Bearingnumber Calculator

(6)802 - This first number relates to the bearing type, typically most bicycle bearings will be a “6” which is a “Deep Groove”. Occasionally you will find a “7” bearing which is a “Single Row Angular Contact”

Wheel bearings in particular are generally not considered when you’re buying those shiny, slick, aero carbon wheels but in fact, the bearings are one of the most crucial elements of your wheel and here at Scribe, we have put a lot of thought into them.

Bearingnumber identification pdf

If you've ever searched for any bearing, they each have their own terminology for the seal type and this handy table below should help you understand the main brands, seal and lettering used!

Bearings are a component that you generally don’t give too much thought to as you don’t see them and you kind of forget that they’re there as they go about silently doing their job. They are a crucial, often overlooked component however as they are needed to help you move and most importantly, move fast!

6(8)02 - This second number relates the bearing series, which reflects the robustness of the bearing. As you go up the scale below from 9 to 4 the inner and outer race thickness will usually increase along with the ball size, this will be to help cope with extra load.9 - Very thin section0 - Extra light1 - Extra light thrust2 - Light3 - Medium4 - Heavy

Bearingnumber and size chart pdf

As riders ourselves, we know it's the small things that make the difference; especially when it comes to bearings. As many of us like to ride our bikes everywhere, regardless of the weather, we give you the option to run a Race or Endurance bearings.

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The Oxford Learner’s Thesaurus explains the difference between groups of similar words. Try it for free as part of the Oxford Advanced Learner’s Dictionary app

68(02) - The 3rd and 4th digits of the bearing number relate to the bore size of the bearing, numbers 00 to 03 have a designated bore size depending on the number.00 - 10mm01 - 12mm02 - 15mm03 - 17mm

Bearingnumber meaning pdf

There are three measurements that you need to know for any bearing: (i) Bore (inside diameter), (ii) Outer diameter and (iii) Width.  These are straightforward, and they then relate to the size name.  Let's use a 6802 as an example...

*Please note: Race bearings are FAST, but they have non-contact seals which are less resistant to water.  If you ride in all weather a lot of the time, we recommend Endurance bearings.

Bearingnumber List

Contact seals have a positive connection to the inner and outer races, where non-contact seals have a positive connection at one race and sort of “float” against the other. Contact seals have better weather resistance, while non-contact seals have lower friction, and thus lower resistance to the elements.

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*These bearings are designed to stand the test of time so you can ride as much as you want, with confidence your bearings will keep spinning smoothly - oh and they are still fast!

You can see the bearing size you need for your wheels in the table below. If you need any help selecting bearings just let us know.