NTN 6806 LLB 30x42x7 Ultra Low Friction Seal BB30

(134 customer reviews)

£27.00 Ex. VAT

NTN 6806 LLB 30x42x7 Ultra Low Friction Seal Genuine Bearing,

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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

Outside Diameter (D)

Width (b)



Bearing Number

134 reviews for NTN 6806 LLB 30x42x7 Ultra Low Friction Seal BB30

  1. GrimboRacer

    Really good bearings. It’s pretty obvious when you get these compared to the cheap shit that your bike comes with.

  2. Clarksy

    I originally bought some of these bearings from an ebay seller. After some dialogue with Hambini he thought they were counterfeit and he was right. I have since purchased these ones and the difference is massive. I can’t thank Hambini enough for his service and support.

  3. Rich

    Wow… I’ve had many different types of BB30 and PF30 bearings over the years including €100 worth of C Bear ceramic – these NTN’s blow them all away. So smooth with almost no drag, seem very durable too unlike my experience with hybrid ceramic. I now replacing all my hub bearings With NTN..

  4. Masti_Jason

    Quality bearings, noticeable upgrade on the OEM crap that the bike came with. More expensive that chinese no names but NTN quality.

  5. caad10

    Replaced my ceramic speed bb30 bearings with these. A fraction of the price and they are just as fast. Fast delivery

  6. AL

    Customer service was on point, every one of my emails were answered quickly and thoroughly. I purchased NTN bearings and BB30 bottom bracket. Craftsmanship is top notch, you will not find a better product currently on the market for the price.

  7. barrydavies

    Upgraded from my OE bearings to these ones, no creak and super smooth. They are excellent. Difference between these and OE ones is like night and day.

  8. LRBBCrdier

    A big shout out to Hambini. I had a few creaking issues with my Boardman, I contacted Hambini. He gave me a few things to check and sent me some gauges. I also sent him my old bearings. Problem determined and diagnosed. I ordered these on his recommendation and have not looked back. Service was spot on. creaking and clicking a thing of the past. Like others have said, if you want the cheapest, go to wiggle but you won’t get access to this level of customer service. 5 stars all round

  9. Mario Cortez

    A lot of WW users swear by these. I can see why. Very smooth and easy to install. Reduction in friction vs stock is noticeable.

  10. RJ

    Replaced brgs as regular maintenance on my Cannondale BB30 bike. No ‘noises’ coming from the replaced brgs even after 20,000km. New NTN’s are ultra smooth. Thanks

  11. kirkstallryder

    These bearings are expensive compared to the ones on ebay but they really are super smooth. I was recommended these after querying a replacement for my FSA bearings. Arrived quickly and fitted without any hassles.

  12. zoubs

    love these bearings. smooth and solid. they really take a beating. highly recommend them. as for hambini, i’ve bought multiple sets for me and some friends, the shipping is fast to the US and have yet to have an issue

  13. madi34

    best price i could get on these, work well. miles better than the fsa shite i had in before

  14. BB30 Sucks

    Lots better than my original bearings and spin so much freely. Arrived next day.

  15. Alborz

    I have been through quiet a fair number of bearing (all FSA) on my self built chines framed bike, but these bearings feel the smoothest.

  16. AA

    Having followed Hambini’s rather cutting videos on bearings on youtube, I figured I should give these bearings a go. He shipped them almost immediately! I’ve just fitted them on my bicycle so we’ll see what they’re like but going on what others have said, I have high expectations

  17. macnracer

    Massive upgrade from my FSA originals. These are miles better

  18. the Manzi

    Installed these bearings in my CAAD10 with loctite 641 as the Hambini video instructed. First ride was perfect and smooth operation. When you see these bearings next to an FSA set you know that it was worth the extra money. These are engineered very well. Shipping to the US (Colorado) took 8 or 9 days. Will continue to buy these when needed and will go with a Hambini bottom bracket for my next build. Thanks! -Hambini Fan

  19. Metters

    I was pursuaded to buy these after watching some of Hambinis videos. I also had some Enduro bb30 bearings for a similar price which were horrible to press in, resulting in notchy bearings and poor life. These NTN bearings were night and day difference

  20. K-Lee Young

    Great bearings and fast delivery. Cheapest place I could find on the internet.

