Unfortunately, it’s difficult to know upfront which length will be the optimal choice. For all I could try, it still boils down to trial and error. I make sure to always have the entire range of lengths in the shop and am happy to do test-mounting to confirm, starting with the length I expect to be the optimal choice first. Sivamaruthi BS, Kesika P, Chaiyasut C (2020) The role of probiotics in colorectal cancer management. Evid Based Complement Alternat Med 2020:3535982. https://doi.org/10.1155/2020/3535982 How companies decide to go about that — and precisely what design features they want — is the real issue, because everyone seems to have their own ideas on how to achieve the same goals (less weight, more stiffness, and lower manufacturing costs). The design comes about as a solution to the well documented creaking issues associated with oversized press-fit systems. While these issues are near always the result of poor tolerances, the T47 standard promises to fix the creaking issue without sacrificing the benefits of an oversized interface.

Crank compatibility is another BB386 EVO strongpoint. Despite the bulbous dimensions, the shell will accept most modern crankset fitments save for dedicated BB30/PF30 and BBRight designs. The road standard has an 86.5mm shell width (hence BB86) whilst the mountain bike standard has a 91.5mm shell width. A number of other shell widths may also exist, though they all use the same bearing cups. More recently, bearings have shown up that allow a 30mm spindle to be used. The dimensional restriction mean the bearings are generally quite small, as the system was designed around 24mm spindles. This can lead to reduced bearing lifetimes.Li Q, Li Y, Wang Y et al (2021) Oral administration of Bifidobacterium breve promotes antitumor efficacy via dendritic cells-derived interleukin 12. Oncoimmunology 10(1):1868122. https://doi.org/10.1080/2162402X.2020.1868122 Lee N-K, Han KJ, Son S-H, Eom SJ, Lee S-K, Paik H-D (2015) Multifunctional effect of probiotic Lactococcus lactis KC24 isolated from kimchi. LWT Food Sci Technol 64(2):1036–1041. https://doi.org/10.1016/j.lwt.2015.07.019 Other notes OSBB for Specialized Road bikes appears to just be BB30. An older Pressfit 61x46mm BB appears to be obsolete OSBB (Mountain) To keep matters simple, we’ve put together a simple explainer on this slightly esoteric of standards here.

Cervélo introduced the new BBright system on the R5ca, and while it offers some sound engineering advantages, other companies have been slow to adopt it Immediate Media PF86’s wider shell allows the chainstays to be pushed further apart – a big advantage for ‘cross bikes Immediate Media Trek introduced the proprietary BB90 standard in 2007 on the revamped Madone and soon followed with the mountain bike-specific BB95. Compatibility Originally designed for BB86 cranksets and bearings. New integrated CeramicSpeed BB fits 30mm spindle cranks

Halfords Bikehut 30pc Bike Tool Kit performance

Pros: Vast crankset compatibility, open standard, threaded design easy to service and prevent from creaking, same dimensions as PF30 The need for a heavier metal interface looked like a limiting factor for mass-produced carbon bikes, but with a manufacturer like Trek on now on board (as mentioned above, its 2020 Domane features a T47 BB) that could all be about to change. http://www.chainreactioncycles.com/us/en/shimano-ultegra-6800-11-speed-groupset-builder/rp-prod136551

Colegio OR, Chu NQ, Szabo AL et al (2014) Functional polarization of tumour-associated macrophages by tumour-derived lactic acid. Nature 513(7519):559–563. https://doi.org/10.1038/nature13490 BB30 and PF30 cranksets won’t fit frames with different BB shell standard, because their spindle will be too short.Touchefeu Y, Montassier E, Nieman K et al (2014) Systematic review: the role of the gut microbiota in chemotherapy- or radiation-induced gastrointestinal mucositis - current evidence and potential clinical applications. Aliment Pharmacol Ther 40(5):409–421. https://doi.org/10.1111/apt.12878 B.S.A. (Birmingham Small Arms) was a major British manufacturer of firearms, and later of bicycles and motorcycles. It reached its peak in the 1920's. The standard thread sizes that B. S. A developed for its bicycles were ultimately adopted as the standard British (B.S.C.) sizes, which, in turn, were mostly adopted by the I.S.O. In general weight savings are the primary driver of the higher BBs. It would not be reasonable to assume that they are more durable. Other names PF41 (Hope – refers to BB shell diameter), PF24 (Chris King – refers to spindle diameter)

Ren Z, Chen S, Lv H et al (2022) Effect of Bifidobacterium animalis subsp. lactis SF on enhancing the tumor suppression of irinotecan by regulating the intestinal flora. Pharmacol Res 184:106406. https://doi.org/10.1016/j.phrs.2022.106406 With the PressFit 30, they’re using the same technology with the larger bearings and the same technology with the bearings living inside the frame, but they’re utilizing the nylon to their advantage where you have a more realistic tolerance.” Krysko DV, Garg AD, Kaczmarek A, Krysko O, Agostinis P, Vandenabeele P (2012) Immunogenic cell death and DAMPs in cancer therapy. Nat Rev Cancer 12(12):860–875. https://doi.org/10.1038/nrc3380

BBT-59.2 Features

In terms of both BBs and cranksets, of course. There are so many (in)compatible standards and how not to get confused or get mismatching equipment? Just follow these simple steps: