Are 68 and 73 bottom brackets interchangeable?
Multiple spacers are included in order to fit both sizes meaning if you see a BB for sale that says 68/73 it means it will fit both but it includes a couple spacers in the box to make it fit the 68, those spacers (or fewer of them) are not needed if the shell is 73mm wide.
What is an 84 spindle?
This is a Weld in Trailer Spindle that will accommodate a 3500 lb Straight Trailer axle Beam and corresponding wheel bearings. This Spindle is referred to as a #84 Spindle, using a 1 3/8″ ID Inner Wheel Bearing and a 1 1/16″ ID Outer Wheel Bearing. Additionally, this Spindle uses the standard 1.72″ ID Seal Surface.
What is spindle length bike?
Spindles are also specified by spindle length, which is simply the length end-to-end. As an example, a particular bottom bracket may be specified with a 47.5mm chainline, and a 113 spindle length. A crank arm designed for use with this spindle will have the middle of the crankset 47.5mm from the bike center line.
What size spindles do I need for my brackets?
“3” series spindles normally fit 68 mm ISO/British/French bottom brackets. “5” series spindles normally fit 70 mm Italian bottom brackets, also 68 mm French with thin cups.
What is the chainline of a 118mm ISIS Drive spindle?
Thus, if you know the chainline is 48.5 mm with a 113 mm ISIS Drive spindle length, then you automatically know that if you use a 118 mm ISIS Drive spindle length your chainline will increase by 2.5 mm (each crank moves outward 2.5 mm, for a total of 5 mm). Chainline is measured from the centerline of the frame to the center of the chain.
Are all Shimano cartridge bottom brackets interchangeable?
Shimano Cartridge Bottom Brackets 1 Model designations include: Square Taper: CT21, LP27, UN40, UN51, UN52, UN71, UN72, UN91. These are all interchangeable if the other numbers match. 2 Shell width in millimeters: 68 for standard ISO/British 70 for Italian 73 for oversized ISO/British. 3 Length: overall spindle length in millimeters.
What size Shimano derailer do I Need?
Shimano spec, measured to the middle ring. 47.5 preferred, but for frames with oversized seat tubes, the longer dimension may be needed, because the fat tube places the derailer mechanism farther to the right. Wider chainline need for chainstay clearance on MTBs.