Cycling Equipment · Public discussion

chain un-stretch?

Started by Larry English · · Last activity · 3 posts · 758 views

← Back to Cycling Equipment

Thread details

What we know about this thread

Original section
Cycling Equipment
Published
12 August 2003
Last activity
12 August 2003
Original author
Larry English
Posts
3
Discussion status
Public discussion
Total views
758
Views / 30 days
0
Topics
Chain wearIndoor trainers

The navigation and discussion metadata provide context. Posts remain in their original chronological order.

Showing posts 1–3 of 3
Posts remain in their original chronological order.

Text size
  1. Original post
    Larry English
    Archived post
    #1

    i have been measuring chain stretch on my shimano chain. 8 speed sora components. i think it;s an
    "hg" style chain.

    i replaced it at 3000 miles. so these measurements start at 3000 miles.

    at 3600 miles, i logged 0.8/16" stretch at 4000 miles, 1.0/16" at 4300 miles, 0.1/16" at
    4555, 0.1/16"

    you might think there has been a change in measurement procedure. yes, but if anything, it should
    measure more lengthening in the later measurements. i now put the chain under a lot of tension when
    measuring this.

    i am pretty sure the measurements are right, but what are they measuring?

    i do try to keep it pretty clean.

    i use the absolute thinnest lubricants, silicone spray and powdered ptfe.

    i do ride a lot, probably 100-150 miles a week on that bike.

    could it be that dirt or rust or something has built up on the rollers, taking up the slack for what
    must still surely be 1/16 worth of wear?

    should i just not worry until i can measure 1/16 again?

    should i just say, ok, well that chain has gone 1500 miles, time to replace it, if it;s gone that
    long and is measuring all screwy like that?

    wle.

    Report
  2. James Annan
    Archived post
    #2
    larry english said:


    could it be that dirt or rust or something has built up on the rollers, taking up the slack for
    what must still surely be 1/16 worth of wear?

    That's certainly possible in theory, there is a comprehensive web page on the subject of chain suck
    which aruges convincingly (to me) that dirt-induced chain 'shrink' can be a major factor in this
    phenomenon (typically when a new chain is used on slightly worn chainrings, a mistake I have made in
    the past). This is however more likely with muddy MTB conditions, I couldn't say how likely it is to
    be the case in your situation.

    James

    Report
  3. Larry English
    Archived post
    #3

    James Annan <[email hidden]> wrote in message news:<[email hidden]>...

    Quoted message said:
    larry english said:


    could it be that dirt or rust or something has built up on the rollers, taking up the slack for
    what must still surely be 1/16 worth of wear?

    That's certainly possible in theory, there is a comprehensive web page on the subject of chain
    suck which aruges convincingly (to me) that dirt-induced chain 'shrink' can be a major factor in
    this phenomenon (typically when a new chain is used on slightly worn chainrings, a mistake I have
    made in the past). This is however more likely with muddy MTB conditions, I couldn't say how
    likely it is to be the case in your situation.

    right, there has been zero mud, and i am not using a sticky or gunky lube.

    wle.

    Quoted message said:


    James

    Report

Keep exploring

Browse the sectionCycling Equipment Return to CyclingForumsStart at the home page Search discussionsFind another thread

Active in the last 60 minutes

Active in this thread

0 users · 0 guests ·0 bots ·0 total

No signed-in users are active right now.

No known search crawlers active right now.