Retrobike Forum Index

It is currently Wed Dec 07, 2016 3:21 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 47 posts ]  Go to page 1, 2, 3, 4, 5  Next
Author Message
PostPosted: Tue Jul 26, 2011 7:15 pm 
Old School Hero
User avatar

Joined: Sun Mar 27, 2011 2:09 am
Posts: 235
Location: Hull, Humberside
CARTRIDGE BOTTOM BRACKETS, brilliant aren't they...

Remember the old rubbish non-cartridge bottom brackets?
They look OK, but they continuously worked loose (The lock ring would work loose), the bearings got wet and worn easily, leading to creaks and seizing often for keen MTB cyclists. The one piece version of these is only found on really really cheap bikes and BMX, are even worse:

Image Image

Then came the much awaited & much praised cartridge bottom bracket, the installation does NOT have a lockring, the BB shell on the non-drive side, do NOT need adjustment afterwards, and they are smooth running for many years, even for keen MTB cyclists:
Image

Now we have a new style cartridge bottom, the cartridge Hollowtech II bottom bracket, unconventionally the bottom bracket AXLE is part of the crank (drive side), the bottom bracket consists of the bottom bracket shell cups and an AXLE sleeve, the drive side crank fixed axle passes through the drive side bottom bracket cup centre hole, then the non-drive side crank bolts on the drive side crank fixed axle:
Image Image Image
Lots of cyclists are riding these, but when the simple cheap cartridge bottom bracket works, why have a BB like these? Perhaps LESS bottom bracket shells seized in frames that would NOT have be removable with standard bb tool, would be possible to remove to Hollow tech style bb tool. The rationale of this is since standard cartridge BB's cup knurled edges DO NOT stick out of the frame, there is no surface to grip, as alternative removal (Other then flat blade screwdriver and hammer!), hence the following tools would not be of any use: Adjustable Wrench, Pipe Wrench and Mole Grips, whereas if knurled edges of Hollowtech BB shell did "round off" then possibly use Adjustable Wrench, Pipe Wrench or Mole Grips!

Perhaps there is an alternative purpose, more choice, perhaps, cyclists looking at buying MTB or upgrade their MTB would prefer a crank and BB that looks more sophisticated.

Also there is a number of splined axle bottom brackets:
Image

To generalise alot about what most people are riding on quality (Open to personnel interpretation!) MTB's:
~ BB shell diameter is a standard (Apart from BMXs and cheapest MTB's which are naff 1 piece cranks),
~ BB axle length differs on BIKES
~ Crank length is normally 1 of 2 types:
170mm (Normally 16" size bikes or less) or
175mm (Normally 16" sizes bikes or bigger).

I still say praise be to the original cartridge BB which is cheap, smooth running for years, and easy to fit and remove with specialist tool.
Image Image

Or the newer style HollowTech BB which I guess it's aesthetic styling will appeal to many, and from it's appearance and the necessary fitting/removal TOOL should be easy, tightening appears straight forward, guess this holds tight as might as conventional cartridge bottom brackets.
Image Image

ALSO IN A TOPIC ABOUT BOTTOM BRACKETS, this is worth mentioning when fitting/removing BB's:
~ DRIVE SIDE (R/H): TIGHTEN & LOOSEN OPPOSITE of NORMAL (i.e: Tighten = Anti-Clockwise or Slacken = Clockwise)
~ NONE DRIVE SIDE (L/H): TIGHTEN & LOOSEN AS NORMAL (i.e: Tighten = Clockwise or Slacken = Anti-Clockwise)

For more detailed instructions from EHOW see HERE.

The above is different to fitting PEDALS, L/H pedal/crank is reverse thread. Probably why so many people knacker the thread of their cranks, when taking off existing pedals, or fitting their new clipless SPD's.

HOW TO FIT PEDAL (NOTE: L/H PEDAL REVERSE THREAD & R/H PEDAL NORMAL THREAD)


Last edited by srands on Sun Jul 31, 2011 8:39 pm, edited 10 times in total.

Top
 Profile  
 
 Post subject:
PostPosted: Tue Jul 26, 2011 7:37 pm 
Gold Trader / rb Rider / Special
Gold Trader / rb Rider / Special
User avatar

Joined: Mon Aug 31, 2009 12:26 am
Posts: 16165
Location: Rurally close.
errr

I quite like external bb's
Cartridge bearings are a good thing in my opinion
A bit more user friendly too

And the cups stick out so would have a good place to grip if it was damaged
Or you could cut off the bit of the cup that sticks out to release the tension with minimal damage to frame, if your careful


Top
 Profile  
 
 Post subject:
PostPosted: Tue Jul 26, 2011 7:52 pm 
Old School Hero

Joined: Sun Jun 12, 2011 4:05 pm
Posts: 207
You have way too much time on your hands!!


