Thrashin 1-Inch OG Riser Extensions – Black

Pair of black-anodised 6061 aluminium extensions that add 1 inch of height to compatible Thrashin OG risers. Made in the USA.

For Thrashin OG risers only; not compatible with Hole Shot risers. Standard OG-riser installation uses the supplied Grade 8 1/2-13 mounting hardware. Different bolt lengths are required when the extensions are combined with a Road/Street Glide adapter plate, Thrashin billet Road Glide top tree or Thrashin billet Softail tree. Thrashin also specifies thinner washers where additional fork-lock clearance is needed on 2024+ Bagger applications.

Adding height changes cable, brake-line and wiring requirements, so check full steering movement before riding.

• Standard OG risers: supplied 4-inch-long Grade 8 1/2-13 bolts and matching washers.
• Road Glide or Street Glide adapter plate: two Grade 8 1/2-13 × 2¼-inch socket-head screws, purchased separately.
• Thrashin billet Road Glide top tree: two Grade 8 1/2-13 × 3-inch hex bolts, purchased separately.
• Thrashin billet Softail triple tree: two Grade 8 1/2-13 × 3-inch socket-head cap screws, purchased separately.
• 2024 onwards Bagger with factory tree: thinner-profile washers are required for fork-lock clearance; manufacturer references washers from TSC-4002-0.