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  • Bike Headset Bearings- All Sizes - Blueseal Bike Bearings™ - Trailvision - Bicycle Bearing Suppliers
  • Bike Headset Bearings- All Sizes - Blueseal Bike Bearings™ - Trailvision - Bicycle Bearing Suppliers
  • Bike Headset Bearings- All Sizes - Blueseal Bike Bearings™ - Trailvision - Bicycle Bearing Suppliers
  • Bike Headset Bearings - Blueseal Bike Bearings™ - Trailvision - Mountain & Road Bike Specialists

Bike Headset Bearings- All Sizes - Blueseal Bike Bearings™

Blueseal Bike Bearings™ are designed specifically for use in bicycles with extra grease, superior seals and extended life.

++ Upgrade your material for enhanced corrosion resistance.

Learn About Blueseal Bike Bearings™
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Estimated Delivery*: Tuesday 16th September
Delivery times are estimates and achieved 99% of the time; however, they cannot be guaranteed.
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Product details

Blueseal Bike bearings™ are bicycle-specific bearings designed to withstand the unique challenges faced by a bicycle bearing. ABEC 3 rating, a complete fill of waterproof grease and close-contact rubber seals make Blueseal Bike Bearings™ the obvious choice for bicycles. 

If you know the dimensions or the code and are unsure which your bearing is, chat with us and we will do our best to help.


45 degree or 36 degree inner race headset bearing identification

 

Headset bearings are notoriously hard to identify and the same bearing can use different codes to identify them. If your code isn't listed here or you are not sure what headset bearing you need please chat with us and we will help you find the bearing you need.

The chances are we have the bearing you need!


Example No) Bearing Code |  Dimensions  |  Inner/Outer Chamfer Angle  | Alternative Codes & Common Uses


1) MR042 |  30.5 x 41.8 x 8H  |  45/45  |  TH870 MR121 MH-P08H8

2) MR121 |  30.5 x 41.8 x 8H  |  45/45  |  With lip on Inner Race  TH870E MHP08F

3) MR122 |  30.15 x 41 x 6.5H  |  36/45  |  TH873E TH873R MR054 MR115 MH-P03K

4) MR170 |  40 x 52 x 7H  |  45/45  |  TH070 MP-P16 TH070E TH070R

5) MR127 | 40 x 51.8 x 8H | 36/45 | TH073 MR110 TH073R TH073E TH073S

6) MR151 |  37 x 48.9 x 7H  |  45/45  |  NO8c-138 MHP21

7) MH-P16H8 |  40 x 52 x 8H  |  45/45  |  ACB52

8) MR168 |  34 x 46.8 x 7H  |  45/45  |  TH970 MR082 MHP22 TH970E TH970DJ TH970S TH970R

9) MH-P03 |  30.15 x 41 x 6.5H  |  45/45  |  

10) MR075 |  30.2 x 41 x 7.8H  |  36/45  |  TH800

11) P08H7 |  30.15 x 41.8 x 7H  |  45/45  |

12) MR136 |  32.8 x 41.8 x 6H  |  45/45  |  No.51

13) MR137 |  37 x 46.9 x 7H  |  45/45  |  No.54

14) MH P25K |  40 x 52 x 6.5 H  |  36/45  |  Cane Creek 52mm Lower Bearing

15) MR043 |  30.2 x 41.5 x 6.5H  |  36/36  |  TH872E MR049s MR118

16) MR040 |  30.2 x 41 x 7.7H  |  36/45  |  TH873/DJ .

17) AC3344H6 |  33 x 44 x 6  |  36/45  |  Lower bearings on some Canyon Frames

18) AC3544 |  35 x 44 x 5.5  |  36/45  |  Upper bearing used on some Canyon Frame