  21. T Lee

    Excellent price for high-quality Japanese bearings. Hambini was kind enough to recommend and change my original order. Super customer service. Thank you!

  22. Graham

    Outstanding quality bearing and fantastic service from Hambini. Very highly recommended.

  23. Martin Bradshaw

    Fitted and now cranks spin very smoothly. No grinding, fast service. Would recommend

  24. Justin

    Delivered and received quickly and questions regarding fitting answered rapidly with detail. 100% recommended

  25. Henry Atkins

    Replaced my stock bearings for these ones. The difference is instantly noticeable. A bit more expensive than FSA, wheels mfg etc. But I’d pay all day long to get rid of the creak.

  26. Ian

    Best quality bearings delivered overnight. It doesn’t get any better !!

  27. Bart

    Everything came as expected.

  28. MikeyJames

    Creaking stopped and cranks are now super smooth. Worth it for the upgrade.

  29. Misey3yd

    Swapped out the stock BB bearings after 800km. They were garbage. NTN ones installed with ease, no creaking and spins super smoothly. I was an SKF man for many years. I will buy these ones from now onwards.

  30. Cannondale Steve

    Great upgrade over the stock FSA shite. Difference immediately noticeable. All creaking has gone too.

  31. Timmy

    Very good product, Quick delivery and great service of Hamibini

  32. Charlie Thomas

    Fit these to your BB and you won’t regret it. They are a bit on the expensive side but they last a long time and are very smooth in operation.

  33. Spin to win

    Super quick delivery, haven’t fitted them yet but they look like the shiz. Thanks Hambini aged 5 🙂

  34. Chris

    Quick delivery, great service!

  35. ExFlyboy

    See summary

  36. JBCTR658

    I have tried lots of different ceramic bearings (Kogel, Ceramicspeed, Enduro). These are much better when on load and they last a long time, these replaced a set that did 9000km on my c’dale.

  37. John in NYC

    I don’t have creaking issues, thank God, but the stock FSA bearings that came with my Roubaix SL4 were showing signs of being worn out after 3,500 miles. I decided to spring for these after getting schooled by Hambini on YouTube. They arrived in 8 days to NYC. Thank you Hambini for promptly responding to my query. I wanted to install these myself but couldn’t quite justify buying the tools so I had my LBS do it under my supervision and they did a great job for a reasonable price. I also had them install Smalley circlips to replace the stock (seal impinging) eyeleted rings. The difference was noticeable and significant. The drive train felt glassy smooth under load and I set two PRS in a dead calm without even pushing my HR into the red on my daily 20 mile Central Park ride. This upgrade is just an incredible bang for the buck. I am shocked at how many watts were being stolen by my shit stock bearings. Thank you Hambini!

  38. Ulf Hansen

  39. Noah

    mate these bearings are so good! rapid delivery as well.

  40. Andrew

    simple, easy and speedy

  41. Michel

    These replaced the native bearings delivered with my BB. Very smooth! Super satisfied.

  42. Darius Jonasch

  43. Jan

    Top Quality – Fast Delivery – Especially from a 5 y/o ?

  44. Adrian Lee

    Excellent service given the problems there must be in getting hold of supplies of these top quality bearings at the moment

  45. Malcolm Robertson

  46. Carlo

    Fast delivery and great comms.

  47. james d.

    Bought some NTN bearings. Came quick and the service was great.

  48. Immanuel S.

    Excellent delivery time despite there being a notice on the website about delays due to COVID. The bearings themselves run very smoothly compared to the stock ones (although that’s to be expected from brand new bearings and I haven’t put huge mileage on them yet) but I have good faith

  49. Andrzej Pijanowski

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

  50. Emiel Beukenkamp

  51. Martyn

    Great customer service. I received a number of emails with really helpful installation advice. Highly recommended

  52. Dirk Beauboir

  53. Olivier V.

    Excellent bearings, smooth despite no break-in.

  54. michael Innusa

    thank you great info keep up the good work cheers

  55. Justin B.

  56. Anonymous

  57. steve young

    Always a pleasure doing business with you, product’s turned up promptly and my bottom bracket as never spun so smoothly, and the removal tool worked a treat

  58. Leif-Petter

  59. Rodney

    They got lost via USPS. Finally got them last week. Other 2 buys were on time.

