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Bearing Replacement Guide for Giant SLR 1 Carbon Wheels (2018-2021 Giant TCR)

Updated: Jul 1


If you own a 2018 - 2021 Giant TCR with the stock SLR 1 carbon wheelset, chances are you're starting to think about servicing your hubs after months or years of riding. One of the most common maintenance tasks is bearing replacement, and it’s a smart one to ensure your wheels roll smooth and fast.


We recently received a great question from a customer:

"... I have a set of Giant SLR1 carbon wheels, which I believe have DT Swiss hubs. They came with a 2021 Giant TCR. I’m looking at replacing the bearings but have no idea of the specific bearing part number to purchase. Also, I’ve never replaced wheel bearings before and was hoping you can help me..."
Alex Doherty rides with HSC ceramic bearings
Alex Doherty rides with HSC ceramic bearings

Let’s break it down step by step 👇


Are the Giant SLR 1 Hubs DT Swiss?

This is a common assumption, but no, SLR 1 hubs on the 2021 Giant TCR are not DT Swiss. They are Giant’s own in-house low-friction hubs, which use standard sealed cartridge bearings.


Bearing Size Chart for Giant SLR 1 Wheels

Here’s the most common bearing configuration we’ve seen for the SLR 1 carbon wheelset:

🔹 Front Hub Bearings:

  • 1 x 6802 (15x24x5 mm)

  • 1 x 6902 (15x28x7 mm)

🔹 Rear Hub Bearings:

  • 2 x 6902 (15x28x7 mm)

🔹 Freehub Body Bearings:

  • 1 x 6802 (15x24x5 mm)

  • 1 x 6902 (15x28x7 mm)


Please note: some variations may exist depending on production runs. It’s worth opening the end cap and checking before purchasing. Here’s a guide to help you identify the right bearing without taking the whole hub apart: 👉 Select the Right Bearing


Steel vs Ceramic – Your Upgrade Options

At BikeBearingStore.com.au, we offer two performance options:


NTN Steel Bearings – reliable, smooth, long-lasting HSC/AITA Ceramic Bearings – lighter, faster, with less rolling resistance


Shop the sizes here:

DIY or Leave It to the Pros?

Replacing cartridge bearings can be a rewarding DIY project, but only if you have the right tools and some experience. Without proper removal or press-fit tools, it's easy to damage your hub shells or misalign a bearing.


That’s why we strongly recommend visiting your local bike shop, especially if this is your first time. Many of our customers order bearings from us and bring them to a trusted mechanic for installation. You can even observe the process to build confidence for next time.


Tutorials and Tools

If you're ready to learn, we’ve got you covered with guides and videos:

How-to Guides


Helpful YouTube Tutorials

We're Here to Help

We hope this guide gives you the confidence and clarity to tackle your bearing replacement, or at least know what to ask your mechanic. Still have questions? Don’t hesitate to contact us, we’re always happy to assist.



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