Triple Tree Reversible Bottom Clamp 50/55 2.375" Upside Down Forks Conversion

Brock’s Performance has professionally designed and fabricated V-Twin Triple Trees with Reversible Bottom Clamp which will allow conversion of select Harley-Davidson® FXR™, Dyna™ and Sportster™ forks to late model upside-down (inverted) sportbike forks to take your riding to the next level.

These triple clamps not only allow the use of readily available OEM forks (GSX-R1000, Hayabusa, etc...,) but also simultaneously add the ability to use corresponding wheels and brakes, increasing overall suspension performance and comfort while providing world class braking options.

Featuring zero (1-1) rake and the stock 2 3/8" Dyna offset (optional 1.7” reduced trail option available), we also accommodate the stock fork stops and lock (when possible).

Available in 50/54 with a 207mm spread (GSX-R1000) and 50/55 with a 214mm spread (Hayabusa).

See overview and technical tabs for more info. Proudly made in the USA.

• Direct bolt-on triple clamp for popular Harley-Davidson® models
  (See product details tab for listing of known fitment applications)
• Allows use of popular OEM upside-down (inverted) sportbike forks
• Reversible lower clamp for maximum fork height adjustability
  
• Lower clamp is tapped for fork stops and a clearance hole for headlight mounting
• Upper clamp is tapped for headlight eyebrow
• Accepts handlebars with a 3.5" center-to-center spacing
• Threaded steering stem and jam nut to allow proper setting of bearing preload
• Steering stem is threaded 5/8"-18 for steering stem bolt
• Two (2) 5/16”-18 threaded holes for fork stops
• One (1) 3/8” clearance hole for headlight mounting
• Uses OEM H-D® (1" ID) bearings and seals (not included)
• Stock Dyna™ offset of 2.375" for 18"+ wheels sizes
• 214mm fork spread center-to-center e.g. Gen 2 Hayabusa
• CNC machined 6061-T6 billet aluminum upper and lower clamps
• 300 series stainless steering stem
• All stainless steel hardware
• Laser engraved logo
• Natural finish
• Weighs only 5.8 lb.
• Designed, machined and assembled in the USA

Known Fitment Applications:

• Harley-Davidson® FXR™ (87-94) (Including CVO)
• Harley-Davidson® Dyna™ (90-17)
• Harley-Davidson® Sportster™ (87-03)

All remaining years of FXR™, Dyna™ and Sportster™ will accept the clamp with small modifications. The clamp will also fit custom applications utilizing a 1” DIA Harley-Davidson® steering stem. This is a bolt on application for any frame with the fork stop on the front of the neck; all other frames will require a fabricated fork stop.

Triple Tree Weight Breakdown:

• Upper clamp – 29.6 oz. (839g)
• Lower clamp – 33.2 oz. (941g)
• Steering stem – 26.4 oz. (748g)
• Jam nut – 1.1 oz. (31g)
• Hardware – 2.6 oz. (74g)

Total = 5.8 lb. (2.63 kg)

• 1987-1994 Harley-Davidson® FXR (Including CVO)
• 1990-2017 Harley-Davidson® Dyna
• 1987-2003 Harley-Davidson® Sportster

Manufacturer's Warranty

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