Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Fifty Plus (50+) Share the victories, challenges, successes and special concerns of bicyclists 50 and older. Especially useful for those entering or reentering bicycling.

Reply
 
Thread Tools Search this Thread
Old 07-22-11, 04:54 PM   #1
TomD77
Senior Member
Thread Starter
 
TomD77's Avatar
 
Join Date: Jul 2010
Location: Florida Panhandle
Bikes:
Posts: 572
What's happening with my crankset? (pictures)

Cleaning my chain today before lubing and started looking closely at stuff. This bike has 2700 miles and is 105 componentry level. Of the miles, I guess 85%+ have been using the large ring in a compact gearset (50/34), maybe more since I'm rarely in the 34.

Any rate, the front large gear doesn't look right, the teeth look worn with the tops of some gone. How many miles can you expect from a crankset anyway? It is 1000 miles into the 2nd chain.

Below are shots of the crankset large gear, small gear and rear casette. From my limited experience, only the front large gear looks bad. Seems that I should get a bunch more than a few thousand miles from a crankset. This is Florida and there is sand everywhere. Am I getting fast wear because of the sand?





TomD77 is offline   Reply With Quote
Old 07-22-11, 04:57 PM   #2
Ridinmurray
Senior Member
 
Join Date: Dec 2010
Location: Murray Ky
Bikes: Specialized
Posts: 245
Some of them are supposed to be that way to aid in shifting, right ???
Ridinmurray is offline   Reply With Quote
Old 07-22-11, 05:00 PM   #3
ericm979
Senior Member
 
ericm979's Avatar
 
Join Date: May 2007
Location: Santa Cruz Mountains
Bikes:
Posts: 6,170
Yep.
ericm979 is offline   Reply With Quote
Old 07-22-11, 05:01 PM   #4
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 18,086
+1, you are noticing the changes made to make your index shifting work ..
the tips get lowered so the chain does not have to climb those peaks.

Lift pins on the other side aide chain pickup, too.
fietsbob is offline   Reply With Quote
Old 07-22-11, 05:01 PM   #5
oilman_15106
Senior Member
 
Join Date: May 2005
Bikes:
Posts: 6,900
Does not look excessively worn to me for the mileage stated. Your chain is going to need replaced long before the chain ring. I never have but know riders who have gotten 20,000 miles out of chain rings.
oilman_15106 is offline   Reply With Quote
Old 07-22-11, 05:05 PM   #6
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 18,086
as said here, elsewhere , earlier..
2 chain replacements, to a cassette replacement , by the time you need your 3rd cassette , you probably need new chainrings..

Pre-emptive chain replacement is good.
fietsbob is offline   Reply With Quote
Old 07-22-11, 07:13 PM   #7
doctor j
Senior Member
 
Join Date: Aug 2006
Location: Central Louisiana
Bikes:
Posts: 2,860
Chain rings and cogs are much too clean. You need to ride more.

Chain rings and cogs look good.

11,000+ miles on my Fuji. Three or four chains in that time. Chain rings and cogs are fine.
doctor j is offline   Reply With Quote
Old 07-22-11, 07:27 PM   #8
Wogster
Senior Member
 
Wogster's Avatar
 
Join Date: Jul 2006
Location: Toronto (again) Ontario, Canada
Bikes: Norco Bushpilot (out of commission), Raleigh Delta
Posts: 6,941
Quote:
Originally Posted by TomD77 View Post
Cleaning my chain today before lubing and started looking closely at stuff. This bike has 2700 miles and is 105 componentry level. Of the miles, I guess 85%+ have been using the large ring in a compact gearset (50/34), maybe more since I'm rarely in the 34.

Any rate, the front large gear doesn't look right, the teeth look worn with the tops of some gone. How many miles can you expect from a crankset anyway? It is 1000 miles into the 2nd chain.

Below are shots of the crankset large gear, small gear and rear casette. From my limited experience, only the front large gear looks bad. Seems that I should get a bunch more than a few thousand miles from a crankset. This is Florida and there is sand everywhere. Am I getting fast wear because of the sand?





