NTN 6803 LLB 17x26x5 Ultra Low Friction Seal

(61 customer reviews)

£16.00 Ex. VAT

NTN 6803 LLB 17x26x5 Ultra Low Friction Seal Genuine Bearing,

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SKU: BRG-NTN-6803-LLB Categories: ,


This is a Genuine NTN deep groove ball bearing

Technical Specifications

  • CN normal clearance
  • Teflon impregnated grease
  • Premium Tier 1 supplier
  • Most sizes are made in Japan, smaller sizes are made in Taiwan

NTN Corporation (Niwa, Tomoe, Nishizono) are one of the oldest bearing manufacturers in the world, with their roots dating back to central Japan in the early 20th century. They have been manufacturing for over 100 years.

Performance details

Bearing Vibration

Measuring vibration is an effective method of ascertaining how well a bearing is manufactured. High-frequency vibration levels, often called spike energy, detect minute microscopic flaws in rolling element bearings. The results below show a typical wheel bearing after 4000km of use. Lower values indicate a superior life and reduced losses from friction losses.

Genuine Bearings, Counterfeits and B Grade

This is a 100% Genuine NTN Bearing. It has been sourced directly from NTN Europe in Annecy, France. It is not B graded, counterfeit or an NTN labelled product from a third party. You can read more about this in the article Counterfeit NTN and SKF Bearings

There have been widespread reports of counterfeit and substandard (B Grade) bearings being sold to unsuspecting customers in the media. Using these items often results in diminished performance, reduced life and sometimes injury to personnel.

Genuine NTN vs Other NTN

The pictures below show two NTN Bearings, the bearing on the left is from Hambini via NTN in France, and the one on the right was purchased from a well-known UK bicycle bearing distributor; they claimed to have sourced their bearings from NTN. From the outside, they both look to be identical, and the packaging that they came in appeared to be identical. Further inspection of the bearings revealed largely similar seals that would be indiscernible to the average consumer. However, upon disassembly, several discrepancies were noted; the most obvious was the 40% higher ball count on the Hambini supplied bearing. Additionally, the Hambini supplied NTN bearing had a riveted metal cage, the distributor's bearing was folded sheet metal. Folded metal cages have considerably poorer load and stiffness ratings. The distributor bearing had failed after only 600km, a root cause investigation was conducted, and the bearings were found to be of dubious quality with an unverifiable supply chain.

Hambini Engineering and Technical Support

Hambini (the individual) is well known for his encyclopedic knowledge of Aerodynamics and tribology (Bearing Engineering) and is a recognized industry expert, he is a Chartered Aerospace Engineer, and his works are often referenced in technical publications and presentations. He has sat on numerous technical committees. On the internet, his training videos on YouTube have been seen over 1 million times. The technical reference documents and publications on the Hambini website alone receive well over 25,000 unique monthly visitors.

The average satisfaction rating from customers is over 97%, one of the highest in the industry. This satisfaction rating has been achieved by providing technically superior products, world-class design and manufacturing engineering, fastidious quality control and unrivalled technical support.

If you have a question, however big or small, you can email support@hambini.com or use the contact form.


Additional information

Inside Diameter (d)

Outside Diameter (D)

Width (b)



Bearing Number

61 reviews for NTN 6803 LLB 17x26x5 Ultra Low Friction Seal

  1. Luke Philpott

    Genuine bearings really quick delivery, I will be using you again.

  2. richard j.

  3. Albert H.

  4. Albert Huang

  5. Tony Carmichael

    Hambini was extremely helpful in making sure I got the right product for my bike.

  6. James Evans

  7. Michael

  8. Andrzej Pijanowski

    I didn’t replace the bearing yet but great service and fast shipping.

  9. thepartycanstart

    A Fantastic fast and smooth bearing. Hambini was a star in helping make sure I got the correct bearings for my zipp 404. Great comms and fast shipping. Spot on thank you ??

