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 09-05-09, 08:14 PM   #1
Noobert
I am Noobert.
Thread Starter
 
Join Date: Aug 2009
Bikes:
Posts: 427
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Bought a K2 childrens bike today, questions

Disclaimer: I don't have a micrometer.

So I bought a k2 arapahoe 20'' childrens mountain bike today. Tires held hair so I was riding it around the store, and it seemed mechanically sound, so I bought it. 10 dollars spent at salvation army.

I want to make it ridable for my self. The quill stem appears to be bigger then 1''. What size could it be? (how many different possibilities.) Also, aany body take a wild guess on the seat post size?

Also: What would you guess the rear spacing to be? (Its has a 7 speed freewheel)

I don't have measuring tools.

Has any one ever heard of doing this? Links?
Noobert is offline   Reply With Quote
Old 09-05-09, 08:55 PM   #2
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
1) Buy a micrometer
2) If the stem is guaranteed not 1" it's 1" 1/8.
3) Rear spacing guess on 7 speed freewheel 126mm.
operator is offline   Reply With Quote
Old 09-05-09, 10:48 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)
I said earlier that he should buy a digital-caliper. Now you say a micrometer. Well - go get 'em, Noobert. And my guess is 130mm for the rear dropouts. And buy a tape-measure - measure from the center of the bottom-bracket to the top of the seat-tube. Not the seatpost - top of the tube. That's your frame-size.

Got pictures?
Panthers007 is offline   Reply With Quote
Old 09-06-09, 06:23 AM   #4
Bianchigirll 
Bianchi Goddess
 
Bianchigirll's Avatar
 
Join Date: Apr 2009
Location: Camp Hill, PA
Bikes: Too many to list here check my signature.
Posts: 22,652
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 87 Post(s)
I am not sure about a micrometer but definitly a nice set of vernier calipers. after years of using standard ones and the cross to meteric with me spoke ruler I finally bought a digital set.

my question is are you very petite? why do you wish to ride a bike with 20" wheels?

also are we confusing micrometers with calipers?

http://image.snapon.com/international/pdf/micb103a.pdf

http://buy1.snapon.com/catalog/item....re&dir=catalog
__________________
Bianchis '87 Sport SX, '90 Proto, '90 Campione del Fausto Giamondi Specialisma Italiano Mundo, '91 Boarala 'cross, '93 Project 3, '86 Volpe, '97 Ti Megatube, , '90 something Vento 603,

Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '09 Motobecane SOLD, '?? Jane Doe (still on the drawing board), '90ish Haro Escape
Bianchigirll is offline   Reply With Quote
Old 09-06-09, 07:24 AM   #5
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 29,111
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 174 Post(s)
Quote:
Originally Posted by Panthers007 View Post
I said earlier that he should buy a digital-caliper. Now you say a micrometer. Well - go get 'em, Noobert. And my guess is 130mm for the rear dropouts. And buy a tape-measure - measure from the center of the bottom-bracket to the top of the seat-tube. Not the seatpost - top of the tube. That's your frame-size.
The OP described this as a kid's bike so I expect the 20" refers to the wheel size, not the frame size. Assuming the OP is an adult or at least a teen, I also question why he wants to ride such a small bike. My 9 year old grand daughter rides a 20" wheel Trek kid's MTB and she's small for her age.

Given it has a 7-speed freewheel, I further expect the dropout width is 126 mm.

The stem could be nearly anything as I don't think this thing has a threadless steerer so it could be 1" or 1-1/8" or neither.

A digital or vernier caliper and a decent metric ruler should answer all of the dimension questions.
HillRider is offline   Reply With Quote
Old 09-06-09, 09:14 AM   #6
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)
Bianchigirll: The digital-caliper you've linked to isn't representative of what's currently available. The d-c's available through places like Amazon.com go for $10 and up. They are all the same manufacture. Can $12 digital-calipers be accurate? YES! I calibrated some sets with my $$$ dial-caliper. They are accurate/readable to .02mm.
Panthers007 is offline   Reply With Quote
Old 09-06-09, 10:59 AM   #7
Noobert
I am Noobert.
Thread Starter
 
Join Date: Aug 2009
Bikes:
Posts: 427
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I want to expierence 20'' multispeed wheels. Ill probally adventually just it for parts, the wheel set should work well on a project some day
Noobert 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 12:30 AM.