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Biltwell Thunder Risers
  • Biltwell Thunder Risers - Black
  • Biltwell Thunder Risers
  • Biltwell Thunder Risers - Polished
  • Biltwell Thunder Risers

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Video Review

Biltwell Thunder Risers Videos

Biltwell Thunder Risers

A large number of late-model Harley owners who prefer tall handlebars convinced Biltwell to develop the Thunder risers. This riser’s one-piece design increases riser stiffness and clamping power on rubber-mounted top trees, and is a boon to performance and style on practically any motorcycle. Bold branding is an uncommon sight on most of Biltwell's motorcycle parts, however, the Thunder Risers are an exception.


  • Investment-cast
  • CNC-machined stainless steel
  • 5/16” x 18 t.p.i. stainless steel bar clamp hardware
View Fitment Notes & Exceptions

Fitment Notes & Exceptions

This is a universal fit part; it may or may not fit without modification.

  • Rigid- and rubber-mounted top trees with 3.5” (89mm) center-to-center mounting holes only (Wide Glide, Narrow Glide, Harley-patterned aftermarket trees)
  • If your top tree has different mounting holes, the Trio riser will not fit your motorcycle
  • The holes on your trees must accept 1/2” O.D. hardware
  • Lower clamps are threaded to accept 1/2"-13 mounting hardware (not included)
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Biltwell Thunder Risers
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Product Style RevZilla Item # Manufacturer Product # Availability
Black 889793 ER175SSBK/ER-175-SS-BK In Stock: Ships within 24 hours
Polished 889792 ER175SSPS/ER-175-SS-PS In Stock: Ships within 24 hours