  10. Anonymous

  11. Ben N.

    Fantastic service and comms from Hambini. Helped me to get the correct bearings for my zipp 404 wheels. Bearings are noticeably faster. Thanks. Will buy from again

  12. Steven Bailey

    only just fitted to my lovely zipp wheels, they seem to spin very well and are nice and smooth

  13. J M.

  14. Craig A Cooper

  15. Anonymous

  16. Kevin Kawainui

    Perfect fit for Zipp 303s. Thank you

  17. Anthony

  18. Edwin C.

  19. E J W

  20. Tom C.

    It was not that the part was so special it was getting great advice on the right high-quality part to use that was so helpful. Very Knowledgeable

  21. Anonymous

    Good quality and promt service

  22. David Tam

  23. Klaus D.

    Fast shipping, product as advertised! Definitely recommended!

  24. Dafydd Davies

    Smooth + Good customer service

  25. David W.

  26. Ian Cuddy

  27. Timothy T.

    Great service, great bearings! Thanks!

  28. Lee

    Don’t listen to the professional haters or B$ of the over priced vapourware marketing gainz.

    Hambini provided me with a super fast response over email on how to get hubs reamed and improve bearing fit prior to making a purchase.

    The advise and new bearings have brought about not only a silky smooth ride, but also competitive times in TTs.

    And prices are superb! will be purchasing more Hambini supplied bearings in future.

  29. Rick P.

    Fast delivery for a 5 year old

  30. Antony A.

    Quality service, responded to questions super quick providing exactly what I needed. Delivery was quick and the bearings are amazing. Highly recommended ?

  31. Robert

  32. Charles Worl

    Fast shipping!

  33. Vasilis Koukourakis

  34. Andrew H.

    Excellent service. All questions answered promptly & professionally. Quick delivery & can’t recommend highly enough. Rated 11 out of 10

  35. Andrzej Pijanowski

    Everything is perfect. Fast shipping.

  36. Anonymous

    Good service and communication

  37. William Anderson

  38. Darren C.

  39. Anonymous

    Highly satisfied with the bearings. And the prompt delivery. Thank you.

  40. Paul Cartridge

    brilliant service. fast dispatch and quality products you can have faith in

  41. Vincent Giampa

    Used these on Zipp free hub and front wheel very smooth. These bearing install easily and most importantly very precise.

  42. Darragh H.

    Great service, top products

  43. Gunnlaugur

    Great quality bearings and superb support by our favorite 5 years old 😀

  44. Scott McClymont

    I have purchased quite a bit of gear from Hambini. All of it has been 100% perfect

  45. Neil T.

    Quality bearings from a trusted source, thank you

  46. Denys B.

  47. Anonymous

  48. Anonymous

  49. Luc Simard

    Excellent experience. Great product selection and fast international shipping.

  50. Holger Koser

    Much better than ceramic crap!

  51. Benjamin

  52. Andrew Leung

  53. Scott Johnston

  54. Carl

  55. Neil T.

    Quality product delivered quickly, highly recommended

  56. PAUL T.

    Fantastic service

  57. Scott

  58. Scott B.

    Top notch products and service. Super smooth bearings to replace the disappointingly short lived ones for my Zipp 404 rear wheel. (2 x 6803 & 2 x 6903). Ordered late evening and got them next day. Most excellent 😄

  59. Stephen W.

    I made an error (trying to order bearing sizes from memory in never a good idea). Messaged Hambini and the correct sizes were sent out and still arrived next day. The NTN bearings seem to be as smooth as I’d hoped.

  60. Thomas R.

    I got these for a dt swiss 240s front rim hub and they fit perfectly. The ultra low friction version are hard to find in the US and even with the shipping they are cheaper than other sources. Because they’re from Hambini you can be sure they’re not bogus

  61. Michael Conner

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Q & A

Hi is this quoted for 1 bearing or a set of 5? Thanks hambini Mark Ong asked on November 12, 2023

1 bearing

admin answered on November 12, 2023 store manager
(0) (0)

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