Triumph Bonneville Brake Caliper Piston & Seal Kit Stainless Steel T2020050

Triumph Bonneville, T100, T120 & Bobber Brake Caliper Rebuild Kit

Restore smooth, reliable braking performance with this TRK front brake caliper rebuild kit for Triumph Bonneville models. Replacing the original plated brake pistons with TRK stainless steel pistons provides a permanent upgrade that helps eliminate one of the most common causes of sticking calipers. Over time, OE pistons can become corroded and pitted through exposure to moisture, road salt and general wear, leading to brake drag, uneven pad wear and reduced braking performance. Precision manufactured as direct replacements for Triumph OE part numbers T2020050 and T2020542, TRK stainless steel pistons offer outstanding corrosion resistance and help keep your front brake calipers operating smoothly for years to come.

Supplied as a complete front brake caliper piston and seal kit, this is an ideal solution whether you're carrying out routine maintenance or restoring an older Bonneville. Unlike standard plated pistons, TRK stainless steel pistons are designed to resist future corrosion, making them a genuine long-term upgrade rather than simply a replacement part. Every TRK stainless steel brake piston is backed by a lifetime guarantee, while the complete kit offers exceptional value compared with genuine Triumph components. For best results, thoroughly clean the caliper seal grooves before installation to remove corrosion and debris, allowing the new seals to seat correctly and ensuring smooth piston movement.

Motorcycle fitment

Suitable for a wide range of Triumph Bonneville models, including:

• Bonneville 800 (2001–2006)
• Bonneville 865 (2005–2015)
• Bonneville 865 Black (2007–2008)
• Bonneville 865 SE (2009–2012)
• Bonneville 865 T100 (2005–2015)
• Bonneville 900 T100 (2017–2023)
• Bonneville 900 T100 Black (2017–2021)
• Bonneville 1200 T120 (2016–2025)
• Bonneville 1200 T120 Black (2016–2021)
• Bonneville Bobber 1200 (2017–2020)
• Bonneville Bobber 1200 Black (2021)

Why choose a TRK front brake caliper rebuild kit

• Complete stainless steel piston and seal kit for Triumph Bonneville front brake calipers
• Equivalent to Triumph OE part numbers T2020050 and T2020542
• Precision-engineered direct replacement components
• Permanent upgrade over original plated brake pistons
• Superior resistance to corrosion, pitting and brake seizure
• Lifetime guarantee on all TRK stainless steel brake pistons
• Excellent value compared with genuine Triumph replacement parts

Benefits of rebuilding your front brake caliper

• Restores smooth, responsive braking performance
• Helps prevent sticking pistons and brake drag
• Promotes even brake pad wear
• Improves braking feel and rider confidence
• Extends the service life of the brake caliper

Helpful rebuild hints

• Clean the seal grooves thoroughly before installing new seals
• Remove all corrosion, dirt and road salt from the caliper body
• Inspect caliper bores for wear or damage
• Lubricate seals with fresh brake fluid or red rubber grease during assembly
• Confirm smooth piston movement before refitting the caliper

Installation notes

• Strip and inspect the caliper completely before rebuilding
• Replace all worn seals and damaged components
• Bleed the brake system thoroughly after reassembly
• Test braking performance carefully before riding