  60. Olivier L.

    Really good

  61. Lester D.

    Awesome egnieering-based advice, and awesome quality bearings!

  62. tan kitaro

    good after sales support too as l asked if there is a need for me to use the Loctite activator for my PF30 nylon cup inserts. Reply was swift and precise. Thanks!

  63. Gareth Collier

    Great service

  64. Mark McGrath

  65. Peter

  66. Marc B.

  67. jean-marc BEGAGNON

    Ces roulements sont très fluides comme annoncé mais il me semble que je les aient payés au prix fort. De plus sur le site le prix de mon panier avait été converti en € mais ce n’a pas été le cas… J’ai donc payé cher avec de plus des frais conversion de monnaie….
    Je pourrais renouveler mon achat si je reçois un coupon de réduction.

  68. Barry J.

    Grate bearings stoped my Cannondale creaking

  69. Ian

    Very useful information about Ceramic bearing BBs lead me to order the NTN bearings for a fraction of the price of some early deceased Ceramic Speed bearings. So far so good but early days with only 300 miles on the new ones

  70. Jason H.

    Best price anywhere and took about a week to arrive in the US.

  71. arindam fadikar

    Fast shipping. NTN bearings are smooth — happy with them!

  72. derek c.

    smooth like butter

  73. Rasmus J.

    Great product, have been following Hambini for a while and feel confident these are genuine and the best

  74. Steven

    All good thanks

  75. Leon Schulz

  76. Christopher Zdunek

    Top notch service and knowledge. The guy is brilliant!

  77. David Clifton

    Had to replace a bearing in a just installed hambini bb. Not their fault but surprised me.

  78. Mik Jørgensen

    Bearings are great- shipping to EU not so much…

  79. Basil H.

    I always go to Hambini for anything bottom bracket related because they are the best, fair price and fast shipping.

  80. Richard P.

    Easy to find product required, quick to order and receive, no hesitations in recommending service

  81. Geoffrey Nakar

  82. Michael A.

    Bought the NTN’s for my Super Six all the way from California. I think I received them in a week from the EU!
    Smooth bearings for sure. Love your Utube channel as well. Heard you might be in a bit of hot water, but then so was Galileo. I do believe we are at the center of the Universe, don’t you agree? Happy bikin, =

  83. Anonymous

  84. Jon

    They arrived quickly and are lovely!

  85. Carsten Machholdt

  86. Francisco Camarillo

    The Lick!!

  87. Nosmo King

    Delivery was just over a week to the US, not bad at all considering the final leg was USPS.

    Replaced the Enduro ceramics in a Specialized OSBB that had gone a bit crunchy. The NTN’s are next level in their look and feel. I know the spin test is a bit of a gimmick, but 31 turns! What??

    Just a note for US buyers: the shipping is slightly more but since the 20% VAT does not apply you end up paying less than your UK cousins.

  88. Khalid AL muhairi

    Best quality

  89. Simon Thacker

  90. Khalid AL muhairi

    Best quality

  91. Fraser

    Quality bearings. Way better than originals that came with bike. Delivery was super quick as well.

  92. Simon M.

    Great personal service!

  93. Stephen

    Hambini’s cock (engineering term) is not concentric but his bottom brackets are. These are great quality bearings which replaced some creaky junk.

  94. Allen

    I bought some top quality bearings – with complete confidence in Hambinbi. It may have been a couple of bearings to them but it, and the associated PF30 alternative was a major upgrade for me. It worked perfectly! I like the stock levels shown on the site, as a retail customer I’d prefer the inc VAT price to be shown and I like the secure delivery. Good helpful website and I had a question – answered straight away.

  95. Lance

    HAMBINI knows bearings.

  96. James

    Great service. Quick delivery. Helpful response to issues regarding bearing size.

  97. James V.

    Hambini helped me sort out my BB bearings. Couldn’t have done it without him. They are running super-smoothly now. Thanks Hambini!

  98. James Taylor


  99. David L.

    Wow! What a difference compared to my stock bearings. Now my bike is running smoothly. Thanks Hambini.