19) ACB460H7 |  34.1 x 46 x 7  |  45/45  |  Lower bearing Scot Foil

20) MH-P22 |  34.1 x 46.9 x 7H  |  45/45  |  Lower bearing Focus

21) 6707 LLB |  35 x 44 x 5mm  |  90/90  |  Acros A170 Upper

22) MR314357 |  31 x 43.5 x 7mm  |  90/90  |

23) ACB458 |  36.8 x 45.8 x 6.5H  |  45/45  |  Future Shock Headsets

24) P03H7 | 30.15 x 41 x 7  |  45/45  |  Scott Foil Upper bearing TK410

25) ACB519H8 |  40 x 51.9 x 8  |  45/45  |  Ritchey Lower

26) ACB515H7 |  40 x 51.5 x 7  |  45/45  |  Ribble Headset Lower

27) MH-P08 |  30.15 x 41.8 x 6.5  |  45/45  |

28) MR155 |  30.15 x 41.8 x 7.7  |  45/45  |  TH870/DJ  P08H7.7

29) MR031 |  37 x 48.9 x 6.5  |  36/45  |  IS-2-138 

30) ACB3748H7 |  37 x 48 x 7  |  36/45  | Acros A170 Lower

31) P08H7K |  30.15 x 41.8 x 7  |  36/45  | Acros A170 Upper used in YT

32) P16K |  40 x 52 x 7  |  36/45 



View full details

Bike Headset Bearings- All Sizes - Blueseal Bike Bearings™

Material Upgrades

Stainless Steel

  • High Chromium Content (16-18%): The chromium forms a protective layer, making the material highly resistant to rust, corrosion, and oxidation.

  • Corrosion Resistance in Wet Conditions: 440C stainless steel performs particularly well in poor, wet, or marine conditions, where moisture can cause rust in less resistant materials.

  • High Hardness: After heat treatment, 440C can reach a high level of hardness (Rockwell hardness in the upper 50s to low 60s), making it suitable for applications requiring wear resistance.

  • Reduced Service Time Less likely to fuse to the frame and headset housing allowing for easy replacement when the time comes.

Black Oxide Coating

  • Enhanced Corrosion Resistance: Black oxide provides a protective layer that helps prevent rust and oxidation, which can extend the life of the part, especially in humid or corrosive environments.

  • Reduced Wear: The coating reduces friction between metal surfaces, which minimizes wear and tear. This is particularly important for bearings, as they are subjected to constant motion and load.

  • Improved Durability: By forming a stable layer on the surface of the metal, black oxide increases the part's resistance to fatigue and mechanical damage.

  • Reduced Service Time Less likely to fuse to the frame and headset housing allowing for easy replacement when the time comes.

See Other Blueseal Bike Bearings


Learn About Blueseal Bike Bearings™

Stumpjumper Headset Bearings - Specialized - Trailvision - Bicycle Bearing Suppliers

ABEC 3 as Standard

Most non-bike specific bearings are ABEC 1 as standard. Blueseal Bike Bearings™ are all ABEC 3 Rated, this higher class of bearing runs smoother & last longer. 

Max. Fill Premium Grease

Standard bearings contain a small amount of basic bearing grease (Approx. 20%) which offers little protection towards corrosion and rain and dirt ingress.

Blueseal Bike Bearings™ contain the maximum fill of Mobil waterproof grease possible without compromising the function of the close-contact rubber seals.

Designed For Bicycles

Specially engineered bicycle bearings. Designed for maximum efficiency, they outperform standard bearings.

Close Contact 2RS LLB Seals

Blueseal Bike Bearings™ have top-quality LLB 2RS close-contact rubber seals. The tighter the seal is to the inner bearing race the harder for water and dirt to get in and the grease to get out!

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  • Trusted for 15+ Years with 100,000+ Bearings Sold

Trailvision is an independent family business with over 15 years of hands-on experience in the bike-bearing industry. Using our expertise we develop and stock only the best products specifically suited for bicycles.

What Our Customers Say

4.92 ★ (442)
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Customer Reviews

Based on 20 reviews
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T
Trevor Harvey
Bearing up

Found the site when looking for some pivot bearings
All bearings needed were in stock and delivered quickly. Excellent service
I have ordered more bearings since and will continue in the future
Many thanks
“When you’re over the top, it’s all downhill”

B
Bob
Headset bearings

Good product

n
nigel eckley
Great service

There was a problem with delivery that was not their fault, I contacted them & the issue was resolved immediately with out any fuss.

c
chris

Spot on. Bearings to fit anything

B
Bryan Harding
Great Bearings, Price and Service

Ordered a set of headset bearings for my Neil Pryde Tri bike. I’ve used Blue Seal Bearings before and knew they were quality bearings. Price was reasonable (you get what you pay for) and service was exceptional. I’ll definitely be using Trailvision for my future bearing purchases.

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