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Hardrock Chair
The Smirthwaite Hardrock Chair is a durable, robust seat built for children through adults who show repetitive rocking behaviors. It gives moderate postural support and creates a stabilizing environment at school or at home. Smirthwaite describes it as a secure, structured space that minimizes distractions and promotes focus.
- Ships across the lower 48
- Service and repair in Georgia
- In business since 1990
- Built for repetitive rocking
- Anti-thrust seat, anterior pad
- Moderate postural support
- Size 5 up to 331 lb
About the Hardrock Chair
The Smirthwaite Hardrock Chair is a durable, robust seat built for children through adults who show repetitive rocking behaviors. It gives moderate postural support and creates a stabilizing environment at school or at home. Smirthwaite describes it as a secure, structured space that minimizes distractions and promotes focus.
Heavy-duty construction is made to stand up to rigorous daily use, continuous movement and high-impact rocking. An anti-thrust seat structure and an anterior pad keep pelvic alignment secure within defined boundaries. For users who move sideways, optional thoracic supports and stabilizers are available.
The standard kit depends on size: sizes 2 and 3 come with adjustable armrests, an anti-thrust cushion, a tray, a buckle pelvic strap with pad and a transporter base of skis with transporter wheels and an integrated footboard. Size 4 has the same armrests, cushion, tray and strap on a mobile base with push handle. Size 5 extends the range to larger teens and adults, with a 331 lb maximum user weight. Each chair arrives fully assembled apart from any special accessories ordered.
Custom Mobility ships the Hardrock across the lower 48. Smirthwaite warrants it against defects in materials and workmanship for 2 years from the date of delivery. Call us to talk through sizing and options.
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Key specs
- Seat height (Size 2)
- 10.2-16.1 in
- Max user weight (Size 2)
- 132 lb
- Seat height (Size 3)
- 11.4-17.3 in
- Max user weight (Size 3)
- 154 lb
- Seat height (Size 4)
- 14.8-20.7 in
- Max user weight (Size 4)
- 198 lb
- Seat height (Size 5)
- 16.7-21.7 in
- Max user weight (Size 5)
- 331 lb
- Product weight (Size 2)
- 77 lb
- Product weight (Size 5)
- 132 lb
- Back height (Size 5)
- 25.6 in (high back)
- Base (Size 2, Size 3)
- transporter base
- Base (Size 4)
- mobile base with push handle
Specifications as published by Smirthwaite: maker's spec sheet.
What's included
- Size 2 and Size 3: adjustable armrests, anti-thrust cushion, tray, buckle pelvic strap with pad, transporter base
- Size 4: adjustable armrests, anti-thrust cushion, tray, buckle pelvic strap with pad, mobile base with push handle
Warranty
The maker's warranty for this model.
- Materials and workmanship: 2 years from date of delivery
- Excludes accident, neglect, misuse, not following the instructions, and normal wear and tear
- A charge may apply where goods cannot be repaired under the warranty; you are advised first
- Claims: Smirthwaite Customer Services advises on next steps
- In addition to your legal rights
Repairs and replacements under warranty are processed in coordination with the manufacturer.
Shipping and delivery
- Delivered with a lift gate. Orders that include Smirthwaite products carry a $175 lift-gate charge, added at checkout. It is a lift-gate charge, not a shipping cost, and it applies whatever the order total. Ships within the lower 48 (the 48 contiguous states and Washington, DC).
- Ships to the contiguous US (lower 48) only.
- Most orders are processed within 2-5 business days; some brands differ.
- Shipping is free to the customer on online orders over $500.
- We cover sales tax on every online order.
Service and repair are in Georgia.
Why buy from Custom Mobility
Custom Mobility is My Mobility.
- Since 1990The company was founded in 1990 and has operated continuously since.
- Georgia installation and serviceOur technicians are mobile and come to your home, facility, or fleet yard anywhere in Georgia.
- Ships across the lower 48Products ship across the lower 48.
- We service what we sellWith our own technicians, from the same company that sold it.
- A showroom in AthensWalk-ins are welcome at 315 Whitehead Road.
Common questions
Can I try equipment before buying?
Yes. Come to the showroom in Athens or ask for an in-home evaluation.
Will it fit in my car?
Ask this at the start rather than after delivery. Folding and travel models go in a trunk. A full-size chair needs a vehicle lift or a conversion, and we do those too.
Do you ship outside Georgia?
Yes. Products ship across the lower 48. Installation and service are Georgia.
Do you service what you sell?
Yes, with our own technicians. The person who comes back is from the same company as the person who installed it.
Will you service equipment somebody else installed?
Often, depending on the platform and whether we hold the relationship with that manufacturer. Tell us what you have.
Can I just come to the showroom?
Walk-ins are welcome in Athens, at 315 Whitehead Road. Appointments are better, because it means the right person is there when you arrive.
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Questions about this product?
Talk to a mobility specialist, or ask for a free consultation.
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Schedule Your Free Consultation
Tell us what you need. A mobility specialist will respond shortly. Installation and service are in Georgia.
To request a free consultation, call (706) 247-8868 or email info@custommobility.net.