Brembo 108mm M4 Front Brake Calipers (Hub Mount)

The Brembo M4 Monoblock Front Calipers deliver reliable, race-proven braking performance for serious Harley builds. Built around Brembo part number 220A39710, this caliper is known for durability, safety, and consistent feel in high-performance road use. Each caliper is machined from a single piece of cast aluminum using MotoGP-derived manufacturing methods for excellent rigidity and reduced weight.

Four 34mm aluminum pistons provide immediate brake response with strong, predictable stopping power and smooth lever feedback, even under hard riding and heat. The rigid triple bridge design increases stiffness while maintaining precise control through aggressive braking zones. Finished in anodized black or titanium grey with hand-painted Brembo red branding, these calipers deliver premium performance with unmistakable style.

These kits include HH-rated sintered brake pads, racing heat adhesive, and documentation, making this a complete front brake upgrade for riders who demand performance to the finish.

Features

• Monoblock cast aluminum body machined from a single piece for high rigidity and reduced weight
• Four 34mm aluminum pistons deliver immediate response and consistent clamping force
• 108mm radial mount spacing provides precise alignment and stable braking feedback
• Triple bridge design improves stiffness, heat control, and lever feel under load

Fitment

Touring / Bagger Models

2000–2007 FLHT — Electra Glide Standard
2000–2007 FLHTC — Electra Glide Classic
2000–2007 FLHTCU — Electra Glide Ultra Classic
2000–2007 FLHR — Road King
2000–2007 FLHRC — Road King Classic
2000–2007 FLHX — Street Glide
2000–2007 FLTR — Road Glide
2008–Present FLHTK — Electra Glide Ultra Limited
2008–Present FLHTCU — Electra Glide Ultra Classic
2008–Present FLHTKL — Ultra Limited Low
2008–Present FLHX — Street Glide
2008–Present FLHXS — Street Glide Special
2008–Present FLTRX — Road Glide
2008–Present FLTRXS — Road Glide Special
2008–Present FLTRK — Road Glide Limited
2008–Present FLHR — Road King
2008–Present FLHRC — Road King Classic
2008–Present FLHTP — Electra Glide Police
2008–Present FLHXSE — CVO Street Glide
2008–Present FLTRXSE — CVO Road Glide
2008–Present FLHTKSE — CVO Limited
2008–Present FLHRSE — CVO Road King

Softail Models (Dual Front Disc Only)
2018–Present FXBB — Street Bob
2018–Present FXFBS — Fat Bob
2018–Present FXLRS — Low Rider S
2018–Present FXLRST — Low Rider ST
2018–Present FXBRS — Breakout
2018–Present FXST — Softail Standard
2018–Present FLHC — Heritage Classic
2018–Present FLHCS — Heritage Classic 114

Check the fitment for your bike before purchasing to make sure this part is right for you. Compatible with conversion kits.

Specifications

• Position: Front
• Bolt Center: 108mm
• Caliper Body: Monoblock
• Piston Diameter: 34mm
• Piston Quantity: 4
• Piston Material: Aluminum
• Disc Height: 32–34mm
• Caliper Material: Cast Aluminum
• Finish: Black Anodized or Titanium Grey
• Weight (without pads): 1.76 lb (800g) per caliper
• Brake Pads: Included (HH-rated sintered)
• Offset: 22.5mm
• Brake Fluid: DOT 4
• Brembo Part Numbers: 220A39710, 220A39750
• Last Update: 1/17/26