Spex seat base pans offer a lightweight yet very strong base, and easily install to the wheelchair frame.

The seat pan provides a solid base platform for cushions and has all the hole positions for mounting hip guides, armrests, and any other postural accessories to.

Unique design is width adjustable for growth and versatility, and to suit different wheelchair widths. Each size has up to 3 ½ inches of width adjustment to accommodate growth.

Two attachment Options available

Quick Release Mount Version

  • Standard seat pan attachment: Red clips with locking pins
  • For simple installation and removal, the quick-release system allows effortless interchange between mobility bases
  • Durable seat rail mounts are made from special buffering material - won't scrape or scratch when installing on wheelchair or placed onto floor
  • This style is not suitable for use in motor vehicle transportation

​​Hard Mount Version

  • Hard mounting clamps: Seat pan is bolted to frame. For permanent fixture to wheelchair frame (no drillings required)
  • For transit use the hard mounting clamps must be used. WC20 and ISO 16840-4 certified in motor vehicle transportation. The hard mounts bolt to the wheelchair frame


  • Provides stability and a solid foundation for the cushion to ensure no sag is present when the user is seated
  • Allows pressure distribution through over the entire cushion, avoiding pressure in any specific area
  • Ensures stability for build up seating cushions


  • Grid hole positions allow multiple uses for mounting support hardware eg. lateral pelvic/thigh supports, medial thigh support, etc
  • Rear cutout sections around back support cane mounts
  • 4 point fixation. Front 2 quick-release pins provide fast sliding removal from the wheelchair
  • Sizes from 10-20"


W/C Width Length Weight Capacity
10"/11" 12" 90 kg / 200 lb
12"/13" 12" 90 kg / 200 lb
12"/13" 14" 90 kg / 200 lb
14"/15" 14" 90 kg / 200 lb
14"/15" 16" 90 kg / 200 lb
16"/17" 16" 136 kg / 300 lb
16"/17" 18" 136 kg / 300 lb
18"/19" 18" 136 kg / 300 lb
18"/19" 20" 136 kg / 300 lb
20"/21" 20" 136 kg / 300 lb
SKU 135300017
Brand Spex

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