Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the September Giveaway for Vvolt Sirius E-bike valued at $2999


Single speed chainring conversion
#1
Actually the bike was already a single speed but the gear inches were too high. I chucked out the heavy steel stock crankset & had cassette brng. alu cranks put in with a smaller (34 tooth) chainring and the longest pedals i could find. (17 mm.)

Problem is that the chain line isn't quite straight. The freewheel needs slight spacing out from the hub, and that won't work without sacrificing the freewheel's thread bite. Also, any spacer wd. have no backing and hence butt up against the spokes. (there's no adjustment play at the crankset, wh. is already flush with the frame)

Is there anything doable? if left as is, am i looking at more chain wear than if it led straight?
  Reply
#2
Re-space the rear axle and re-dish the spokes or get a BB with a shorter spindle.
A spacer behind the freewheel (if the right size) would butt up against the same shoulder the freewheel does, so it shouldn't hit the spokes. But, you're right, more than a couple mm of spacer weakens the freewheel to hub junction.

A little misalignment of the chainline (<1 cm?) is probably OK. Maybe more chain and chainring wear and higher chance of chain popping off.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
17,660
09-20-2013, 05:07 AM
Last Post: MorganIRL
 
21,434
07-10-2011, 11:34 AM
Last Post: nfmisso
 
14,906
12-20-2010, 01:44 PM
Last Post: DaveM
 
34,004
06-21-2010, 09:17 AM
Last Post: xerxes
 
10,106
01-05-2010, 11:00 PM
Last Post: Alex Ramon
 
15,109
08-17-2009, 03:29 AM
Last Post: DaveM

Forum Jump:

[-]
10 Latest Posts
What are your best biking places in your...
Yesterday 10:00 PM
650B vs 650C which one is perfect for mo...
Yesterday 09:54 PM
Schwinn Le Tour sagging chain
Yesterday 09:06 PM
What was your first bicycle?
Yesterday 08:21 AM
bike riding is a fun! isn't it ???
10-01-2022 02:16 PM
Campagnolo Freehub Lockrings
10-01-2022 05:13 AM
Biking and running apps
09-30-2022 08:27 PM
Newbie
09-30-2022 08:20 PM
Campy 10 speed cassettes
09-30-2022 09:53 AM
Where are you from and What is your favo...
09-29-2022 05:03 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Jesper
21 posts
no avatar 2. ichitan
16 posts
no avatar 3. ReapThaWhirlwind
6 posts
no avatar 4. jasmin122
4 posts
no avatar 5. SPINMAN
3 posts