spin cap, and the two freehub lock nuts. The non-drive-side adapter matches your frame spacing while the drive-side cap and chosen lock nut secure the bike to the trainer’s axle interface.

• 142 non drive side adapter
• 148 non drive side adapter
• Drive side spin cap
• Shimano style freehub lock nut
• XDR style freehub lock nut

Installation is straightforward for anyone comfortable with swapping wheel hardware: remove your rear wheel, fit the appropriate non-drive-side adapter to match your frame spacing, install the compatible freehub lock nut for your cassette type, and secure the drive-side spin cap. Always hand-check engagement and torque per Wahoo’s mounting guidance before training.

Who is this for? Cyclists with 12x142 or 12x148 thru-axle road or mountain bikes who own a Wahoo KICKR CORE or KICKR v4 (2018) or newer trainer and prefer to mount their bike without changing wheel or frame hardware. It’s aimed at riders seeking a clean, OEM-style fit on their smart trainer and those who swap between bikes with different rear spacing standards.