Shimano SM-BBR60 (BSA) Ultegra Bottom Bracket

£13.79
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Shimano SM-BBR60 (BSA) Ultegra Bottom Bracket

Shimano SM-BBR60 (BSA) Ultegra Bottom Bracket

RRP: £27.58
Price: £13.79
£13.79 FREE Shipping

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Cranksets with 30 mm wide spindles won’t fit into frames with BB86, or BB90 BBs, but with correct BB some can be made to fit into threaded frames. SRAM claims that the focus on optimising the bearings resulted in a spindle diameter of 28.99mm. This places is right between SRAM’s old 24mm GXP cranks and 30mm spindles of modern cranks. BB shell width 86.5mm road, 91.5mm MTB. Other widths may be named according to shell dimensions: 89.5mm, 104.5mm, 107mm, 121mm, 132mm This system has a number of different names depending on who you talk to. It is also called PF86, PF92, PF24 (Chris King) and PF41 (Hope). 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

Cons: Metal-on-metal interfaces can be prone to creaking; requires a separate bearing puller and press for service; requires high manufacturing tolerances; bearing seats can’t easily be faced post-manufacturing; not all BB30 cranks will fit Del Re B, Sgorbati B, Miglioli M, Palenzona D (2000) Adhesion, autoaggregation and hydrophobicity of 13 strains of Bifidobacterium longum. Lett Appl Microbiol 31(6):438–442. https://doi.org/10.1046/j.1365-2672.2000.00845.x Miura K, Kodama Y, Inokuchi S et al (2010) Toll-like receptor 9 promotes steatohepatitis by induction of interleukin-1beta in mice. Gastroenterol 139(1):323–334e327. https://doi.org/10.1053/j.gastro.2010.03.052 http://www.chainreactioncycles.com/us/en/shimano-ultegra-6800-11-speed-groupset/rp-prod110818?utm_campaign=bazaarvoice&utm_medium=Default&utm_source=AskAndAnswer&utm_content=Default This performance boost comes with no other changes to basic dimensions: the left bearing stays in the same spot; the aluminium cup is simply replaced with carbon frame now. And since the bearing’s in the same spot, the lateral position of the left crank isn’t changed at all, so Q-factor is also unchanged. Your feet are in exactly the same place as before.”

PF30, OSBB, BB386EVO if it matches the spindle length, BB30A if the crankset has spacers on the left side Other names PF41 (Hope – refers to BB shell diameter), PF24 (Chris King – refers to spindle diameter) Chain reaction Cycles and CRC are trading names of Wiggle Ltd (In Administration) registered in the United Kingdom at 1000 Lakeside, Suite 310, Third Floor N E Wing, Portsmouth, Hampshire, PO6 3EN,

Shi Y, Zheng W, Yang K et al (2020) Intratumoral accumulation of gut microbiota facilitates CD47-based immunotherapy via STING signaling. J Exp Med 217(5). https://doi.org/10.1084/jem.20192282 Other notes Matches the wide bearing spacing of a BSA external BB with a large 30mm spindle BB392EVO In general weight savings are the primary driver of the higher BBs. It would not be reasonable to assume that they are more durable.The most significant [advantage] is a stiffer frame,” says Trek mountain bike product manager John Riley. “Secondarily, BB90/95 offers a lighter overall solution by replacing traditional alloy bearing cups with integrated carbon bearing bores. It also provides a simplified installation process.” The explosion of standards is not good for consumers or dealers,” Doyne continues. “The bottom line is that bike companies are driving the standards. Threaded systems have very few limitations — they are easily cleaned and repaired at the shop level, and they do not affect the bearing fit.” Crank designs that will fit: Standard 24mm external type (Shimano Hollowtech II, SRAM GXP, Campagnolo Ultratorque and Powertorque, FSA MegaExo, Race Face X-Type, etc), square taper, ISIS, BB386EVO, BB392EVO many others. Crucially external cups that fit 30mm spindles do exist. If you have any questions (or additions and corrections), please use the BikeGremlin forum’s compatibility section:

Cons: Same as BB90/95 in theory, but in practice there are generally less issues experienced due to the less stringent tolerances Very closely related to Trek’s BB90/BB95 system is the BB86/BB92 standard used by Scott, Giant, Pivot, and many others.Azam R, Ghafouri-Fard S, Tabrizi M et al (2014) Lactobacillus acidophilus and Lactobacillus crispatus culture supernatants downregulate expression of cancer-testis genes in the MDA-MB-231 cell line. Asian Pac J Cancer P 15(10):4255–4259. Our] Hollowgram SiSL2 crank with SpideRing weighs 484g. By comparison, Dura-Ace 9000 weighs around 678g [we recorded 637g in our review – ed]. In addition to weight, another BB30 advantage is stiffness. By increasing the spindle diameter, you increase its resistance to twisting, which is where the bulk of the deflection in a crankset comes from. Roughly 70% of total deflection measured at the pedal comes from axle twist.” Krausova G, Hyrslova I, Hynstova I (2019) In vitro evaluation of adhesion capacity, hydrophobicity, and auto-aggregation of newly isolated potential probiotic strains. Fermentation 5(4). https://doi.org/10.3390/fermentation5040100 Pros: Claims of improved sealing and durability, compatible with major BB standards, cross-compatibility for DUB cranksets



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