![]() ![]() Shorter chainstays give you a spirited, lively ride.Rigid carbon fork for precise steering and light weight.Ladies and gentlemen, the the 29er has evolved! Key Features The specs are just as legit with Race Face cranks powering Shimano 1 x 10 gearing and a clutch rear derailleur that virtually eliminates chain slap and drops. That 148mm-wide rear end is enhanced by short chainstays that make this 29er rail twists and turns like that's its job. Trek loaded the aluminum frame with all the marks of a fully capable trail bike: G2 trail geometry, E2 tapered head tube, 92mm bottom bracket, dropper-post routing and a Boost 148 rear end. The 29er has grown up from its XC roots with Trek's Stache 5. Big wheels roll over the roots and 3-inch-wide tyres rip through berm. Direct-Fit refers to individual bearings pressed directly into the frame with no removeable BB cups.The trail waits in anticipation, the woods are quiet, then WHOOSH! The sound of tyres pierces the silence.The bearings are then pressed into the cups. Press-Fit refers to aluminum or plastic bottom bracket cups, which are pressed into the frame.Or, have a professional bike mechanic do the work for you. To accurately identify your frame's BB shell, always measure the ID and width. Wheels Mfg does not offer any compatible bottom brackets for Italian threaded frames.Wheels Mfg does not make the threaded cups for these frames. ![]() Aluminum cups are threaded into the frame that result in the BB86 standard (41mm ID x 86.5mm width). * Colnago standard with a threaded BB shell. * Essentially a PF30 with 92mm wide shell. * Essentially a PF30 with 86.5mm wide shell. BB shell is 83mm wide, but symetricalįrame's bottom bracket shell is threaded with M47 x 1 threads. For the PF30A-83 frames, the BB shell is 5mm wider on the drive side and +10mm wider on the non-drive side.Ĭannondale Asymmetric Integration (Ai) found on Scalpel-Si and F-Si System frames. Specialized carbon road frames with 61mm wide shells for use with Specialized FACT cranks.Īsymetrical BB shell is +5mm wider on the non-drive side (PF30A). Also used by 3T.īB shell is 11mm wider on the non-drive side. Bottom Brackets for 24mm & 22/24mm Dia Spindle CranksĬervelo Frames except R5ca.For the BB30A-83 frames, the BB shell is 5mm wider on the drive side and +10mm wider on the non-drive side. BB shell is 11mm wider on the non-drive side.Īsymetrical BB shell is +5mm wider on the non-drive side (BB30A). May use removable c-clips as bearing stops, or the bottom bracket shell may have molded or machined bearing stops.Ĭervelo R5ca Frames only. Bottom Brackets for 29mm Dia Spindle Cranks (DUB)Ħ806 bearings are pressed directly into the frame.Bottom Brackets for 30mm Dia Spindle Cranks.Some brands call this PF41, describing the frame shell diameter instead of the crank spindle diameter. Bearings are pressed directly into frame.ĭesigned to be used with 24mm spindle diameter cranks (Shimano HollowTech II), hence the PF24 designation. Once you determine your bottom bracket standard, you then need to Identify Your Crankset. The chart below lists most of the current bottom bracket standards found on today's frames. Then measure both the inner diameter and width of your frame's bottom bracket shell. To accurately determine the bottom bracket standard in your frame, it is best that you remove your crankset, and any installed bottom bracket cups or bearings. Finding the correct bottom bracket for your frame can be challenging. ![]()
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