SIHOO Doro S300: problems, parts and running costs

Checked: 2026-10-19

Summary

The Doro S300’s weak point is the armrests: they move freely in every direction and never lock, and the recline has only three fixed positions with no lock between them. There are no consumables, so yearly running cost is essentially zero apart from occasional replacement parts. It is a good buy at the $599.99 Sihoo US sale price (October 2026) and hard to justify at $800 or more, where established alternatives make more sense.

Common problems and fixes

Recline limited to three positions — the backrest stops at 100°, 110° and 130° with no lock at intermediate angles, and the armrests tilt upward as you recline, breaking desk alignment. One owner reported the recline mechanism failing after five months on a 4-level version, since replaced by a 3-level version. No fix beyond choosing a fixed position carefully. [2][3][8]
Lumbar support needs frequent re-tuning — some owners find the dual dynamic lumbar too aggressive, one re-tunes it about every two weeks, and another comparing it with the ErgoTune Joobie said the S300 “hurts my back as the lumbar support pushes too much”. The lumbar does not travel with backrest height, so taller users find it sits too low. [8][11][3]
Gas lift is hard to service — one owner calls it “unserviceable and enmeshed in the aluminum frame”, meaning a failure may require sending the whole chair in rather than a simple cylinder swap. Sihoo sells replacement parts and publishes a hydraulics repair guide. [8][24]
Fit for taller users — IGN’s 6'3" tester found the seat too narrow and short and the backrest not tall enough. Taller buyers should trial the chair before committing. [3]
Price at full MSRP — at $800–$1000, reviewers say the armrest and recline limitations are hard to justify; the chair only makes sense on sale. [2][3][4]

Parts and consumables

Yearly running cost

No consumables: the chair has no filters, pods or subscriptions, so a typical owner’s yearly cost is $0 [1]. Budget only for occasional replacement parts — gas lift, casters, armrest pads — whose prices Sihoo does not publish [24]. The only maintenance noted is cleaning the mesh and the chrome back panel, which accumulates dust [4].

When it is a good buy

Below $500 it is strong value: one owner paid $430 on a local online marketplace, and another was weighing the chair at $450. [9][8]
$500–650 is good value, and that is where the chair sits at the $599.99 Sihoo US sale price (October 2026) against a $999.99 list; Newegg listed it at $799.99. [7][2]
$650–800 is fair: Bed Bath & Beyond sold it at $650, a 19% saving off a $799 list (IGN, October 2024). [3]
$800–1000 is weak: at the $899–$999 MSRP the armrest and recline limits are hard to justify. [1][3]
Outside the US: €539.99 on sale from €569.99 in Germany, $949–950 AUD in Australia, and RM2,999 in Malaysia (all October 2026). [30][27][26]
Steelcase Leap or a used Herman Miller Aeron — the better choice at $500–650 if a longer track record matters more than the anti-gravity recline, since the armrest and recline limits are the consistent complaints. [2][8]
ErgoTune Joobie — the better choice if the S300’s lumbar is too aggressive for your back. [11]