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


Go Back   > >

General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

User Tag List

Reply
 
Thread Tools Search this Thread
Old 07-02-09, 07:54 PM   #1
myrtillerose
Junior Member
Thread Starter
 
Join Date: Jul 2009
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
cranks on department store bikes?

My friend recently bought me a cheap 70's department store bike (10-speed) but it's not in my possession yet. I'm hoping to convert it to a fixed gear. I was wondering if anyone knows what type of crank these bikes typically have. But my real question is: will I be able to remove extra chainrings and just use the largest one? (I'm trying to avoid buying a new crank)

Thanks!
myrtillerose is offline   Reply With Quote
Old 07-02-09, 08:03 PM   #2
c_m_shooter
Senior Member
 
c_m_shooter's Avatar
 
Join Date: Sep 2006
Location: Paradise, TX
Bikes: Surly Cross Check, Redline Monocog 29er, Generic Track bike, Surly Pugsley, Salsa Fargo, Schwinn Klunker
Posts: 1,542
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Probably a one piece crank with the chainrings rivited together. I only have one bike with that type of crank and the chainrings are replacable. They can be bought from anyplace that stocks BMX parts.
c_m_shooter is offline   Reply With Quote
Old 07-02-09, 08:10 PM   #3
Panthers007
Great State of Varmint
 
Panthers007's Avatar
 
Join Date: Sep 2008
Location: Dante's Third Ring
Bikes:
Posts: 7,479
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yep - and they are called by the name of the place where they were first manufactured in quantity: Ashtabula (Ohio) cranks.
Panthers007 is offline   Reply With Quote
Old 07-02-09, 08:22 PM   #4
myrtillerose
Junior Member
Thread Starter
 
Join Date: Jul 2009
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Cool! So it's probably best that I buy a new crankset? I don't know what kind of BB the bike has yet since it's not in my hands. I'm thinking of buying a new BB as well... but of course, this little project of mine is becoming not so cheap anymore! Any tips? What would you do?
myrtillerose is offline   Reply With Quote
Old 07-02-09, 08:38 PM   #5
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Catrike 559, Merin Bear Valley (beater bike).
Posts: 26,744
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 144 Post(s)
Quote:
Originally Posted by myrtillerose View Post
Cool! So it's probably best that I buy a new crankset? I don't know what kind of BB the bike has yet since it's not in my hands. I'm thinking of buying a new BB as well... but of course, this little project of mine is becoming not so cheap anymore! Any tips? What would you do?
That's do-able but it will bump up the cost factor. Do you remember the song about a $10 dollar horse and a $40.00 saddle?

There's actually 2 different ways to do it:
1. Buy a BMX 3 piece crank.
2. Buy a press-in adapter and a cartridge road bike bottom bracket and crankset.

If you decide to keep the one piece crank you'll probably want a chainring in about the 40 tooth range.
Retro Grouch is offline   Reply With Quote
Old 07-02-09, 09:00 PM   #6
myrtillerose
Junior Member
Thread Starter
 
Join Date: Jul 2009
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Haha, yeah. Saving money is definitely important for me. Thanks for your tips!

I had an idea. I was at the bike co-op near me and they had 170mm cranksets for $21 (I'd like 165mm but I'll settle) and bottom brackets for cheap too (I'd probably by a 103mm?). It would still save me money.

Would that work?
myrtillerose is offline   Reply With Quote
Old 07-02-09, 09:05 PM   #7
Panthers007
Great State of Varmint
 
Panthers007's Avatar
 
Join Date: Sep 2008
Location: Dante's Third Ring
Bikes:
Posts: 7,479
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I'd be interested to know, too. But I have little experience in trying to swap out a low-level Ashtabula for a 3-piece cotterless crankset. What kind of bottom-bracket does this crankset at the Co-op have?
Panthers007 is offline   Reply With Quote
Old 07-02-09, 09:28 PM   #8
myrtillerose
Junior Member
Thread Starter
 
Join Date: Jul 2009
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Well, the co-op has a large variety of cranksets and BBs laying around. I'm very new at this stuff, so I didn't really have a close look at the BBs... I need to go back there. But I would think they have a bunch of different kinds. This is my first attempt at a fixed gear conversion so I'm really not too concerned about having great quality parts, I just want the bike to work My plan is to walk in, grab the crankset I want and find a BB that fits, hehehe.
myrtillerose 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 06:10 AM.