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The thru axle with a length of 170 mm might be suitable for your bike as it is only about 1.3 mm longer than your current axle of 168.7 mm. This could work, depending on the specific construction of your bike and the way it is mounted. It is advisable to check the compatibility with your Scott Addict model to ensure that the thru axle fits easily and can be mounted securely.

I have the same measurements as you Luca and it fits perfectly. It doesn't come with an adapter ring that you can leave out so that it fits better in length.

So if they are the same dimensions, it should fit. In my case, 1 cm was still missing. I then lengthened the axle in the middle myself. With a lathe and some Now how. ;-))

Your axle has a thread of M12 pitch 1.0. (The model mentioned above has a pitch of 1.5). According to the compatibility list from Thule (https://static.digitecgalaxus.ch/Files/1/8/0/1/9/4/9/9/IN_Adapter_Fit_Guide_ALL.pdf) you need this model: Brand:Syntace Min-Max Lenght: 160 - 172 (Your axle is 171.5 long) Overall Lenght: 199 Therad Pitch:M12x1.0 (Your axle has a thread of M12x1) Thule Part #: 20110733 Install: Groove

The length and diameter fit. The 1.5mm shorter almost certainly does not matter. But now the thread needs to be clarified. If your existing thru axle has a thread M12x1.5, i.e. a metric 12mm thread with a pitch of 1.5mm, then everything fits. The chances are great that it will fit.