NTN 6903 LLB 17x30x7 Ultra Low Friction Seal

(43 customer reviews)

£16.00 (£19.20 UK Customers)

NTN 6903 LLB 17x30x7 Ultra Low Friction Seal Genuine Bearing,

6 in stock

SKU: BRG-NTN-6903-LLB Categories: ,


This is a Genuine Bearing and not counterfeit or B grade Stock. Read more about this here

  • 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 largest exporters of bearings and friction reducing products in Japan, their bearings are found in many items such as Cars, Motorbikes and Jet engines. NTN are an OEM supplier to Shimano, Mavic, Time and Look in the bicycle industry. NTN supply Rolls-Royce, General Electric, Pratt and Witney with bearings for Jet Engines.

NTN bearings have highly engineered seals that have been incrementally improved over time. Their fully sealed and ultra low friction seals have the lowest friction values in their respective categories. These bearings are the preferred brand for Hambini Bottom Brackets.

These bearings are genuine NTN bearings supplied directly from NTN’s European Warehouse in France. They are not counterfeit or B grade stock.

Hambini is the largest supplier of NTN bicycle bearings in Europe


Q. What is the best bearing brand?

NTN, NSK, FAG and SKF are all quality bearing suppliers and their products meet ISO/JIS/DIN standards. When selecting a bearing it is important to ensure that the bearing fits correctly within the enclosure. Far eastern bearings sold on ebay or amazon are often out of specification in one or multiple parameters, these fit issues manifest themselves as creak or poor bearing life. Some sellers have been known to sell fake bearings which are very difficult to spot without specialized measuring equipment, fitting these usually presents the same problems. In short, fitting genuine branded bearings is recommended

Q. Which seals do you recommend?

For road racing, NTN LLB series, SKF RZ series and NSK VV series are recommended. For inclement weather or extended life, NTN LLU series, SKF 2RS series, NSK DD series or FAG 2RS series are recommended

Q. Which bearings have the lowest friction?

NTN LLB series followed by NSK VV series, SKF RZ series and then FAG BRS series

Q. How many bearings is this listing for?

All bearings on this website are sold in Singles unless otherwise stated

Additional information

Inside Diameter (d)


Outside Diameter (D)


Width (b)





Non Contact

Bearing Number


43 reviews for NTN 6903 LLB 17x30x7 Ultra Low Friction Seal

  1. Luke Philpott

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

  2. Michael Harrison

    Awesome bearings! Installed them on my Zipp 303s and they are silky smooth. I love your you tube videos. Keep doing them!!

  3. Alfonso M.

  4. Albert H.

  5. Lee Williams

    excellent bearings, fast delivery, good price.

  6. Tony Carmichael

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

  7. James Evans

  8. William Kin

    Outstanding support and wonderful products!

  9. Andrzej Pijanowski

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

  10. Anonymous

    Faster rolling than Ceramic speed

  11. Diego Marocchio

  12. Steven Bailey

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

  13. Anonymous

  14. Callum

    Fast efficient, excellent communication and a consistent source of quality products manufactured to exceptional tolerances. I really enjoy your videos and Appreciate excellence in a similar fashion. I was also taught to have a similar view of life until proven otherwise and both your services and opinion is both refreshing and much needed in a Society of mediocre And sub standard acceptance.

  15. Kevin Kawainui

    Perfect fit for Zipp 303s. Thank you

  16. Nick A.

    Bearings came really quickly – spot on service.

  17. Kevin Kawainui

    Bearings were as promised and installed perfectly.

  18. Anthony

    Excellent communication, product, and shipping. Buy with confidence.

  19. Dean k.

    Good product, but I think they where a too expensive and over priced shipping cost.

  20. Nathan Ansell

    Great communication throughout, and advised on various bearings to fit my zipp wheels. Ordered and arrived a couple of days later. Perfect service

  21. E J W

  22. Wilmar Gerstgrasser

    Good product as always and fast delivery. Thanks!

  23. Anonymous

  24. Andrew Dodds

    Blimey no swearing involved. Sold by a 5yr old. Fitted by a 3 yr old. Retro dude.

  25. Kanstantsin

    Hello Hambini fans.
    I received bearings in oem package and already installed them. Highly recommend.

  26. David Tam

    I came across Hambini’s YouTube channel and purchased these for my zipp 404 wheels.

    The bearings came in super quick to Canada.

    I haven’t had a chance to install them yet, but I’m sure they’ll be fantastic!

    Thanks, Hambini, for all the info and the excellent service/parts!

  27. Dafydd Davies

    Smooth + Good customer service

  28. David W.

  29. Ian Cuddy

  30. 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.

  31. Rick P.

  32. Suzanne N.

    Very fast shipping and great product. Thanks!

  33. Antony A.

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

  34. Pierre Z.

    Don’t bother to look for ceramic bearings. These bearings are way better. Fast shipping and very good experiance over all.

  35. Robert

  36. Vasilis Koukourakis

  37. Andrew H.

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

  38. William Anderson

    Excellent service even advised what bearings I required.

  39. Martin

    Expensive but good

  40. Darren C.

    Replaced my bearing in my winspace wheel with this NTN .so far so good 👍

  41. Harry Brawley

  42. Raul O.

  43. Vincent Giampa

    I purchased 6903 and 6803 for Zipp 202/188 v9 wheel hubs and free hub. All bearings installed easily and are silky smooth. I would highly recommend these bearings

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