Lugged BB shell for oversized 1" or 1-1/8" frame

Lugged BB shell for oversize 1" or 1-1/8" frame - 30x17 oval chainstays


Regular price $ 31.95 Save $ -31.95

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sku # J146B

Lugged BB shell for 1" or 1-1/8" Oversize frames - 28.6 seat tube, 31.8 downtube and 30x17 oval chainstays. Steel.

68mm wide. ISO - right and left-hand threaded, 1.370" x 24tpi.

Downtube/Seat tube angle = 60.5°
Seat tube/chainstays angle = 62°
Angle between chainstays = 14° (7° on center)

179g. - Weight is based on a representative sample. Actual weight may vary slightly. Imported.

We carry lugs that fall into three of the four most commonly built types. These are all road oriented lugs, but hey, there aren't any lug police out there, so do what you want. Two of these types work with 1" steerer tubes and two work with 1-1/8" steerers. The terms: standard, oversize (OS), and double oversize refer to the tubing diameter that the lugs will accept. The larger the diameter the tube, the stiffer the tube, and the stiffer the tube, the stiffer the frame. In general if you're building for a cyclist of average build, you can safely go with 1" standard or OS. If the rider is taller and/or heavier, you might want to go with the 1" oversize, or 1-1/8" oversize. If the bike will be used for touring, oversize tubes might be a wise choice. 1-1/8" double oversize lugs go with even bigger tubes. We don't currently carry double oversize lugs.

In these illustrations the main triangle tubes are light blue and the lugs are darker blue. Each lug joins at least 2 tubes, with the BB shell accommodating 4 tubes: a downtube, seat tube, and 2 chainstays. The chainstay size further complicates matters with the BB shell accepting 22.2mm round chainstays or a variety of oval chainstays. Obviously you'll want to make sure that your chainstay diameter and shape matches with the chainstay socket portion of your BB shell.


Hello UK customers! We are very sorry, but the new rules for shipping to the UK, as well as taxes/fees, have made it prohibitive for us to continue to ship there. We are very sorry for this, but perhaps things will change in the future that will make shipping to the UK a viable option.

Shipping for spray paint is only available in the contiguous US and must ship by ground. If it is purchased along with other items, the entire order will ship via ground. If you want your other items faster, please select a separate shipping option.

We ship via Priority USPS with tracking, UPS, and FedEx. For orders with a shipping weight of less than a pound, we offer USPS 1st Class Package shipping with tracking.

We send out USPS packages M-F, except for federal holidays when USPS doesn't ship. If we receive your order before noon (Pacific time) M-F (Thursdays ship at 9am), it will likely go out that day.

UPS and FedEx packages are sent out on Wednesday and Friday.

If an item is damaged or has been sent in error, we will pay for return shipping and replace the item if it is returned within 30 days purchase.

If you ordered the wrong item or changed your mind, you may return the item provided that it is in new condition and within 30 days of purchase. You will be refunded the purchase price minus a 10% restocking fee. The restocking fee does not apply to exchanges.