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 07-20-10, 07:14 AM   #1
Captain Rich
Junior Member
Thread Starter
 
Join Date: Jul 2010
Bikes:
Posts: 14
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
vibration

What would cause a vibration in the rear hub of a single speed beach cruiser? You can feel it even
when walking the bike. The vibration seems to propagate to the handlebars when riding.

Thanks,
Rich
Captain Rich is offline   Reply With Quote
Old 07-20-10, 07:20 AM   #2
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 30,903
Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 910 Post(s)
Twenty to one your chain is too tight. Chainrings and sprockets aren't perfectly concentric, and it's easy to over-tension the chain if you set the wheel while in a low spot.

Turn your pedals while feeling tension in the middle of either section. At the tightest point ease the rear wheel forward so there's a minimum of 1/16" of free play up and down across the chain. Or there should be a few degrees of free play in the crank with the rear wheel locked.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 07-20-10, 07:48 AM   #3
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: 29,123
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 180 Post(s)
Assuming it's a single-speed, not a fixed gear, and you feel the vibration when walking the bike when the chain isn't moving, a tight chain may not be the cause.

Check both tires to be sure there isn't a bulge or something caught in the tread. If the tires are good, spin both wheels to see if there is damage or a flat spot in a rim from an impact. Finally, remove the wheels and spin them to see if the hubs are bad or an axle is bent.
HillRider 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 02:03 AM.