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Cult Bottom Brackets

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54 Questions : 56 Answers

Q&A for Bottom Brackets category

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Bottom Brackets

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Age: 45 to 54
Gender: Male
Attitude: Passionate and Obsessive
1 year, 2 months ago
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AYLESBURY,GB
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Answer: 
The 2012 Trek came origionally specified with a Shimano M552 chainset. These use the Hollowtech external bottom brackets, two options are soon below.

The bottom bracket is very easy to change and can be done with the below tool. You simply loosen the two pinch bolts and remove the pre-load bolt from the left hand crankarm. The chainset will slide off allowing you to change the bottom bracket.
1 year, 1 month ago
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Answer: 
I used the bb51 and it failed after a few hundred miles.

Very poor.

I would avoid any of this style BB, even the expensive ones seem to have poor reviews (once people have used them for a bit).

I would stick with one of the other BB designs. I had an octalink (i think) that lasted 6k+ miles, that i replaced as i could not get a new crank set i that would fit it any more…
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1 year ago
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Okehampton,GB
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Hola, tengo unas bielas con sistema BB30 y quiero montarlas en un cuadro con sistema de pedalier de rosca 137,24.
Existen los adaptadores? Si son tan amables me indican qué ´piezas y en su caso los códigos debo comprar para poder montar las bielas en el nuevo cuadro. Es una bici de mtb
Quedo a la espera de sus noticias.
Gracias y un saludo.
Age: 45 to 54
Gender: Male
Attitude: On the up
1 year, 2 months ago
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Badajoz,ES
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Answer: 
Lamentablemente si tienes un sistema BSA (Standard Thread) no podrás montar el sistema BB30.
Te recomendamos comprar unas bielas BB30, encontraras muchas opciones en nuestra web!
Saludos!
1 year, 2 months ago
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Answer: 
Hola amigo. Yo monté un pedalier FSA afterburner BB30 adquirido aquí,en un sistema de 63mm normal,ingles. Monte unas cazoletas ROTOR BB30, con rodamientos de 30, claro está. Eso si, debes hacer algo de bricomania, y adaptar los espaciadores para que pisen bien en las pistas de los rodamientos, y que al apretar la biela no quede frenada. Va perfecto. Siempre que el eje del pedalier tenga la suficiente longitud para atravesar los 63mm de la caja.
Age: 45 to 54
Gender: Male
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2 months ago
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alcobendas,ES
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1 answer

Sram BB GXP sizes

why the difference in size 68 and 70mm?
Age: 55 to 64
Gender: Male
1 year, 2 months ago
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Answer: 
The 68mm and 70mm are two different standards in bottom bracket shell. The 68mm size is a British/English (BSA) threaded standard. The 70mm is better known as the threaded Italian standard.

The type a frame needs is determined by measuring the width of the bike frames bottom bracket shell.
1 year, 2 months ago
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Age: 55 to 64
Gender: Male
1 year, 1 month ago
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STOKE-ON-TRENT,GB
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Answer: 
An E-Type Octalink bottom bracket has a larger collar on the drive-side cup to enable use with bottom bracket mounted (e-type) front derailleurs or chain guides.
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1 year, 1 month ago
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1 answer

addapter Z0 crank in a BSA BB frame

want to use my 3x10 X0 crank in a moutainbike frame BB Type : BSA English Thread, is it possible whith any adapters?
Age: 45 to 54
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1 year ago
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Answer: 
To fit your XO crankset (GXP only) in a standard threaded BB shell you will require a 68-73mm GXP bottom bracket as linked below.
 
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1 year ago
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Age: 55 to 64
Gender: Male
Attitude: Passionate and Obsessive
1 year ago
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Answer: 
Shimano Hollowtech II cranks (24mm spindle) are not compatible with the BB30 system (30mm spindle) due the variation in size of the Bottom Bracket bearings and the Crankset Spindle.
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1 year ago
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FSA Mega Exo

What bottom bracket tool would fit the FSA Mega Exo bottom bracket?
Age: 17 or under
Gender: Male
Attitude: Passionate and Obsessive
1 year ago
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Answer: 
The Mega-Exo system is essentially a clone of the Shimano Hollowtech II system, so standard tools should fit fine
Age: 25 to 34
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1 year ago
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Or what Shimano BB is compatible? Is the Saint ok?
Gender: Male
11 months ago
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Coulsdon,GB
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Answer: 
When using a Truvativ/SRAM crankset; a GXP crankset is required to run it effectively on the bike.

Whether the bike has a Threaded or Pressfit bottom bracket; both options are available.
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SRAM BB92 PressFit Alloy MTB Bottom Bracket
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11 months ago
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Age: 65 or over
Gender: Male
Attitude: Passionate and Obsessive
11 months ago
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sydney,AU
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Answer: 
The BB90 is intended for use with a Shimano XTR Mountain Bike Crankset; it is cross-compatible but not necessarily optimal.

Using a Road specific bottom bracket could be the upgrade required for better performance on your bike.
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11 months ago
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What bottom bracket/crank can I use

Hi I am looking to build up a bike, I have a Titus fireline ti frame which has a 73mm width for the bottom bracket and I was looking to get the Hope bottom bracket and run it on a 10 speed double crank (probably looking at the shimano XT). What would I need to make this all work as they don't look like they have the spindles included? Previously I have used the octalink bottom brackets and corresponding crank on my other bike but I get through these in no time.
Many thanks in advance
Laurence
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11 months ago
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Hoddesdon,GB
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Answer: 
This bottom bracket is compatible with the Shimano Hollowtech II cranksets (see suggestion below) for which the new Shimano 10-speed cranks all have.

The spindle is integrated into the crankset and the bottom bracket acts as a bearing housing for the crankset to mount through.
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11 months ago
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