  100. Anonymous

    Perfect bearing for my bottom bracket.

  101. Conor

  102. Michael Oliver

    As described, quick shipment

  103. Arthur S.

  104. Tim D.

    Just a gentle flip of the finger sets the cranks in rapid motion. I love this Hambini Bottom Bracket with NTN bearings. I may not be any faster but the bike is buttery smooth and seems to glide. It makes the whole ride experience way more enjoyable. https://youtube.com/shorts/Y7l71SrC46A?feature=share

    2015 Cannondale SuperSix Evo Hi-Mod. PF 30

  105. Edward

    My bottom bracket is still making noise, so might need more than new bearings…

  106. Anonymous

    What I requested, delivery was uncomplicated and fast

  107. Lee

    Delivery was very fast. Excellent Bearing.

  108. Vasos

    Perfect for my hambini bb

  109. Peter Walker

    Super easy to order and fast shipping at a reasonable price… What’s not to like.🤷‍♂️

  110. Jason H.


  111. Nick Mannerings

    Superb bearings. I put them in a Hambini BB. They spin so smoothly. The best set up you can get.

  112. Anonymous

  113. Patricio

    Perfect as always

  114. John Lambert

    Just great!

  115. John Kyle

    Always a pleasure dealing with Hambini!

  116. Callum C.

  117. John

    Service of the kind one hopes to find but rarely does!

  118. Richard P.

    Great product at a good price.

  119. Danyal A.

    Very good quality, runs smoothly af

  120. Jordi

    Really perfect, you did the extra mile to speed up delivery and save my race on the upcoming weekend.

  121. Francis S.

    Nice bearings, but don’t last that long (unless cleaned and regreased). Price of going “fast”.

  122. Matthew Hughes

    Excellent service as ever

  123. Eric B.

    NTN bearings from Hambini. The real thing, as guaranteed.

  124. dave

  125. Marco

  126. Anonymous

  127. Colin

    Excellent product. Excellent service.

  128. Scott

  129. James Taylor

    Excellent service and quick delivery

  130. WAYNE

  131. Colin P.

    Excellent as always

  132. David

    Smooth, silent and efficient. The bearings are cool too.

  133. Tom K.

  134. Dave Sarcevic

    Responded to request immediately and received my item in a timely manner.

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Q & A

Is quantity 1 = 1 bearing or a set of 2 bearings? Curt asked on September 18, 2022

They are sold as singles as stated in the description.

Hambini Engineering answered on September 18, 2022 store manager
(1) (0)
Do this bearing can fit into my trek emonda T47-1B ? Librahim Rahardjo G (Andy) asked on September 10, 2021
(2) (0)
Do these bearings get additional outer seals once fitted and if yes which are recommended? I recently took my crankset out because the bearings are pitted and one bearing was ripped into two pieces (outer and inner race, balls everywhere, shite FSA bearing). That was the first time I took it apart myself and noticed that the BB consists of 1 wave washer and 2 outer bearing seals and the 2 bearings. Am I supposed to reuse the seals and wave washer? One seal got destroyed as well, so what should i go for now? (I suspect not FSA?) (my bike: Cannondale SuperSix 2010 BB30 with FSA SL-K light crankset) Also does someone know how the side to side play on this crank can be adjusted? I had the feeling that the crank was putting to much force on the sides of the bearing but as there is only the wave washer in there I don't know how i could adjust that play (or lack of it) Would appreciate if someone could help me out! Cheers! J. Jan S. asked on May 2, 2021

These bearings come with integrated seals, I think the seals you are referring to actually double up as spacers. You are supposed to reuse the wave washer and the outer seals (spacers). The side to side play is adjusted by way of shimming. Getting the preload correct can be problematic with wave washer systems.

admin answered on May 2, 2021 store manager

The wave washer is there to take out the movement/play tot the sides of the crank. You must reuse the wave washer.
The 2 outer bearing seals are extra seals to prevent debris from reaching the bearings and their seals. They also diminisch or prevent water ingress into the bearings from rain or washing (especiallypressure washing your bike. The 2 outer seals do not prevent water ingres but diminish it..

TP answered on January 19, 2022
(0) (0)

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