There is little debate about it: the Achilles Heel of Tacx Neo products is the introduction of disc brakes on modern bicycles. The calipers and hoses for rear brake systems tend to be positioned such that they press against the Neo housing.
While it’s not clear what impact the pressure between the Neo housing and the brake connection would have, most cyclists agree they don’t want any part of their bike touching the trainer to prevent damage to the bike, the brakes, or the trainer itself.
Tacx’s solution is, and has been, to widen the rear triangle of the bike frame slightly by introducing a spacer that sits between the non drive side Neo insert and the Neo frame. Typically, the spacer is supplied in response to a Tacx support case.
Neo OG and Neo 2
For Neo models prior to Neo 2T, you will still need to contact Tacx support to acquire the appropriate spacer. For both Neo OG and Neo 2, the part number is S2850.06 – 2.7mm Disc Brake Adapter
For owners with 142mm frame spacing, Tacx support may also suggest that you attempt to use the included 135mm dropout spacer supplied with all version of Neo and Neo 2, part number T2805.06
If you are using a Boost setup with 148mm frame spacing and require additional clearance for your disc brakes, you will need the S2805.06 spacer. Tacx have not commented on the suitability of this solution with respect to thread depth on the non drive side insert.
For Neo 2T models prior to November 2019, you will need to contact Tacx support to acquire the appropriate spacer. The part number is S2875.07 – Ring Spacer 2.7mm
For Neo 2T models manufactured November 2019 and later, the spacer is now included with your Neo 2T. The Assembly Manual has also been updated. The new part number for the spacer is T2844.15
We are also aware that there is a 4mm spacer available by request for Neo 2T versions, but we have not seen it in the wild and do not have a part number for it. If you do, drop us a note! We’d love to hear from you.
For Neo models generally, the “T” prefix designates an original Tacx part supplied during manufacture. The “S” prefix designates a post-sales Spare parts item.