PROX Rear Wheel Bearing Kit for BETA RR, RX, XTRAINER 2011-2027

The PROX 23.S114004 wheel bearing kit is designed for BETA RR 125, RR 200, RR 250, RR 300, RR 350, RR 390, RR 400, RR 430, RR 450, RR 480, RR 498, RR 520, RX 300, XTRAINER 250, XTRAINER 300 from 2011 to 2027. Wheel bearings carry the whole weight of the bike and take every landing, in mud, water and sand. When they develop play or feel notchy, the wheel wobbles, the disc rubs on the pads and the bike holds its line less well.

Specifications

• Brand: PROX
• Manufacturer part number: 23.S114004

When to replace it?

• Wheel play: with the bike on a stand, grab the wheel at the top and bottom and rock it.
• With the axle out, bearings that turn with tight spots or a grinding noise.
• Brake disc rubbing on and off against the pads.
• Hub seals hardened or torn, rust around the axle.

Check the wheels for play after every pressure wash or ride through water, and replace the bearings at the slightest play or tight spot. Always change all the bearings in a wheel at the same time, together with their seals: a new bearing fitted next to a worn one won't last.

Fitting tips

1. Remove the wheel, then the side spacers and the hub seals.
2. Drive the bearings out with an expanding bearing puller, or from inside the hub by pushing the centre spacer aside and tapping alternately on each side of the inner race.
3. Clean the hub, warm it slightly (around 80 °C, with a heat gun) and fit the new bearings, pressing only on the outer race.
4. Put the centre spacer back between the bearings, then fit new seals packed with waterproof grease.
5. Refit the wheel, torque the axle to the figure in the manual and check that the wheel spins freely, with no play.

Why PROX?

ProX Racing Parts has been supplying off-road riders since 1975 from its headquarters near Amsterdam. Beyond the engine and clutch, its catalogue covers chassis wear parts: wheel bearings, seals and spacers.

Spare parts and items to plan

• Grease : MOTUL 400 g
• Wheel seals : SKF VKWB-F-30-HDS-C · SKF VKWB-F-30-A
• Wheel spacers : SKF VKWB-F-30-HD-C · SKF VKWB-R-25-HD-I

Frequently asked questions

Should I change the bearings on both sides?
Yes: replace all the bearings in the wheel together, they have the same amount of wear. It's also the moment to fit new wheel seals.

What is the centre spacer for?
It keeps the bearings the right distance apart when you tighten the axle. If it's left out or badly positioned, the bearings get crushed sideways and only last a few hours.

Why do my bearings wear out so fast?
A pressure-washer jet aimed at the hub, worn seals or scored spacers let water in. Change the seals along with the bearings and avoid aiming at the hubs when you wash the bike.

Compatibility

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

Fits:
BETA RR 125 2027
BETA RR 125 2026
BETA RR 125 2025
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 200 2027
BETA RR 200 2026
BETA RR 200 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 250 2027
BETA RR 250 2026
BETA RR 250 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 300 2027
BETA RR 300 2026
BETA RR 300 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 350 2027
BETA RR 350 2026
BETA RR 350 2025
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 390 2027
BETA RR 390 2026
BETA RR 390 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 400 2014
BETA RR 400 2013
BETA RR 400 2012
BETA RR 400 2011
BETA RR 430 2027
BETA RR 430 2026
BETA RR 430 2025
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 450 2014
BETA RR 450 2013
BETA RR 450 2012
BETA RR 450 2011
BETA RR 480 2027
BETA RR 480 2026
BETA RR 480 2025
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 2017
BETA RR 480 2016
BETA RR 480 2015
BETA RR 498 2014
BETA RR 498 2013
BETA RR 498 2012
BETA RR 520 2011
BETA RX 300 2025
BETA RX 300 2024
BETA RX 300 2023
BETA RX 300 2022
BETA RX 300 2021
BETA XTRAINER 250 2026
BETA XTRAINER 250 2025
BETA XTRAINER 250 2024
BETA XTRAINER 250 2023
BETA XTRAINER 250 2022
BETA XTRAINER 250 2021
BETA XTRAINER 250 2020
BETA XTRAINER 250 2019
BETA XTRAINER 250 2018
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