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Bottom bracket size - Bianchi S.A.S.S.

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Probably 73x113

if you want to be sure, measure the width of the Bottom Bracket shell (on the frame) with a ruler, it will either be 68 or 73, but 73 is the standard for MTB.

if you are using the original single speed crank, 113 will work fine. if you are adding gears you will need something wider.

Posted on Oct 31, 2012


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Bottom bracket size

Typical mountain bicycles are 73mm, though modern (in the last 5 or so years) some have been going to 68mm. You can measure the bottom bracket shell. That is the part of the frame where the bottom bracket is inside. Measure from edge to edge without including the cups of the bottom bracket itself.

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Bottom bracket size on 2011 gary fisher rig. no idea what size to get

Best is to show the bike to a bike shop and they should advise the size of bottom bracket and types available, for free. From my experience shops want to see the physical bike even if they have the bike spec on book.

Dec 08, 2013 | Gary Fisher Rig

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It would be helpful to anyone looking at your request to give a few details! I am assuming that you mean the bracket that is the hold-down bracket either oin the bottom edge of the battery or across the top. If it is a bottom bracket that presses into the groove of the battery, you need along extention with a 3/8 or close to that size socket. Loosten the bolt quite a bit until the battery is able to be wobbled from under its clinch. If it is the bracket across the top the bolts are on the bottom of the two down rods and can be loostened with the 3/8 inch open end wrench until the side rods offer enough play to push the top cross piece over the battery edge.

Jan 01, 2013 | 1995 Buick LeSabre

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Bottom bracket need replaced. needs a new crank set. what size if the bottom bracket and what size crank set is recommended, or does the bottom bracket need to come out to find the size. bought the...

impossible to tell you without knowing the bike brand and model and year, although you have provided that 1999.

If you take into a bike shop, which is the usual place to purchase the parts you need, they will be able to tell you what size Bottom Bracket will fit your bike, also what options you will have for replacement cranks and bottom bracket. This could be a very complicated issue when replacing with parts that are 11-12 years newer, the shop will be best equipped to give you all your options.

Apr 07, 2011 | Cycling

1 Answer

Getting a clicking sound from the bottom bracket area. I have a Denali Pro. Can I replace the bottom bracket and what size

Yes, of course you can replace the bottom bracket.

First though you will want to make sure that the clicking noise is in-fact coming from the bottom bracket. Even though it sounds like it is coming from that area there are other things that can cause a clicking noise, such as the examples below.

Front derailleur cable end hitting the crank-arm is a common clicking noise.
Pedals can also cause a clicking noise that sounds like its the bottom bracket.
chain rubbing the front derailleur
chain has a kink in it.

The size of your bottom bracket is related to a few factors:
1 - thread pitch (your bike is english)
2 - Bottom bracket width (your bike is 68)
3 - Crank style and brand. This I do not know for your particular bike as you did not provide the year of the bicycle or brand of crank, and they change.

Taking off cranks and removing and installing a bottom bracket requires many bike specialty tools and is probably not the best project if you have never done this before or own the tools. It will be far less expensive to have your local bike shop replace the Bottom Bracket then to do it yourself. Plus they can tell you what size it needs and if the click is even coming from that part or not.

Dec 10, 2010 | Cycling

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I am trying to find out what size the Mongoose sx43 is. It is from 2000 and is bright yellow.

It could be one of several sizes. To determine the size you can measure the bike from the center of the bottom bracket (where the cranks install into the frame) up the seat tube to the top of the frame. This will give you the size of your bicycle.

Nov 10, 2010 | Mongoose Exile 26 Men's Full-Suspension...

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Have a old american flyer road bike and want to change bottom bracket. not sure what size

Go to a bike shop and let them measure your cranks. Do you have a one piece or three piece crank? Do you have metric wrenches? Bottom bracket tool? You have to know the answers to these things to get the right size bearings, if it is a one piece you more than likely have a #66 but without seeing it, who knows.

Oct 26, 2010 | Eastern Bikes 19mm American Bmx Bottom...

1 Answer

The bar that attaches to the pedal needs some kind of pin to put the pedal back on.

I think I know what you are asking, but you haven't given me much to go on. Here are the names of the parts going from pedal to pedal -- pedal, crank arm, bottom bracket arbor, crank arm, pedal. Are you asking about attaching the crank arm to the bottom bracket arbor? And if so, are you missing the tapered pin that older bikes used to make this attachment? If so, the crank arm has 3 holes in it - one for the pedal, one for the bottom bracket arbor, one for the tapered pin. And your bottom bracket arbor will not have a square end, but will have a round end with a flat spot about 3/8 inches square. If you are missing this pin, then take the bike to a bike shop. It's a very inexpensive part, but might be hard to find the right size- or might require a little modification to fit. good luck Al K

Oct 15, 2010 | Cycling

1 Answer

I have a jamis cross country 2.0 bike. the bottom bracket creaks. not sure why.

One or both of your crank arms are probably loose. Try pulling and pushing (pretty hard) on the pedal end of the crank arm (toward the bike and away from the bike) If it's loose, it will be apparent. The arbor of the bottom bracket is usually square on the ends, and this is tapered (the square is bigger closest to the bike) You just need the right size wrench to tighten the nut that holds the crank arm onto the bottom bracket arbor.

Oct 01, 2010 | Cycling

1 Answer

Cant get the pins out of the crank brackets on the bottom of the crank. got the bolts out but there are pins on each side of the bolts. most engines have two more bolts on the outside edge but this one...

The bottom bracket is the dohickey that connects your two crank-arms together, and secures them within the bottom of the bike frame. The bottom bracket has threads around the outside that secure it into the hole in the frame. Inside, bearings surround a rotating spindle -- this lets the pedals turn free from the frame. Each side of the spindle has a mechanism to connect your crank. This may be square tapered bolts, a toothed ring (splined bottom bracket), or even a threaded bolt. The bottom bracket type must match the crank type (a crank with a square hole must be mounted on a BB with the square receiver).
Bottom brackets also come in different widths, and with different spindle widths: the bracket width should match the frame, and the spindle width should put the cranks out away from the frame, and allow the front derailleur to transfer the chain onto the smallest ring without hitting the bike frame. The BB will usually have its size printed on the cartridge, but you have to take it out to read the numbers. For example, a 68x116 bottom bracket is 58 mm wide as it fits into the frame, and the spindles are 116 mm apart. If you wanted the pedals a bit closer together, you might buy a 68x112.5 BB.
Sealed Bottom Bracket: If your bottom bracket is a sealed cartridge unit (as most are nowadays), it can't be serviced or adjusted. If it grinds, wobbles, or catches, it must be replaced as a unit. Just remove the old cartridge and replace the entire thing.
Take the chain off the chainrings, and lay it on the frame next to the bottom bracket. With the bike clamped in a workstand, shove the base of the crank-arms side-to-side to detect motion in the bottom bracket. Now try to pull the cranks away from, then back towards the bike to detect wobble. Turn the crank and listen for noises within the bottom bracket. These tests will help you identify a damaged bottom bracket.
To replace the bottom bracket, you have to do some major stripping! You must remove both the left crank and the right crank arm plus chainrings. See the crank section for additional information.
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