Rotor U4630 To 386 Threaded Bottom Bracket (Ceramic Bearings)

In stock at our suppliers warehouse, estimated dispatch in 6 - 7 days

UK and EU delivery available.

Available for Reserve & Collect.

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The Rotor U4630 to 386 Threaded Bottom Bracket (Ceramic Bearings) is designed to improve bottom bracket longevity and to make installation easier. Increased BB stiffness and improved bearing alignment increase durability while threaded sleeves lock both cups in place, which helps to reduce bottom bracket creaking.

Rotor U4630 to 386 Threaded Bottom Bracket (Ceramic Bearings)

Introducing the new U4630 to 386 Threaded Bottom Bracket (Ceramic Bearings) from Rotor. The prime focus of this new bottom bracket is to alleviate many of the issues that affect other bottom bracket designs. The U4630 is designed to address challenges related to bottom bracket installation and durability.

Crafted from 7000 series premium aluminium, the UB4630 uses a threaded sleeve to lock both cups in place. This provides a uniform spin rather than relying on a press fit shell that can cause undesired noises. Ceramic bearings maximise rolling speed and minimise heat build-up, ensuring that nothing stops you from getting the power down.

The flush fitting in the press fit area also prevents bearing overload by improving alignment. This ultimately leads to a longer bearing life expectancy. The external bearing location affords a smoother spin and increased BB shell stiffness.

  • Compatible with 386 bottom brackets
  • Weight 109g
  • Constructed from 7000 series aluminium with ceramic cup bearings
  • Improves bearing alignment for longer bearing life
  • Increase BB shell stiffness
  • Internal sleeve prevents cable guide from rubbing against rotating parts
  • Threaded sleeves lock both cups in place

PRODUCT REF: ROC04029030101

UK Delivery Options

Free Delivery on all orders over £30

Estimated delivery within 4 working days (a delivery charge of £1.99 for orders under £30.00 will apply)

CollectPlus Delivery - £1.99

Have your order delivered to your local shop for just £1.99! For Highlands and Islands, please allow up to 5 working days. Orders can be shipped to UK CollectPlus locations specified on the website where they will be held awaiting collection for a period of 10 days.

Orders placed are normally dispatched within 2 working days.

Priority 1st Class Delivery - £2.99

Estimated delivery within 2 working days.

Next Working Day Delivery* - £4.99

A guaranteed tracked courier delivery, place your order before 3pm, deliveries are made Monday to Friday.

Saturday pre 12 Delivery - £4.99

Saturday delivery orders must be placed by 1pm Friday and are only available on items in stock in our warehouse. Orders are prioritised through our warehouse and are delivered on Saturday pre 12pm by courier. Package must be signed for upon delivery.

Sunday pre 12 Delivery - £4.99

Sunday delivery orders must be placed by 1pm Friday and are only available on items in stock in our warehouse. Orders are prioritised through our warehouse and are delivered on Sunday pre 12pm by courier. Package must be signed for upon delivery.

Reserve and Collect** - FREE

Reserve & Collect is available on all items marked 'Collection'. It is a FREE delivery option that allows you to collect your order from either our Sigma Sport Store, Hampton Wick or our Reserve & Collect location in Esher. Just select the Reserve & Collect button in the basket.

** Reserve and Collect Collections - Clothing, parts and accessories: Next day. Orders placed on Friday, Saturday or Sunday will be available for collection after midday on the Monday (excluding Bank Holidays). Bikes: 4 days if in stock at store, collect in up to 7 days (sometimes quicker) if in stock at warehouse.

* Next Working Day delivery is only available on items in stock in our warehouse and excludes pre- order items. Next Day refers to the next working day, Bank Holidays will add an extra working day to the estimated delivery lead times. UK next day excludes Saturday deliveries. This service is not available to some remote postcode areas. Please contact us for help.

London Same Day (Order Before 1pm)

We offer a Same Day delivery service into London. The cost is £25.00 under 2Kg and £35 over 2Kg. Place your order before 1pm, deliveries are made Monday to Friday. Please note this option excludes bicycles.

More information on our Same Day delivery options.

Bike Deliveries

All our bikes are fully checked and tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for despatch. All you have to do is add the pedals, rotate and tighten the handlebars. Typically we can deliver your bike in 4 - 5 working days.

Deliveries are made Monday to Friday on a pre-12pm delivery. One of our customer service team will be in contact to arrange a convenient day for delivery.

More information on all our UK delivery options.

International Delivery

We ship to over 100 countries using Tracked Post or DHL for fast and reliable deliveries. To see delivery options and delivery times, please add your items to the basket and proceed to the checkout.

International customers have 30 days from their order date to return your order. Goods must be returned in new condition with all original packaging intact, undamaged and tags attached. For full details, see this link.

Free UK Returns

We offer a free returns service for our UK customers. Sigma Sport will happily refund or exchange any item purchased at Sigma Sport, excluding Sigma Sport gift vouchers and personalised products except when faulty.

More information on the Sigma Sport returns procedure.

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