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Biltwell Bonanza Helmet Liner

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Size chart (Inches)

SizeHead measurementUS Hat size
XS20⅞ – 21⅜6⅝ – 6⅞
S21½ – 226⅞ – 7⅛
M22⅛ – 22⅝7⅛ – 7⅜
L22¾ – 23¼7⅜ – 7⅝
XL23⅜ – 23⅞7⅝ – 7⅞
XXL24 – 24½7⅞ – 8⅛

Size chart (Centimeters)

SizeHead measurementUS Hat size
XS53 - 54.256⅝ – 6⅞
S54.5 - 55.756⅞ – 7⅛
M56 - 57.257⅛ – 7⅜
L57.5 - 58.757⅜ – 7⅝
XL59 - 60.257⅝ – 7⅞
XXL60.5 - 61.757⅞ – 8⅛

In order to best determine fit, we advise comparing our helmet’s measurements to a similar helmets you already own. When taking your head measurement, measure the largest circumference, usually found at your your temple.

Biltwell Bonanza Helmet Fitment

No two helmet models from different manufacturers will fit identically on the same wearer's head. For this reason, please refer to our sizing chart and follow our fitment instructions carefully before merely ordering a new helmet in the same size as the one you're currently wearing.    

Biltwell Bonanza Helmet Liner Technical Details

  • Hook and loop liner fastening
  • Brushed fleece Lycra absorbs and perspiration
  • Diamond stitch detailing
  • Cheek pads installs using button snaps
  • This liner kit only works with Bonanza helmets that have the comfort liner held in with Velcro. If yours is super old and glued in, it's time for a new lid!

Care and Maintenance

Never throw your helmet's liner and cheek pads in the washer or dryer. Instead, carefully remove the pieces and hand wash them in the sink with mild soapy water. Let them air dry 24 hours before reinstalling them to avoid dampness or mildew.

Biltwell Bonanza Helmet Liner
The product images shown may represent the range of product, or be for illustration purposes only and may not be an exact representation of the product. The products attributes e.g. colour etc. vary with each unique part number. We recommend that customers unfamiliar with the products please do so accordingly.
VAT rules and rates
Customers are subject to Value Added Tax (VAT 21%). It is a consumption tax that applies to almost all goods and services bought and sold for use or consumption in the EU.

Restore that fresh out of the box feeling with a new liner and cheek pads. One interior comfort liner and two cheek pads are included with each Biltwell Bonanza Helmet Liner kit, and installation is easy.

  • SKU: 636947130168
  • UPC: 636947130168
  • MPN: 0001-011-5703

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