Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Bottom Bracket Help

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Bottom Bracket Help

Old 05-10-15, 09:48 AM
  #1  
Enoch Powell
Junior Member
Thread Starter
 
Join Date: Jul 2014
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Bottom Bracket Help

Hi

I need a new bottom bracket for my mountain bike.
I have removed the old one which has written on it: PowerPro BB-7120, BC1.27x 24T L <68> R

I would like to replace it with this: Shimano XT-SLX BB70 Hollowtech II Bottom Bracket | Chain Reaction Cycles
Then I can fit a better chainset to it.
Is this possible?

Any help / guidance greatly appreciated!
Attached Images
File Type: jpg
BB.jpg (27.3 KB, 12 views)
Enoch Powell is offline  
Old 05-10-15, 09:54 AM
  #2  
cpach
Senior Member
 
Join Date: Oct 2009
Location: Mt Shasta, CA, USA
Posts: 1,861

Bikes: Too many. Cannondale SuperSix, Trek Remedy 8, Trek Crossrip+ get the most ride time.

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 414 Post(s)
Liked 202 Times in 160 Posts
By a chainset I assume you mean crankset? If that is the case, then yes, that bottom bracket is compatible with the bottom bracket shell in your frame. They are both british/ISO threaded for a 68mm width shell
cpach is offline  
Old 05-10-15, 10:08 AM
  #3  
SkyDog75
Senior Member
 
Join Date: May 2011
Location: Upstate NY
Posts: 3,794

Bikes: Bianchi San Mateo and a few others

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 633 Post(s)
Likes: 0
Liked 10 Times in 6 Posts
"Chainset" and "crankset" are interchangeable terms. It just depends on which side of the Atlantic you're on.

As for a new bottom bracket, it's standard practice to choose your new crankset, then buy the appropriate bottom bracket to mate that crankset to your frame. The numbers on your old bottom bracket indicate it's British-threaded and 68 mm wide. That's the most common standard by far, so you should have no problem finding a crankset and bottom bracket to fit.
SkyDog75 is offline  
Old 05-10-15, 10:42 AM
  #4  
Bill Kapaun
Really Old Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Posts: 12,661

Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 1337 Post(s)
Liked 558 Times in 422 Posts
+1
Buying the BB first is like buying a wheel and then finding a bike it fits.
Bill Kapaun is offline  
Old 05-10-15, 11:07 AM
  #5  
Enoch Powell
Junior Member
Thread Starter
 
Join Date: Jul 2014
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Sorry I meant crankset. I want to fit something like this: Shimano Deore M590 9 Speed Triple Chainset | Chain Reaction Cycles however I have no idea which boltcircle, length or teeth I should go for.

I also need a derailleur to go with it, I was thinking something like this: Shimano XT M786 Shadow+ 10 Speed Rear Mech | Chain Reaction Cycles

The read wheel has a nine speed cassette on right now but I can get one with ten on if need be.
I'll need a new chain too if anyone has any suggestions
Enoch Powell is offline  
Old 05-10-15, 11:12 AM
  #6  
trailangel
Senior Member
 
trailangel's Avatar
 
Join Date: Feb 2014
Location: Pasadena, CA
Posts: 4,616

Bikes: Schwinn Varsity

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1765 Post(s)
Liked 528 Times in 312 Posts
Chainset is a perfectly acceptable term to use.
trailangel is offline  
Old 05-10-15, 12:55 PM
  #7  
alcjphil
Senior Member
 
alcjphil's Avatar
 
Join Date: Jun 2002
Location: Montreal, Quebec
Posts: 4,413
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 1140 Post(s)
Liked 544 Times in 358 Posts
Originally Posted by Enoch Powell View Post
Sorry I meant crankset. I want to fit something like this: Shimano Deore M590 9 Speed Triple Chainset | Chain Reaction Cycles however I have no idea which boltcircle, length or teeth I should go for.

I also need a derailleur to go with it, I was thinking something like this: Shimano XT M786 Shadow+ 10 Speed Rear Mech | Chain Reaction Cycles

The read wheel has a nine speed cassette on right now but I can get one with ten on if need be.
I'll need a new chain too if anyone has any suggestions
If you buy that rear derailleur, you will have to make sure that your shifters are 10 speed.That derailleur will not work with anything other than a 10 speed shifter. You cannot change the cassette to 10 speed without changing the shifter
alcjphil is offline  
Old 05-10-15, 05:51 PM
  #8  
Enoch Powell
Junior Member
Thread Starter
 
Join Date: Jul 2014
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Ok thanks, I'll add a shifter to the list.
Enoch Powell is offline  
Old 05-10-15, 06:05 PM
  #9  
alcjphil
Senior Member
 
alcjphil's Avatar
 
Join Date: Jun 2002
Location: Montreal, Quebec
Posts: 4,413
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 1140 Post(s)
Liked 544 Times in 358 Posts
Originally Posted by Enoch Powell View Post
Ok thanks, I'll add a shifter to the list.
You can't change only one shifter
Start pricing all this out. Make sure that your bike is worth the cost of upgrading all these components
At this point you are looking at crankset, derailleurs, shifters, chain, and cassette.
Make sure that your bike is good enough to warrant all these upgrades

Last edited by alcjphil; 05-10-15 at 06:17 PM.
alcjphil is offline  
Old 05-11-15, 04:53 AM
  #10  
Enoch Powell
Junior Member
Thread Starter
 
Join Date: Jul 2014
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by alcjphil View Post
You can't change only one shifter
Start pricing all this out. Make sure that your bike is worth the cost of upgrading all these components
At this point you are looking at crankset, derailleurs, shifters, chain, and cassette.
Make sure that your bike is good enough to warrant all these upgrades
I don't know what bike it is. I bought it off a local Facebook 'for sale' page. It's all been sprayed black but it seems quite light
Enoch Powell is offline  
Old 05-12-15, 12:17 AM
  #11  
mulp
Newbie
 
Join Date: May 2015
Location: Merrimack, NH
Posts: 4

Bikes: Terratrike Rover with e-bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Enoch Powell View Post
I don't know what bike it is. I bought it off a local Facebook 'for sale' page. It's all been sprayed black but it seems quite light
I'm thinking the Whole Earth Access to Tools advice applies here: buy what you need, not what you want to need.
mulp is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
hybridbkrdr
Bicycle Mechanics
3
06-08-18 01:23 PM
ginshun
Singlespeed & Fixed Gear
2
06-16-13 07:00 PM
howieleem
Singlespeed & Fixed Gear
6
05-28-13 05:21 PM
tdsherman325
Bicycle Mechanics
1
01-09-13 07:47 PM
ClaySwartz
Bicycle Mechanics
6
09-20-12 04:23 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.