Should the Teeth on your Chain Wheel be Sharp?
07-08-07 | 06:10 AM
#1
Thread Starter
Senior Member
Joined: Dec 2006
Posts: 100
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From: Philadelphia
Should the Teeth on your Chain Wheel be Sharp?
Hi guys,
Got a new bike not too long ago. When I had about 50 miles on it, I examined the chain rings. I noticed that the teeth are not uniformly sharp and triangular. Instead, many are dull, of slightly different sizes, etc. However, they are not bent.
My question is this: are the teeth on chain rings supposed to be nice and sharp triangles, of a uniform size, or is it O.K. that they look like mine do (dull, different heights, etc.)?
Thanks!
Got a new bike not too long ago. When I had about 50 miles on it, I examined the chain rings. I noticed that the teeth are not uniformly sharp and triangular. Instead, many are dull, of slightly different sizes, etc. However, they are not bent.
My question is this: are the teeth on chain rings supposed to be nice and sharp triangles, of a uniform size, or is it O.K. that they look like mine do (dull, different heights, etc.)?
Thanks!
07-08-07 | 06:38 AM
#2
Conservative Hippie
Joined: Mar 2005
Posts: 4,268
Likes: 0
From: Wakulla Co. FL
Yes, they are like that to aid shifting. If your bike only has 50 miles on it, what you are looking at are brand new chainrings. With that few miles there should be no discernible wear. You might want to check them again at 5000 miles.
07-08-07 | 06:56 AM
#3
Videre non videri
Joined: Sep 2004
Posts: 3,208
Likes: 4
From: Gothenburg, Sweden
Bikes: 1 road bike (simple, light), 1 TT bike (could be more aero, could be lighter), 1 all-weather commuter and winter bike, 1 Monark 828E ergometer indoor bike
Take a look at this page, which explains it all:
https://sheldonbrown.com/gloss_ra-e.html#ramp
https://sheldonbrown.com/gloss_ra-e.html#ramp
07-08-07 | 10:01 AM
#5
In Real Life
Joined: Jan 2003
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From: Down under down under
Bikes: Lots
When they become sharp triangles ... that's a good sign it's time to replace them.
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07-08-07 | 11:45 AM
#6
cab horn
Joined: Jun 2004
Posts: 28,353
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From: Toronto
Bikes: 1987 Bianchi Campione
Originally Posted by chas0039
The last Shimano crank I installed for my brother actually had info printed right on the ring basically stating that the weird parts were normal. Little arrows pointed them out. They must have had a few people complain.
07-08-07 | 02:02 PM
#7
Originally Posted by chas0039
The last Shimano crank I installed for my brother actually had info printed right on the ring basically stating that the weird parts were normal. Little arrows pointed them out. They must have had a few people complain.
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