Sign up for our weekly newsletter for updates on frames and other informative bike-y stuff. It won't irritate you.

We're open, in person at RBW HQ, by appointment. Click here

The Sam Hillborne presale is live here

Bottom Brackets

A bottom bracket is usually shortened in talk to "BB." It's the bearing and spindle assembly that connects the left and right crank arms and allows smooth and easy turning. The crank and BB don't have to be the same brand, but they have to be compatible, to result in an offset (technically, "chain line") that in turn is compatible with your front derailer.

Stick with us—we know all this stuff and make it easy for you. All of our BB's are "square taper," and fit the normal English-threaded, 68mm wide frame "hangers" (the part they go in.) Here's our old Bottom Bracket installation video.
Bottom Bracket - Cartridge - 68mm - Shimano

Bottom Bracket - Cartridge - 68mm - Shimano

Bottom Bracket - Cartridge - 68/73mm - Phil Wood

Bottom Bracket - Cartridge - 68/73mm - Phil Wood

$198.00
$198.00
Bottom Bracket Retaining Rings - Phil Wood

Bottom Bracket Retaining Rings - Phil Wood

$65.00
$65.00
Tool - Phil Wood Bottom Bracket Tool

Tool - Phil Wood Bottom Bracket Tool

$23.00
$23.00
IRD QB55 - Square Taper Bottom Bracket

IRD QB55 - Square Taper Bottom Bracket

$40.00
$40.00
Tool - Park Bottom Bracket Pin Spanner, green (SPA-1)

Tool - Park Bottom Bracket Pin Spanner, green (SPA-1)

$14.00
$14.00
Tool - Park Bottom Bracket Fixed-Cup Wrench/pin spanner (HCW-4)

Tool - Park Bottom Bracket Fixed-Cup Wrench/pin spanner (HCW-4)

$37.00
$37.00
Tool - Park Bottom Bracket Lockring Wrench (HCW-5)

Tool - Park Bottom Bracket Lockring Wrench (HCW-5)

$26.00
$26.00
Loose Ball Bottom Brackets - 68mm - Tange

Loose Ball Bottom Brackets - 68mm - Tange

$130.00
$130.00
Bottom Bracket - Cartridge - - 73mm -- Shimano

Bottom Bracket - Cartridge - - 73mm -- Shimano

$20.00
$20.00
Bottom Bracket cable guide, Shimano

Bottom Bracket cable guide, Shimano

$3.00
$3.00
Hobson Zingo Cartridge Bottom Bracket tool

Hobson Zingo Cartridge Bottom Bracket tool

$14.00
$14.00
Hobson-Zingo BB Adjustable Cup Pin Spanner for Tange Traditional Bottom Bracket

Hobson-Zingo BB Adjustable Cup Pin Spanner for Tange Traditional Bottom Bracket

$7.00
$7.00
Bottom Bracket - White Industries, square taper, stainless steel

Bottom Bracket - White Industries, square taper, stainless steel

$165.00
$165.00
Rivendell Bicycle Works • Ever Since 1994