XTOOLS PRO ITL BOTTOM BRACKET TAP ISO

Currently, 24mm is the accepted norm compared to square-taperвЂ™s relatively minuscule 17mm diameter.Д®xternal bottom brackets for 30mm spindles do exist, such as those from White Industries, allowing modern 30mm-diameter axle cranks to be used. The idea is simple, by moving the bearings outboard of the shell, you can then use a much larger spindle. Square taper bottom brackets also fit in most shells designed for external cup bottom brackets, but to keep things simple, we will only cover the modern standard here. Modern, external cup threaded bottom brackets are among the most common of standards. Conventional/ISO/BSA threaded bottom brackets WeвЂ™ve also included a section on how you can (or canвЂ™t as the case may be) change between different bottom bracket standards and an explainer on why there are so many standards in the first place. CeramicSpeed now offers a fully integrated bearing (akin to T47) that will fit 30mm spindles Other notesВ Threaded shell can be made with better tolerances and can be replaced if it wears out. New integrated CeramicSpeed BB fits 30mm spindle cranks InstallationВ Threaded BB shell takes aluminium shell, which is then fitted with BB86 bearing cupsД¬ompatibilityВ Originally designed for BB86 cranksets and bearings. Essentially an oversized BSA external BB Thread Fit 82.5Д«B shell inner diameterВ 41mm (when shell is fitted) Other notesВ Aims to solve creaking issues of press fit systems. Proprietary?В No (Chris King & Argonaut Cycles)Д¬ompatibilityВ Cross compatible dependent on spindle length Other notesВ Matches the wide bearing spacing of a BSA external BB with a large 30mm spindle T47 Other notesВ Matches the wide bearing spacing of a BSA external BB with a large 30mm spindle BB392EVO Other notesВ Similar asymmetric concept as Cannondale Ai, but the shell is wider BB386EVOД¬ompatibilityВ Will take 386EVO cranks and traditional external BB cranks

Other notesВ Similar asymmetric concept as Cannondale Ai, but the shell is wider BBRight (Press Fit) Other notesВ Essentially the Pressfit version of BB30A and BB30-83 BBRight (Direct Fit) An older 84.5x46mm BB appears to be obsolete. Other notesВ OSBB for mountain bikes appears to be PF30 (post 2010). An older Pressfit 61x46mm BB appears to be obsolete OSBB (Mountain) Other notesВ OSBB for Specialized Road bikes appears to just be BB30.

InstallationВ Pressed 6806 bearings with circlips in BB shellД¬ompatibilityВ Designed for specific BB30 cranks Other notesВ Analogous to BB30 above, but uses pressed cups (with identical bearings) for relaxed manufacturing tolerances OSBB (Road)

Wider overall shell is also claimed to improve bearing support PF30Д¬ompatibilityВ Originally designed for BB30 cranks Other notesВ Asymmetric BB shell which is wider on non-driveside. Other notesВ Narrow overall width means longer spindles can be used with appropriate spacers BB30A and BB30-83 AiД«B shell widthВ 73mm (BB30A), 83mm (BB30-83) InstallationВ 6806 bearings pressed into frame with circlips to locate in BB shellД¬ompatibilityВ Designed for specific BB30 cranks, 24mm step-down spacers available Proprietary?В No (open Cannondale standard) Other notesВ Similar to above, but a non-proprietary version with less stringent tolerances BB30 Other namesВ PF41 (Hope вЂ“ refers to BB shell diameter), PF24 (Chris King вЂ“ refers to spindle diameter) Other widths may be named according to shell dimensions: 89.5mm, 104.5mm, 107mm, 121mm, 132mmД¬ompatibilityВ Originally designed for 24mm spindles, but some BBs that fit a 30mm spindle are available Other notesВ The extra width of the BB cups is replaced with more frame real-estate BB86/BB92Д«B shell widthВ 86.5mm road, 91.5mm MTB. InstallationВ Pressed bearings with stepped BB shellД¬ompatibilityВ Designed specifically for 24mm spindles, no 30mm option Other notesВ Can be prone to undoing itself because non-driveside is a standard thread BB90/BB95 Other notesВ External cups now exist that will take 30mm spindles Italian threadedД«B shell inner diameterВ 1.375in (34.92mm) x 24 TPI

XTOOLS PRO ITL BOTTOM BRACKET TAP ISO

Other notesВ Bottom bracket must be specced with correct shell width and spindle length ISO threaded externalД«earing inner diameterВ 24mm (Hollowtech II), 24/22mm (GXP), 25mm (Ultratorque/Powertorque)

Road bike groupsets: everything you need to knowД«ottom bracket standards and compatibility ISO threaded internalД«earing inner diameterВ N/A, internal BBs have integrated spindleД«B shell widthВ 68mm road, 73mm mountain, 83mm downhill, 100/120mm fat bikeД¬ompatibilityВ Square taper, Octalink, ISIS.

Before we get stuck into the nitty-gritty of each standard though, weвЂ™ve put together this helpful crib sheet that runs through all of the key specifications.

Xtools pro itl bottom bracket tap