What does BB stand for?

The bottom brackets, cables, pulleys and springs are under great tension and should ONLY be repaired by a garage door professional.

You should check that the rod overhangs the carpet runner an equal distance on each side, and then carefully screw the top half of the bracket to the bottom bracket piece to secure the stair rod in place.

A bottom bracket -- that axlelike thingy that connects the two crank arms holding the pedals -- that's shot and sounds like a meat grinder when you pedal.

Surely, the timing of the letter is to attempt to put up a smokescreen covering the Labour leader's refusal to stand down on his tinkering with the bottom bracket income tax rates?

Plus, instead of the CIF putting third-seeded La Canada in the bottom bracket, they were in our bracket, so we played them in the semifinals instead of maybe Windward (of Los Angeles)," Kelly said.

Put the old hub/axle/stick in the rear end of the frame so the chain can rest on it, then using the paintbrush and the old water bottle with the degreaser clean the chain, the front and rear derailleur, chain rings and cranks, brakes and any other metal parts, try not to get it on the saddle, handlebar tape and don't get too much on the headset and bottom bracket bearings.

Bottom Bracket – This is what is attached from the bike''s body to the crankset.

4 There are two bottom brackets - one for the left and one for the right of the window.