NTN 6805 LLB 25x37x7 Ultra Low Friction Seal

(44 customer reviews)

£39.00 Ex. VAT

NTN 6805 LLB 25x37x7 Ultra Low Friction Seal Genuine Bearing,

72 in stock

SKU: BRG-NTN-6805-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

44 reviews for NTN 6805 LLB 25x37x7 Ultra Low Friction Seal

  1. richard j.

  2. Seb

    Excellent NTN bearings. Very easy to install (with Hambini YouTube guide) and fast delivery. Thank you.

  3. Ronnie

  4. Lydia Teal

    Excellent product, excellent customer service and quick delivery.

  5. iain macdonald

    as above

  6. Anonymous

    Just spares for the long run – the ones already installed in the BB beat the Shimano Dura Ace BB86 composit shells by lengths

  7. Klaus

    As advertised! AAA+, highly recommended! Fast shipping, good online shop, perfect customer support!

  8. David Petchkis

  9. Chris L.

  10. Kevin Kawainui

    Bearings were genuine NTNs and arrived quickly. Thanks Hambini

  11. Taco

    Just great.

  12. César Saura

  13. Leon Schulz

  14. Clément R.

  15. Gggc

    I tried a few other online UK sellers before I got these ones. I would come here again, they are expensive but you are buying real bearings and not the defective ones

  16. Gerard

  17. Chris

    I wish I had bought from here originally. Hambini is a bit more expensive but you are getting genuine bearings. Some of the other online retailers are blatantly selling fakes and ntn don’t seem to care about it.

    Service and technical support are as to be expected, the lick

  18. Klaus

    Fast shipping. There has been a mix up in the bearing type but Hambini immediately offered a discount! Top notch!

  19. Matthew King

  20. Lydia T.

    High quality of product and fast shipping. A++

  21. Jonathan Freedman

    Shocked on how fast the order arrived in the US. Great job!

  22. Khalid AL muhairi

    Best quality

  23. Daryl P.

    Pricey but I know it’s the legit product and not counterfeit. The assurance is worth the price. The customer service is consistently high. These bearings are my forth or fifth purchase from Hambini and I always know when a parcel is arriving.

  24. Patrick Ludovici

  25. Anonymous

  26. Andrew Fang

    Funny how I consider Hambini as a genuine bearing supplier after seeing/hearing about the rampant fakes.

  27. Neil

  28. Kevin

    Appeared noisier and less smooth than the originals that came with the ‘race’ spec BB, but spin just fine.

  29. Juan E Martinez

  30. Vasilis Koukourakis

  31. LLOYD

    Love this as well. Only place I know will have genuine ntn bearings.

  32. Conor

  33. Michael

    Great service, excellent product, couldn’t ask for more!

  34. steve howlett

    The best of the best..wouldn’t buy from anyone else 🙂

  35. Grady L.

    Excellent as always from Hambini, fast delivery.

  36. Martin K.

    Exceptional quality and support, thank you.

  37. Seiji Nakatani

  38. kim butler

    Bearing sent out quickly Quality is very smooth. Only thing that could be better would be to return reply to email to Hambini about my experiences comparing his bottom brackets to other similar priced ones

  39. butlerak

    Follow up review. I am quite impressed that Hambini got back to me immediately about my review. He answered my questions that got lost in emails. Super customer service for sure. Thanks again.

  40. Anonymous

  41. Jan Machacek

    The bearings are great–fit and installation without problems.

  42. Anonymous


  43. Michael

    Top shelf personal service by Hambini during e-mail communication. Highly recommended. Been getting 10,000km + with these bearings and a Hambini racing BB (purchased 3 years ago). Usually, what ends up killing the bearings is water infiltration long term (usually from spraying too much water in the BB area while washing the bike or with a light pressure washer).

  44. Kevin Schofield

    I thought these were a tad on the expensive side so I bought some from elsewhere. They didn’t last too long.

    I subsequently bought these and the difference is day and night. They are expensive, but they are either of superior NTN quality, or there are a large amount of fakes out there. Buyer be warned.

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Q & A

Is the price for two bearings? Boris asked on May 13, 2024

they are sold in singles.

admin answered on May 14, 2024 store manager
(0) (0)
Hi, I have a Pinarello F8 Road Bike with Ceramic Speed BB with Ceramic Bearings 61805 RS Bearing. I was thinking in getting your product: 81NTN 6805 LLB 25x37x7 Ultra Low Friction Seal but which one do you recommend the LLB or LLU and do you know if this will work best on my road bike. Thanks in advance. I would like to buy four to have a set as a spare. Alvaro Eraso asked on June 26, 2023

LLU is a double lip seal, ideal for inclement weather. If you are going racing then LLB is better as there is no contact and hence less drag. 6805 and 61805 are the same size, it's a different bearing standard for sizing. So they will fit.

admin answered on June 26, 2023 store manager
(0) (0)

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