Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-06-09, 05:59 AM   #1
adlai
Senior Member
Thread Starter
 
Join Date: Jun 2009
Bikes:
Posts: 493
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
INstalling a smaller crankset.

Currently I run a 52-42-30 triple on my roadbike, 175mm arm length.

I need to replace it. The crank arm is cracked.

I'm thinking of replacing it with this

http://www.amazon.com/Shimano-M191-1...9559848&sr=8-1

shimano m191, primarily b/c it's 48t and it has a chainguard.

Anything to look out for? How about front derailleur adjustment? is this doable?
adlai is offline   Reply With Quote
Old 08-06-09, 07:01 AM   #2
Gonzo Bob
cycles per second
 
Gonzo Bob's Avatar
 
Join Date: Oct 2003
Location: Minnesota
Bikes: Vitus Aluminum, DiamondBack Apex, Softride Powerwing 700, "Generic" Ishiwata 022, Trek OCLV 110
Posts: 1,790
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by adlai View Post
How about front derailleur adjustment?
You'll need to lower your front derailer by about 8mm for best shifting. On some bikes a with bracket mount (aka "braze-on") front derailer, the bracket does not allow the derailer to be lowered that much. If you have a clamp-on front derailer, there should be no problem.

You will likely also need a new bottom bracket unless your current crank happens to use the exact same type and axle length.
Gonzo Bob is offline   Reply With Quote
Old 08-06-09, 07:44 AM   #3
adlai
Senior Member
Thread Starter
 
Join Date: Jun 2009
Bikes:
Posts: 493
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
that's what i thought.
adlai is offline   Reply With Quote
Old 08-06-09, 08:32 AM   #4
fuzz2050
Real Men Ride Ordinaries
 
fuzz2050's Avatar
 
Join Date: Sep 2008
Bikes:
Posts: 3,707
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
I feel I must say, that looks like a rather cheap (quality) crank, and I would probably steer you some other direction. You can get a forged 110/74 triple on Ebay for about the same price, and it would be a much better buy in my mind.
fuzz2050 is offline   Reply With Quote
Old 08-07-09, 04:27 PM   #5
adlai
Senior Member
Thread Starter
 
Join Date: Jun 2009
Bikes:
Posts: 493
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i actually have a truvativ sitting on my desk right now...except I realized that it's isis

the chainguard is a big appeal to me, as I regularly get my right leg dirty with my bike.
adlai is offline   Reply With Quote
Old 08-07-09, 07:57 PM   #6
AndrewP
Senior Member
 
Join Date: Sep 2001
Location: Montreal
Bikes: Peugeot Hybrid, Minelli Hybrid
Posts: 6,521
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Try cleaning your chain
AndrewP is offline   Reply With Quote
Old 08-08-09, 09:53 AM   #7
adlai
Senior Member
Thread Starter
 
Join Date: Jun 2009
Bikes:
Posts: 493
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
beyond that though, like I"ll get my shoelaces tied up in the crank, I've actually scratched my right leg -- there are scars, from the crank.
adlai is offline   Reply With Quote
Old 08-08-09, 10:47 AM   #8
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Shoelaces and bicycles don't go together well.
Al1943 is offline   Reply With Quote
Old 08-08-09, 11:24 AM   #9
Garthr
Senior Member
 
Join Date: Oct 2008
Location: where
Bikes: Franklin Frames Custom, Rivendell Bombadil
Posts: 1,289
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by adlai View Post
Currently I run a 52-42-30 triple on my roadbike, 175mm arm length.

I need to replace it. The crank arm is cracked.

I'm thinking of replacing it with this

http://www.amazon.com/Shimano-M191-1...9559848&sr=8-1

shimano m191, primarily b/c it's 48t and it has a chainguard.

Anything to look out for? How about front derailleur adjustment? is this doable?

Are you aware this crank had non replaceable chainrings?

As far as keeping your leg clean and undamaged . . . yes. . . simply wipe the chain after each ride. Shoelaces? No problem. I wear shoes that have very long shoelaces. . . I double tie them, and tuck the leftover underneath the forefoot laces so they don't flop around.
Garthr is offline   Reply With Quote
Old 08-08-09, 05:38 PM   #10
adlai
Senior Member
Thread Starter
 
Join Date: Jun 2009
Bikes:
Posts: 493
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
what? I'd replace the whole crank obv.

update: I've decided to stay with the truvativ elita. I'll get around to installing it when I receive the BB. Changing the crankset to something like that would have permanently changed the identity of the bike.
adlai is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 04:31 AM.