Top
 Profile  
 
 Post subject:
PostPosted: Tue Jul 26, 2011 7:58 pm 
Retro Guru
User avatar

Joined: Mon Feb 01, 2010 11:45 am
Posts: 1136
Location: Poppy Fields
Less caps and more bold is an improvement.


Top
 Profile  
 
PostPosted: Tue Jul 26, 2011 8:00 pm 
Old School Hero
User avatar

Joined: Sun Mar 27, 2011 2:09 am
Posts: 235
Location: Hull, Humberside
jonnugget69 wrote:
You have way too much time on your hands!!


~ As a keen MTBer these days I rarely need to adjust/change parts on my bike.

~ As a cycle mechanic the preparation of new bikes (Cheap & Expensive), and repair/servicing of customers bikes (Cheap & Expensive), gives you a much greater appreciation of the type/setup/performance/longlivety of the majority of parts (But obviously front suspension forks and rear shocks, you can't really gain much of an opinion of their performance when riding off road).


Top
 Profile  
 
PostPosted: Tue Jul 26, 2011 8:11 pm 
Gold Trader / rb Rider / Special
Gold Trader / rb Rider / Special
User avatar

Joined: Mon Aug 31, 2009 12:26 am
Posts: 16165
Location: Rurally close.
srands wrote:
~ As a cycle mechanic the preparation of new bikes (Cheap & Expensive), and repair/servicing of customers bikes (Cheap & Expensive), gives you a much greater appreciation of the type/setup/performance/longlivety of the majority of parts


True

The only thing with the sealed bottom bracket tool is its very prone to the splines slipping out of place at the key moment


Top
 Profile  
 
 Post subject: Re: BB & MATRIX ANALOGY
PostPosted: Tue Jul 26, 2011 10:18 pm 
Old School Hero
User avatar

Joined: Sun Mar 27, 2011 2:09 am
Posts: 235
Location: Hull, Humberside
cyfa2809 wrote:
True. The only thing with the sealed bottom bracket tool is its very prone to the splines slipping out of place at the key moment


THIS MIGHT ROUND OFF IN A SECOND
Image Image Image


I BOUGHT THIS YESTERDAY, THIS DOESN'T FIT MINE, CAN I EXCHANGE IT?
Image Image Image


DO YOU HEAR ANY CREAKING?
Image Image Image


I FORGOT L/H WAS OPPOSITE THREAD, WOULDN'T WHY THE PEDAL DIDN'T WANT TO COME OFF!
Image Image


IS THIS TOO GOOD TO BE TRUE?
Image Image


HOW DO YOU FIT THESE?
Image Image


IS THIS GOING TO FIT? I'M COULD GET A PRO TO DO IT.
Image Image


IS IT EASIER TO TAKE OUT MY OLD BB SHELLS WITH MY WHEELS STILL ON? OR SHALL I'LL MESS ABOUT WITH IT ON THE FLOOR?
Image Image Image


THIS IS A LOAD OF REALLY OLD RUBBISH
Image Image


Last edited by srands on Tue Jul 26, 2011 10:25 pm, edited 2 times in total.

Top
 Profile  
 
 Post subject:
PostPosted: Tue Jul 26, 2011 10:21 pm 
Gold Trader / rb Rider / Special
Gold Trader / rb Rider / Special
User avatar

Joined: Mon Aug 31, 2009 12:26 am
Posts: 16165
Location: Rurally close.
?!!
:lol:
So i wasn't going mad when i had creaky bottom brackets


Top
 Profile  
 
 Post subject:
PostPosted: Tue Jul 26, 2011 11:58 pm 
Retrobike's #1 Comedy Genius
Retrobike's #1 Comedy Genius
User avatar

Joined: Thu Jan 04, 2007 8:07 pm
Posts: 4104
Location: Wolkenkuckucksheim
God help us when he discovers his balls............Image


Top
 Profile  
 
 Post subject:
PostPosted: Wed Jul 27, 2011 12:01 am 
King of the DuckBoard
King of the DuckBoard

Joined: Sun Jan 28, 2007 12:30 pm
Posts: 21466
I like the 'normal' BB square taper.

Had the modern BB collected dirt & mud like honey to a bee :x


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 47 posts ]  Go to page 1, 2, 3, 4, 5  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: DaveyBoyWonder, Factualgnome and 17 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

About Us

Follow Retrobike

Other cool stuff

All content © 2005-2015 Retrobike unless otherwise stated.
Cookies Policy.
bikedeals - the best bike deals in one place
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group