The 2017 isn't quiet. If you can pick up a Core for the same price, I'd go for that. The Core is effectively a quiet Kickr 17.

Other things to check/consider when looking at pre-owned smart trainers: https://www.youtube.com/watch?v=0z1pRgrpbWA

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Shane Miller - GPLama
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2017 they had no issues.
depending on how many miles/time of use - belt may need replacing sooner than an new unit.

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Hi, I bought a brand new KICKR 6 months ago and can give some insight.

1: Its a great bit of kit. Not regretted it one bit.
2: After 3 months it started making a real racket. I phoned company and they were fab to deal with. Replaced the unit.
3: Spoke to a mechanic at Majorca 70.3 who used to work for Wahoo. Told me this was not uncommon.

So I wouldn't be embarrassed to take my bike along rack it a try it out before you part with any cash.

Hope it helps.