ALL BALLS Brake Caliper Rebuild Kit for BETA RR 250, RR 300, RR 350, RR 390, XTRAINER 300 2005-2027

ALL BALLS offers this brake caliper rebuild kit for BETA RR 250, RR 300, RR 350, RR 390, XTRAINER 300 2005-2027. The caliper is the clamp that squeezes the pads onto the disc. Inside, one or more pistons are pushed out by the brake fluid when you pull the lever or press the pedal.

Why rebuild the caliper?

The benefits:

• Pistons that slide freely: the pads stop rubbing and wear evenly.
• Precise, consistent braking, even after muddy rides and repeated washing.
• You keep your original caliper, already matched to the bike.

Why choose ALL BALLS?

Complete All Balls kits: low-friction bearings and steel-spring nitrile seals, everything you need in one box.

When should you replace this part?

A brake that drags or runs hot, pads worn at an angle, a scored, pitted or sticking piston, fluid around the piston: the caliper needs rebuilding.

Specifications and fitting tips

• Manufacturer part number: 18-3315

Cross-Mania tip: Clean the seal grooves without scratching them (plastic or wooden tool), coat seals and pistons with fresh brake fluid, grease the slide pins with a brake-compatible grease, then bleed the system.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
BETA RR 125 2024
BETA RR 125 2023
BETA RR 125 2022
BETA RR 125 2021
BETA RR 125 2020
BETA RR 125 2019
BETA RR 125 2018
BETA RR 125 2T RACE 2025
BETA RR 125 2T X-PRO 2026
BETA RR 125 2T X-PRO 2025
BETA RR 200 2024
BETA RR 200 2023
BETA RR 200 2022
BETA RR 200 2021
BETA RR 200 2020
BETA RR 200 2019
BETA RR 200 2T RACE 2026
BETA RR 200 2T RACE 2025
BETA RR 200 2T X-PRO 2026
BETA RR 200 2T X-PRO 2025
BETA RR 250 2024
BETA RR 250 2023
BETA RR 250 2022
BETA RR 250 2021
BETA RR 250 2020
BETA RR 250 2019
BETA RR 250 2018
BETA RR 250 2017
BETA RR 250 2016
BETA RR 250 2015
BETA RR 250 2014
BETA RR 250 2013
BETA RR 250 2007
BETA RR 250 2006
BETA RR 250 2005
BETA RR 250 2T RACE 2026
BETA RR 250 2T RACE 2025
BETA RR 250 2T X-PRO 2026
BETA RR 250 2T X-PRO 2025
BETA RR 300 2024
BETA RR 300 2023
BETA RR 300 2022
BETA RR 300 2021
BETA RR 300 2020
BETA RR 300 2019
BETA RR 300 2018
BETA RR 300 2017
BETA RR 300 2016
BETA RR 300 2015
BETA RR 300 2014
BETA RR 300 2013
BETA RR 300 2T RACE 2026
BETA RR 300 2T RACE 2025
BETA RR 300 2T X-PRO 2026
BETA RR 350 2024
BETA RR 350 2023
BETA RR 350 2022
BETA RR 350 2021
BETA RR 350 2020
BETA RR 350 2019
BETA RR 350 2018
BETA RR 350 2017
BETA RR 350 2016
BETA RR 350 2015
BETA RR 350 2014
BETA RR 350 2013
BETA RR 350 2012
BETA RR 350 2011
BETA RR 350 4T RACE 2026
BETA RR 350 4T RACE 2025
BETA RR 350 4T X-PRO 2026
BETA RR 350 4T X-PRO 2025
BETA RR 390 2024
BETA RR 390 2023
BETA RR 390 2022
BETA RR 390 2021
BETA RR 390 2020
BETA RR 390 2019
BETA RR 390 2018
BETA RR 390 2017
BETA RR 390 2016
BETA RR 390 2015
BETA RR 390 4T RACE 2026
BETA RR 390 4T RACE 2025
BETA RR 390 4T X-PRO 2026
BETA RR 390 4T X-PRO 2025
BETA RR 400 2014
BETA RR 400 2013
BETA RR 400 2012
BETA RR 400 2011
BETA RR 400 2010
BETA RR 400 2009
BETA RR 400 2008
BETA RR 400 2007
BETA RR 400 2006
BETA RR 400 2005
BETA RR 430 2024
BETA RR 430 2023
BETA RR 430 2022
BETA RR 430 2021
BETA RR 430 2020
BETA RR 430 2019
BETA RR 430 2018
BETA RR 430 2017
BETA RR 430 2016
BETA RR 430 2015
BETA RR 430 4T RACE 2026
BETA RR 430 4T RACE 2025
BETA RR 430 4T X-PRO 2026
BETA RR 430 4T X-PRO 2025
BETA RR 450 2014
BETA RR 450 2013
BETA RR 450 2012
BETA RR 450 2011
BETA RR 450 2010
BETA RR 450 2009
BETA RR 450 2008
BETA RR 450 2007
BETA RR 450 2006
BETA RR 450 2005
BETA RR 480 2024
BETA RR 480 2023
BETA RR 480 2022
BETA RR 480 2021
BETA RR 480 2020
BETA RR 480 2019
BETA RR 480 2018
BETA RR 480 4T RACE 2026
BETA RR 480 4T RACE 2025
BETA RR 480 4T X-PRO 2026
BETA RR 480 4T X-PRO 2025
BETA RR 498 2014
BETA RR 498 2013
BETA RR 498 2012
BETA RR 520 2011
BETA RR 520 2010
BETA RR 525 2009
BETA RR 525 2008
BETA RR 525 2007
BETA RR 525 2006
BETA RR 525 2005
BETA RX 250 2026
BETA RX 300 2025
BETA RX 300 2024
BETA RX 300 2023
BETA RX 300 2022
BETA RX 300 2021
BETA RX 350 2026
BETA RX 450 2026
BETA RX 450 2025
BETA RX 450 2024
BETA XTRAINER 250 2026
BETA XTRAINER 250 2025
BETA XTRAINER 250 2024
BETA XTRAINER 300 2027
BETA XTRAINER 300 2026
BETA XTRAINER 300 2025
BETA XTRAINER 300 2024
BETA XTRAINER 300 2023
BETA XTRAINER 300 2022
BETA XTRAINER 300 2021
BETA XTRAINER 300 2020
BETA XTRAINER 300 2019
BETA XTRAINER 300 2018
BETA XTRAINER 300 2017
BETA XTRAINER 300 2016
BETA XTRAINER 300 2015