I would say the chain rings look fine, the teeth are shaped weird to aid in shifting. I would also say it looks a little dry, how often do you lube your chain and what do you use?
Wogster is offline   Reply With Quote
Old 07-22-11, 08:21 PM   #9
JanMM
rebmeM roineS
 
JanMM's Avatar
 
Join Date: Jan 2006
Location: In Central IN
Bikes: RANS V3, RANS V-Rex, RANS Screamer
Posts: 13,217
Go to a bike shop and take a close look at brand new chainrings and cassettes; you'll see that the teeth are not all the same, as previously noted.
Is your shifting ok?

There are still chainrings on the market that don't have the shifting aids and that have identical teeth.
__________________
RANS V3 - Ti, RANS V-Rex - cromo, RANS Screamer - cromo
JanMM is offline   Reply With Quote
Old 07-22-11, 08:48 PM   #10
alanknm
Senior Member
 
Join Date: Feb 2011
Location: Toronto
Bikes: Specialized SL2 Roubaix Comp
Posts: 707
Looks OK to me and I agree with Wogster, that chain looks dry.
alanknm is offline   Reply With Quote
Old 07-22-11, 09:29 PM   #11
BluesDawg
just keep riding
 
BluesDawg's Avatar
 
Join Date: Feb 2005
Location: Milledgeville, Georgia
Bikes: 2015 Specialized AWOL Comp frameset (custom build), 2015 Zukas custom road, 2014 Specialized Crave Pro 29, 2003 KHS Milano Tandem, 1986 Nishiki Cadence rigid MTB, 1980ish Fuji S-12S
Posts: 13,191
Chainrings look fine. I would think they look dry because you had just cleaned the chain and were about to lube it.

How did you scrape your front derailleur?
BluesDawg is offline   Reply With Quote
Old 07-23-11, 05:59 AM   #12
TomD77
Senior Member
Thread Starter
 
TomD77's Avatar
 
Join Date: Jul 2010
Location: Florida Panhandle
Bikes:
Posts: 572
Quote:
Originally Posted by BluesDawg View Post
Chainrings look fine. I would think they look dry because you had just cleaned the chain and were about to lube it.

How did you scrape your front derailleur?
That would be correct, I had just spent about a half hour with a bucket with purple cleaner/degreaser and a nylon brush that looks like an over scale tooth brush.

I'm not sure how the derailleur got scraped, the chain was thrown somehow in a crash I had 6 weeks ago and I'll bet it happened then. The scrape is a lot more obvious in the flash reflection than it is looking at the bike.

Glad to hear that the crankset is fine, thanks for the help.

Quote:
Originally Posted by Wogster View Post
I would also say it looks a little dry, how often do you lube your chain and what do you use?
As above, the chain was just cleaned as happens about every 3 weeks or around 400-500 miles. I'm trying a new lube on the recommendation of a friend who is still into motocross. It is Dupont multi-purpose spray dry wax lube w/teflon and moly that supposedly out performs other lubes by 5 to 1. Very interesting stuff read this http://www.webbikeworld.com/t2/motor...chain-lube.htm

I got an 11 oz spray can at Lowes for less than $5

Last edited by TomD77; 07-23-11 at 06:14 AM.
TomD77 is offline   Reply With Quote
Old 07-23-11, 06:36 AM   #13
donheff
Senior Member
 
donheff's Avatar
 
Join Date: Jun 2007
Location: Capitol Hill, Washington, DC
Bikes: Specialized Tricross Comp
Posts: 1,309
Quote:
Originally Posted by TomD77 View Post
. I'm trying a new lube on the recommendation of a friend who is still into motocross. It is Dupont multi-purpose spray dry wax lube w/teflon and moly that supposedly out performs other lubes by 5 to 1. Very interesting stuff read this http://www.webbikeworld.com/t2/motor...chain-lube.htm

I got an 11 oz spray can at Lowes for less than $5
That does look like some interesting stuff. Anyone else have any pros and cons about this stuff?
donheff is offline   Reply With Quote
Old 07-23-11, 07:39 AM   #14
TomD77
Senior Member
Thread Starter
 
TomD77's Avatar
 
Join Date: Jul 2010
Location: Florida Panhandle
Bikes:
Posts: 572
Quote:
Originally Posted by donheff View Post
That does look like some interesting stuff. Anyone else have any pros and cons about this stuff?
If you read the reviews here (link) at Amazon, you'll see that they are all raving and are about 50/50 motorcycle/bicycle. I did immediately notice that the lube is totally dry and doesn't attract grime.

