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

New: Take Part in the May's Giveaway: Win the LIVALL PikaBoost 2 E-bike Conversion Kit


Chainset problems!
#1
I have a 2003 giant OCR frameset and I built it up with Sora groupset... so far so good, has made a nice budget racer. But I wanted to up grade to standard chainrings, 53/39, so i bought a Truvativ elita chainset. Fitted it no problem... but,when on small ring and i go to use any of the bottom 3 sprockets at the rear the chain changes to big ring at front without touching front mech! The chain line seems very extreme, any solutions out there?
  Reply
#2
The chances are that the chain is catching the "lift pins/ramps" on the rear of the big ring.
Scroll down page:-
http://www.sheldonbrown.com/gloss_ra-e.html

The only suggestion I have is to fit a wider bottom bracket to move the chainset out a bit.
(You just might be able to fit a 2mm or 3mm spacer behind the right side of the existing bottom bracket to give a bit extra offset. I have done this on a couple of bikes with Shimano cartridge types.)
Ride hard or ride home alone!
  Reply
#3
Actually you shouldn't run the extreme gear combinations, so it is not that... bad. Check the specs (BB width) of the old and the new derailleur to see if there are differences.
  Reply
#4
Well apparently the problem lies with the Elita being a 10 speed chainset and i'm running it on a 9 speed system! Ive been informed by the people i bought it off that it will work on 9 speed but may have a problem with the slightly wider chain of the 9 speed. Its a shame they didn't mention that when i first asked them! The bottom bracket cannot be spaced due to it being a sram GXP variety which doesn't except spacers! And I know those bottom 3 gears shouldn't be used, but we all do sometimes.....? Thanks for replies.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
12,054
01-24-2014, 12:51 PM
Last Post: nfmisso
 
11,215
11-28-2009, 06:18 AM
Last Post: cyclerUK

Forum Jump:

[-]
10 Latest Posts
POLL: Are non-recumbent riders looking a...
Today 01:02 PM
Safest bike helmets
Today 04:14 AM
Mental Health Warning: Recumbents May Ca...
Yesterday 01:09 PM
The great thing about trikes
Yesterday 12:48 PM
Cycling industry is pricing out their ow...
Yesterday 10:07 AM
How waterproof are eBikes?
05-20-2025 09:38 PM
Ebike
05-20-2025 05:37 PM
Colnago restoration
05-20-2025 12:29 PM
Urtopia Carbon Fold
05-19-2025 12:25 PM
Wearable Fitness Trackers
05-19-2025 10:30 AM

[-]
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. Flowrider
21 posts
no avatar 2. Painkiller
19 posts
no avatar 3. GirishH
13 posts
no avatar 4. meamoantonio
12 posts
no avatar 5. enkei
12 posts