Origin8 Track/SS Chainring Issue
08-10-17 | 06:46 PM
#1
Thread Starter
Full Member
Joined: Sep 2015
Posts: 347
Likes: 1
From: Maryland
Bikes: Nashbar Race SIS, Spalding Road Step Through Single Speed, Kent Road Single Speed, 630 Cruiser, Fuji Odessa mountain bike
Origin8 Track/SS Chainring Issue
Just put a new crankset with chainring on a road bike. Put on a a chain, tightened nuts, and had a tight chain. But, when I started riding the chain fell off. I examined and it appeared the chain wasn't fitting in between the teeth in most parts of the chainring even when I tried to push it in.
The 3/32" chain measurement doesn't appear to me to be a problem because it is somewhat snug in spots and the ring is advertised as 3/32". My guess was the 1/2" measurement is at issue. My other guess was regarding the height of the chain. I have been using KMC Z33 and KMC Z50. I think it is the Z50 that is marked narrow. In any event, the chain I was using is marked narrow. Perhaps narrow regards the height and a limited height prohibits the rollers to fit in. But, as I think about it, I bet a too high chain could prohibit rollers from fitting in between teeth.
The 3/32" chain measurement doesn't appear to me to be a problem because it is somewhat snug in spots and the ring is advertised as 3/32". My guess was the 1/2" measurement is at issue. My other guess was regarding the height of the chain. I have been using KMC Z33 and KMC Z50. I think it is the Z50 that is marked narrow. In any event, the chain I was using is marked narrow. Perhaps narrow regards the height and a limited height prohibits the rollers to fit in. But, as I think about it, I bet a too high chain could prohibit rollers from fitting in between teeth.
08-10-17 | 07:08 PM
#2
Thread Starter
Full Member
Joined: Sep 2015
Posts: 347
Likes: 1
From: Maryland
Bikes: Nashbar Race SIS, Spalding Road Step Through Single Speed, Kent Road Single Speed, 630 Cruiser, Fuji Odessa mountain bike
I did use a lot of oil and then some degreaser to clean up. Maybe it needs more degreaser.
08-10-17 | 07:39 PM
#3
Senior Member
Joined: Feb 2012
Posts: 19,381
Likes: 5,528
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Liquids rarely are a problem when chains have teeth fit issues. So too with chain side plate (is this what is called "height") dimensions. What is a MAJOR factor in chain fit is the inner (between the side plates) width and what the tooth width is. So I suspect you have too narrow a chain for the teeth width. You know mislabeling does happen. But this is an easy fix. Andy
08-10-17 | 08:19 PM
#4
Senior Member
Joined: Jul 2015
Posts: 7,498
Likes: 3,301
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
"track" ring requires a 1/8" chain, which will not work if your bike has multiple rear gears.
single speed bike? get a 1/8" chain, plain and simple fix.
single speed bike? get a 1/8" chain, plain and simple fix.
08-10-17 | 08:26 PM
#5
Senior Member
Joined: Apr 2009
Posts: 39,897
Likes: 3,865
From: 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
It's actually very simple.
The plates shouldn't touch the chain ring. It's the rollers that should engage tyhe sprocket, with the plate's sole function being to keep the rollers coming at 1/2" on center intervals. When all is good, there's be slop between the inside of the inner plates and the sprocket.
The allowance for clearance on a 3/32" chain has just shy of what's needed for a hard fit on an 1/8" sprocket, but as noted, that's not a fit. So, either buy a 3/32"sprocket, or a 1/8" chain.
The plates shouldn't touch the chain ring. It's the rollers that should engage tyhe sprocket, with the plate's sole function being to keep the rollers coming at 1/2" on center intervals. When all is good, there's be slop between the inside of the inner plates and the sprocket.
The allowance for clearance on a 3/32" chain has just shy of what's needed for a hard fit on an 1/8" sprocket, but as noted, that's not a fit. So, either buy a 3/32"sprocket, or a 1/8" chain.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“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.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“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.
08-11-17 | 10:09 AM
#6
Thread Starter
Full Member
Joined: Sep 2015
Posts: 347
Likes: 1
From: Maryland
Bikes: Nashbar Race SIS, Spalding Road Step Through Single Speed, Kent Road Single Speed, 630 Cruiser, Fuji Odessa mountain bike
I was mistaken in believing the ring to be 3/32". As suggested, a 1/8" chain was needed.
Thread
Thread Starter
Forum
Replies
Last Post
TallRider
Singlespeed & Fixed Gear
3
10-14-12 11:59 PM
Tristanh666
Singlespeed & Fixed Gear
9
02-18-11 09:47 AM
