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Internet # 100663960

Model # K07090

Store SKU # 1000344350

Phoenix 55 in. Black Spiral Staircase Add Riser

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Product Details

Accessory for Phoenix spiral staircase model K07084. Up to three additional risers can be added to reach a maximum height of 148-7/16 in. Please check you floor-to-floor measurement to calculate the correct number of risers needed.
  • Interior installation
  • Additional riser kit consists of one beech wood tread, four balusters, connectors and hardware
  • Each riser will add 29.4 degrees to the rotation of the stair
  • Rise adjustable from 8-3/8 in. to 9-11/32 in.
  • Use only with model K07084
  • Important: consult your local building inspector for specifics regarding compliance with the local building codes
  • Return Policy

Additional Resources

From the Manufacturer



Dimensions: H 36 in, W 24.5 in, D 15 in


Maximum Height (in.)0 inMaximum Width (in.)0 in
Product Depth (in.)15 inProduct Height (in.)36 in
Product Width (in.)24.5 in


Color FamilyBlackColor/FinishBlack
FeaturesFasteners Included, PaintedMaterialSteel
Product Weight (lb.)32 lbReturnable90-Day
Stair Part TypeRiser

Warranty / Certifications

Manufacturer Warranty1-Year for manufacturing defects

Questions & Answers

Q:Additional Height
by|Dec 10, 2015
1 Answer
Answer This Question

A:  Thank you for your interest in the Phoenix spiral staircase kit from ARKE. For the installation height noted of 10' 8", the standard kit (adjustable to the height of 10') PLUS 1 (one) additional stair tread kit will allow you to complete the installation. You will not need any additional handrail or center pole extension to complete the installation. Should you have further questions, please feel free to contact our Customer Sales & Support team via our toll-free telephone number at (888) 782-4758. Best regards.

by|May 3, 2023
    1 found this answer helpful
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    Customer Reviews

    3 out of 5
    • 3
      out of 2 reviews
    • 100% recommend this product
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    Was very impressed
    The stairs was easy to intall. Takes a little time but well woth it. I am not a capenter but found video helpful and stair built to be easly installed. love them
    Response from Arke Product Support TeamDec 10, 2015
    We appreciate your kind words and are very pleased with the quality of the Phoenix staircase kit and the ease of assembly. We hope you enjoy many years of use of your Phoenix spiral staircase in your home. If we can ever be of assistance, please feel free to contact our Customer Sales & Support team via our toll-free telephone number at (888) 782-4758. Best regards. ArkeSupportTeam
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    • Verified Purchase
    Showing 1-2 of 2 reviews