Do a google search and start reading, very interesting stuff.
TomD77 is offline   Reply With Quote
Old 07-23-11, 09:12 AM   #15
Wogster
Senior Member
 
Wogster's Avatar
 
Join Date: Jul 2006
Location: Toronto (again) Ontario, Canada
Bikes: Norco Bushpilot (out of commission), Raleigh Delta
Posts: 6,941
Quote:
Originally Posted by TomD77 View Post
That would be correct, I had just spent about a half hour with a bucket with purple cleaner/degreaser and a nylon brush that looks like an over scale tooth brush.

I'm not sure how the derailleur got scraped, the chain was thrown somehow in a crash I had 6 weeks ago and I'll bet it happened then. The scrape is a lot more obvious in the flash reflection than it is looking at the bike.

Glad to hear that the crankset is fine, thanks for the help.



As above, the chain was just cleaned as happens about every 3 weeks or around 400-500 miles. I'm trying a new lube on the recommendation of a friend who is still into motocross. It is Dupont multi-purpose spray dry wax lube w/teflon and moly that supposedly out performs other lubes by 5 to 1. Very interesting stuff read this http://www.webbikeworld.com/t2/motor...chain-lube.htm

I got an 11 oz spray can at Lowes for less than $5
Wonder if it's available here in Canada anywhere......
Wogster is offline   Reply With Quote
Old 07-23-11, 10:06 AM   #16
donheff
Senior Member
 
donheff's Avatar
 
Join Date: Jun 2007
Location: Capitol Hill, Washington, DC
Bikes: Specialized Tricross Comp
Posts: 1,309
Looks like Dupont markets at least three similar versions. The one already linked to is called "Teflon Multiuse Lubricant." Amazon also has one called Teflon Chain Saver Lubricant." Not clear if there is any difference other than price - the chain saver version is $3 more. Then there is a more generically named "Teflon Non-Stick Dry-Film Lubricant." Leaves you wondering which one to get -- I lean to the original $5 can.
donheff is offline   Reply With Quote
Old 07-23-11, 10:36 AM   #17
John E
feros ferio
 
John E's Avatar
 
Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Bikes: 1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
Posts: 16,817
To maximize the life of your chainrings and cogs, replace your chain by the time it elongates 1/2 percent, i.e., 1/16" per 24 half-links, which started out exactly 12" long.
__________________
"Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1981 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
John E is offline   Reply With Quote
Old 07-23-11, 10:52 AM   #18
XR2
Senior Member
 
XR2's Avatar
 
Join Date: Aug 2009
Location: Back in the hills again
Bikes: 88 Bridgestone T700
Posts: 1,004
On the DuPont teflon. Been using it on my motorcycles for a couple years with excellent reults. Clean and cheap a combination that can't be beat. One of the bikes makes a 120HP/70FT-LBS and I'm getting about 30K miles from a chain. Been using it on the bicycle as well. I don't make near that much power but it works well there too.
XR2 is offline   Reply With Quote
Old 07-23-11, 12:39 PM   #19
PatW
Senior Member
 
Join Date: Nov 2009
Bikes:
Posts: 313
I find that a worn chain ring gets sharper and sharper. When, you are likely to get cut putting a chain on it, it is probably time to replace it. A chain ring usually lasts over 20,000 miles. A way to get more wear out of your rear cluster and chain ring is to change your chain before it gets overly worn. You can buy a little gauge for about $10 at your LBS that makes measuring chain wear on the chain very easy.
PatW is offline   Reply With Quote
Old 07-23-11, 03:52 PM   #20
TomD77
Senior Member
Thread Starter
 
TomD77's Avatar
 
Join Date: Jul 2010
Location: Florida Panhandle
Bikes:
Posts: 572
My original concern was from ignorance, I thought that the teeth on my chain ring had worn so much that some of them were breaking off at the tips. Got a lot to learn, I guess. Went by the LBS this PM and took this picture of a brand new chain ring of the same type. Looked at several chain rings of different manufacturers and noticed that not all had the alternating tooth shapes.

TomD77 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 10:17 AM.