Ask Scrod
#2751
Thread Starter
Your cog is slipping.



Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
#2752
Thread Starter
Your cog is slipping.



Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
#2753
Scrod:
How often do you check your cog/lockring for tightness? I happened to be swapping out the axle and track nuts on my rear wheel (stripped one side by allowing my wife to convince me to pull a trailer on the Devil) when I noticed my lockring was loose. Nothing was stripped and the cog was still snug enough to be a non-issue. Should I be checking the lockring every ride?
Also, I keep my drive train immaculate (usually); there was a little buildup of road grim recently and I noticed that my cog was silent until I removed all the debris. Now its just audible and I have about 2 inches of play on the bottom side of my chain, so I don't believe its an overstretched issue. Does crap on the chain have a positive effect or is the affect something I'm not seeing (such as too much tension on the chain, which I immediately defended against)?
How often do you check your cog/lockring for tightness? I happened to be swapping out the axle and track nuts on my rear wheel (stripped one side by allowing my wife to convince me to pull a trailer on the Devil) when I noticed my lockring was loose. Nothing was stripped and the cog was still snug enough to be a non-issue. Should I be checking the lockring every ride?
Also, I keep my drive train immaculate (usually); there was a little buildup of road grim recently and I noticed that my cog was silent until I removed all the debris. Now its just audible and I have about 2 inches of play on the bottom side of my chain, so I don't believe its an overstretched issue. Does crap on the chain have a positive effect or is the affect something I'm not seeing (such as too much tension on the chain, which I immediately defended against)?
#2754
Thread Starter
Your cog is slipping.



Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
In all honestly, I very rarely check my cog and lockring because every single time I do, they're as tight as can be. In my experience, there's no need to constantly keep checking them if they're installed correctly and checked after the first ride to begin with (Hozan pliers FTW).
Chains that are a little gummed up are usually quieter than when they are clean/brand new.
Chains that are a little gummed up are usually quieter than when they are clean/brand new.
#2755
Scrod, what is the lube they put on new chains?
I recently picked up an izumi eco and I was surprised at how quiet it was right out of the box. It's a very sticky waxy compound they've used, which probably goes along the lines of 'gummed up' as you stated.
need me some of that.
I recently picked up an izumi eco and I was surprised at how quiet it was right out of the box. It's a very sticky waxy compound they've used, which probably goes along the lines of 'gummed up' as you stated.
need me some of that.
#2756
Thread Starter
Your cog is slipping.



Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
The "lube" that comes on most new chains is typically just to keep them from corroding inside the packaging in the event of them sitting around in a warehouse for too long. If a chain was packaged dry, it would most likely be covered with surface rust by the time it got to you. I've found that it's best to clean as much of that waxy stuff off a new chain right out of the box and reapply a good wet lube.
#2757
Senior Member
Joined: Apr 2010
Posts: 1,452
Likes: 12
From: Philadelphia
Bikes: Surly CreamRoller. 98 Giant Rincon. SE UVT
Quick question Scrod, when i'm looking at bikes and it says the bb drop some say 58 some say 50. What does that mean? How can I tell how many inches that is off the ground from those numbers?
#2758
that number is how many millimeters the center of the BB is lower than the center of the rear axle. The reason they use this number more often than BB height is because its the same no matter the wheel size. If you want to find BB height, take half of your wheel size, and subtract the BB drop, and that will give you the height of it off of the ground.
assuming your on 700's:
622mm/2 - 50mm= 261mm = 10.3inches
622mm/2 - 58mm= 253mm = 9.96inches
this i without a tire mounted.
/notscrod
assuming your on 700's:
622mm/2 - 50mm= 261mm = 10.3inches
622mm/2 - 58mm= 253mm = 9.96inches
this i without a tire mounted.
/notscrod
Last edited by Nagrom_; 02-15-12 at 05:37 PM.
#2759
Senior Member
Joined: Apr 2010
Posts: 1,452
Likes: 12
From: Philadelphia
Bikes: Surly CreamRoller. 98 Giant Rincon. SE UVT
that number is how many millimeters the center of the BB is lower than the center of the rear axle. The reason they use this number more often than BB height is because its the same no matter the wheel size. If you want to find BB height, take half of your wheel size, and subtract the BB drop, and that will give you the height of it off of the ground.
assuming your on 700's:
700mm/2 - 50mm= 300mm = 11.8inches
700mm/2 - 58mm= 292mm = 11.5inches
give or take a third of an inch.
/notscrod
assuming your on 700's:
700mm/2 - 50mm= 300mm = 11.8inches
700mm/2 - 58mm= 292mm = 11.5inches
give or take a third of an inch.
/notscrod
#2760
Thread Starter
Your cog is slipping.



Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
BB drop is the distance between the rear axle and the center of the BB, while BB height is the distance between the center of the BB and the ground.

By measuring the distance from the rear axle to the ground and doing some math, it shouldn't be too hard to figure out. Of course, there will be variances depending on what size tire you'll be using.
edit: I keep forgetting this is everyone else's thread. Sorry guys.

By measuring the distance from the rear axle to the ground and doing some math, it shouldn't be too hard to figure out. Of course, there will be variances depending on what size tire you'll be using.
edit: I keep forgetting this is everyone else's thread. Sorry guys.
#2762
The space coyote lied.



Joined: Sep 2008
Posts: 48,723
Likes: 10,982
From: dusk 'til dawn.
Bikes: everywhere
You have to be running pretty fat tires to have wheel+tire diameter of 700mm
#2763
thats only an inch and a half thick...
edited the math thought, thanks.
edited the math thought, thanks.
Last edited by Nagrom_; 02-15-12 at 05:38 PM.
#2764
Senior Member
Joined: Apr 2010
Posts: 1,452
Likes: 12
From: Philadelphia
Bikes: Surly CreamRoller. 98 Giant Rincon. SE UVT
#2765
Dear Scrod,
What is the significance of my avatar that you assigned me (if there is any). I can't figure out what the reference is. I have wondered/pondered this for quite some time.
What is the significance of my avatar that you assigned me (if there is any). I can't figure out what the reference is. I have wondered/pondered this for quite some time.
#2766
The space coyote lied.



Joined: Sep 2008
Posts: 48,723
Likes: 10,982
From: dusk 'til dawn.
Bikes: everywhere
I've often wondered why you have the Britney kid as yer avatar. On the edge of my seat waiting to hear what the corn bit's all about.
#2767
Member
Joined: Aug 2008
Posts: 37
Likes: 0
dear scrod,
how to remove freewheel with no notches without destroying and to modify for easier removal in future
how to remove freewheel with no notches without destroying and to modify for easier removal in future
#2769
Thread Starter
Your cog is slipping.



Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
To divulge the secret behind my method of assigning avatars may cause irreparable damage the universe. You wouldn't want that.
#2770
Thread Starter
Your cog is slipping.



Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
#2771
Member
Joined: Aug 2008
Posts: 37
Likes: 0
something like this. its on a friends pos bike that wanted to repack his hub and we ran into this. I suggested we could just destroy it and get it off and he could get a new one, but he's acting like a cheapskate and doesn't want to do that for his pos frankenstein bike, and I kinda understand really.
#2772
Senior Member
Joined: Mar 2010
Posts: 2,280
Likes: 2
From: Modesto, Ca
Bikes: klein quantum, litespeed tuscany, bianchi pista concept, centurion comp ta, centurion super le mans, traitor ringleader
scrod:
what are your favorite tire levers?
i had a few blue parks but the tips get rounded down and ive already broken two.
i have two pedros and they seem good but they are new.
yes i have numerous bikes and i change tires frequently. its the equivalent to playing dress up with dolls. :O
what are your favorite tire levers?
i had a few blue parks but the tips get rounded down and ive already broken two.
i have two pedros and they seem good but they are new.
yes i have numerous bikes and i change tires frequently. its the equivalent to playing dress up with dolls. :O
#2773
Thread Starter
Your cog is slipping.



Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
scrod:
what are your favorite tire levers?
i had a few blue parks but the tips get rounded down and ive already broken two.
i have two pedros and they seem good but they are new.
yes i have numerous bikes and i change tires frequently. its the equivalent to playing dress up with dolls. :O
what are your favorite tire levers?
i had a few blue parks but the tips get rounded down and ive already broken two.
i have two pedros and they seem good but they are new.
yes i have numerous bikes and i change tires frequently. its the equivalent to playing dress up with dolls. :O
#2774
Thread Starter
Your cog is slipping.



Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
something like this. its on a friends pos bike that wanted to repack his hub and we ran into this. I suggested we could just destroy it and get it off and he could get a new one, but he's acting like a cheapskate and doesn't want to do that for his pos frankenstein bike, and I kinda understand really.
#2775
Member
Joined: Aug 2008
Posts: 37
Likes: 0
I'm pretty sure what you linked to is for the type of freewheel pictured below. the freewheel in question (like pictured above) has no notches at all. thanks though





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