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Shimano SM-BBR60 (BSA) Ultegra Bottom Bracket

£13.79£27.58Clearance
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From the outset, Cervélo introduced BBRight as an open standard that anyone could jump onto. While it seems to make good engineering sense, however, other bike companies have been slow to come on board. Pros: Stiffer than BB/PF30, in theory, without impacting other attributes; good crank compatibility, cheaper to manufacture than threaded or BB30 Crank designs that will fit: Standard 24mm external-type only. A GXP conversion kit is also available 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 Boris S, Suarez JE, Barbes C (1997) Characterization of the aggregation promoting factor from Lactobacillus gasseri, a vaginal isolate. J Appl Microbiol 83(4):413–420. https://doi.org/10.1046/j.1365-2672.1997.00250.x

PF30, OSBB, BB386EVO if it matches the spindle length, BB30A if the crankset has spacers on the left side Specialized uses PF30 for its high-end mountain bike, confusingly also calling it OSBB though it is a different standard to the OSBB standard found on its road bike. Iida N, Dzutsev A, Stewart CA et al (2013) Commensal bacteria control cancer response to therapy by modulating the tumor microenvironment. 342(6161):967–970. https://doi.org/10.1126/science.1240527 Pros: Claims of improved sealing and durability, compatible with major BB standards, cross-compatibility for DUB cranksetsColegio 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 Cranksets with 24 mm spindle diameter are not all the same! SRAM and some other manufacturers make spindles that are 24 mm wide at one end, and 22 mm wide on the other, so the correct matching BB needs to be acquired. Pros: Lighter weight; more resistant to axle twist; more heel clearance; larger-diameter shell and spindle; potential for narrower pedal stance width Ngambenjawong C, Gustafson HH, Pun SH (2017) Progress in tumor-associated macrophage (TAM)-targeted therapeutics. Adv Drug Deliv Rev 114:206–221. https://doi.org/10.1016/j.addr.2017.04.010 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

Cons: Can’t use cup-mounted chain guides; shell is wider but still small in diameter; requires a separate bearing puller and press for service, bearing bores can wear out and loose tolerances Note: crankset for mounting on externally screwed in bearings, with a hollow axle 24 mm in diameter, is compatible whichever manufacturer produces it. So: Race Face X-type, FSA MegaEXO, Truvativ/SRAM Giga X Pipe (GXP), Campagnolo Ultra Torque – they are all compatible with Shimano Hollowtech II standard, so only Hollowtech II will be named in tables and remainder of the post. Very closely related to Trek’s BB90/BB95 system is the BB86/BB92 standard used by Scott, Giant, Pivot, and many others.Pros: Vast crankset compatibility, open standard, threaded design easy to service and prevent from creaking, same dimensions as PF30 García-Cayuela T, Korany AM, Bustos I et al (2014) Adhesion abilities of dairy Lactobacillus plantarum strains showing an aggregation phenotype. Food Res Int 57:44–50. https://doi.org/10.1016/j.foodres.2014.01.010 Specialized‘s OSBB system is nearly identical to BB/PF30 but with a few key differences, according to the company’s director of advanced research, Chris D’Aluisio.

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