Dura ace/ EAI difference?
02-06-06 | 11:25 PM
#1
Thread Starter
J.A.M
Joined: Oct 2004
Posts: 1,230
Likes: 1
From: Monterey, CA
Bikes: Pista
Dura ace/ EAI difference?
I have a 15t dura ace cog, 16t EAI cog, and 18t phil wood cog here in front of me.
I have only ridden the EAI and Phil and am impressed but hereis the question....
Is there a distinguishable difference between the dura ace and EAI cog. In race situations mainly. I am about to get a 14t and cant tell what the extra 10 bucks is going for on the EAI. Finish is different but they both feel solid. granted i havnt ridden the DA yet.
chime in...
I have only ridden the EAI and Phil and am impressed but hereis the question....
Is there a distinguishable difference between the dura ace and EAI cog. In race situations mainly. I am about to get a 14t and cant tell what the extra 10 bucks is going for on the EAI. Finish is different but they both feel solid. granted i havnt ridden the DA yet.
chime in...
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The Bianchi That Could
The Bianchi That Could
02-06-06 | 11:47 PM
#2
meet the mets
Joined: Jun 2005
Posts: 1,555
Likes: 0
From: Bucktown, Chicago
Bikes: Raleigh conversion (hours spent making it look like a Pista); Porter Track, Samson Track, Leto Roadie.
The heat treating that EAI cogs go through CAN make them brittle. I've heard of two different EAI cogs snapping off teeth under high-torque situations. Never heard of it with DA.
I mostly ride DA cogs and love 'em.
I mostly ride DA cogs and love 'em.
02-07-06 | 01:30 AM
#4
Thread Starter
J.A.M
Joined: Oct 2004
Posts: 1,230
Likes: 1
From: Monterey, CA
Bikes: Pista
good news....
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The Bianchi That Could
The Bianchi That Could
02-07-06 | 09:40 AM
#6
King Among Runaways
Joined: Mar 2005
Posts: 4,215
Likes: 1
From: MKE
Bikes: 2004 Bianchi Pista, Cannondale Track, Soma Pake, Schwinn Breeze
DA come in 17t.
I've got one on order right now.
Although I am having no luck finding one anywhere online.
I think my LBS might have ordered me something that doesn't exist.
Crap.
I've got one on order right now.
Although I am having no luck finding one anywhere online.
I think my LBS might have ordered me something that doesn't exist.
Crap.
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"I owe everyone an apology" - hyperrevue
"I owe everyone an apology" - hyperrevue
02-07-06 | 09:45 AM
#7
meet the mets
Joined: Jun 2005
Posts: 1,555
Likes: 0
From: Bucktown, Chicago
Bikes: Raleigh conversion (hours spent making it look like a Pista); Porter Track, Samson Track, Leto Roadie.
Originally Posted by hyperRevue
DA come in 17t.
I've got one on order right now.
Although I am having no luck finding one anywhere online.
I think my LBS might have ordered me something that doesn't exist.
Crap.
I've got one on order right now.
Although I am having no luck finding one anywhere online.
I think my LBS might have ordered me something that doesn't exist.
Crap.
02-07-06 | 09:47 AM
#8
Senior Member
Joined: Oct 2004
Posts: 1,588
Likes: 0
From: st. pete/tampa, FL
Originally Posted by hyperRevue
DA come in 17t.
I've got one on order right now.
Although I am having no luck finding one anywhere online.
I think my LBS might have ordered me something that doesn't exist.
Crap.
I've got one on order right now.
Although I am having no luck finding one anywhere online.
I think my LBS might have ordered me something that doesn't exist.
Crap.
02-07-06 | 10:13 AM
#10
meet the mets
Joined: Jun 2005
Posts: 1,555
Likes: 0
From: Bucktown, Chicago
Bikes: Raleigh conversion (hours spent making it look like a Pista); Porter Track, Samson Track, Leto Roadie.
There's always the Phil...
02-07-06 | 10:18 AM
#11
King Among Runaways
Joined: Mar 2005
Posts: 4,215
Likes: 1
From: MKE
Bikes: 2004 Bianchi Pista, Cannondale Track, Soma Pake, Schwinn Breeze
I know...I know...
I guess after dropping $$$ on 75s and a Phil Wood BB, an extra $20 wont be a big deal.
I guess after dropping $$$ on 75s and a Phil Wood BB, an extra $20 wont be a big deal.
__________________
"I owe everyone an apology" - hyperrevue
"I owe everyone an apology" - hyperrevue
02-07-06 | 10:30 AM
#12
meet the mets
Joined: Jun 2005
Posts: 1,555
Likes: 0
From: Bucktown, Chicago
Bikes: Raleigh conversion (hours spent making it look like a Pista); Porter Track, Samson Track, Leto Roadie.
Phil donated a 17t cog as swag for the Poker Ride in January. I spent a day rolling it through my knuckles...man, that's a lotta cog, super nice.
02-07-06 | 11:08 AM
#14
King of the Hipsters
Joined: Jan 2005
Posts: 2,128
Likes: 2
From: Bend, Oregon
Bikes: Realm Cycles Custom
I like both EAI and DA.
The biggest difference?
Put them both on a table with the teeth sorta touching each other.
Notice the different heights of the teeth from the table top.
They have slightly different flange dimensions. in terms of standoff from the hub.
I have heard/read that one should pick one cog manufacturer or the other, and not mix them on the hub, because their threads differ slightly from each other and switching back and forth shortens the life of the hub's threads.
On my Bianchi Pista, with the stock Sugino RD crank, the EAI cog, with the flange against the hub, gives me the best chainline.
The biggest difference?
Put them both on a table with the teeth sorta touching each other.
Notice the different heights of the teeth from the table top.
They have slightly different flange dimensions. in terms of standoff from the hub.
I have heard/read that one should pick one cog manufacturer or the other, and not mix them on the hub, because their threads differ slightly from each other and switching back and forth shortens the life of the hub's threads.
On my Bianchi Pista, with the stock Sugino RD crank, the EAI cog, with the flange against the hub, gives me the best chainline.
02-07-06 | 11:11 AM
#15
Back to being a Clyde....
Joined: Oct 2004
Posts: 1,544
Likes: 0
From: Santa Clara
Bikes: Giant OCR1(specialized carbon seatpost,Terry Fly sadle, Syntace C2): Leader TT frame, Easton EC70fork, Aerolite bars, nashbar bullhorn, Titan Wheels: Fuji Track Pro(2003)
The thread issue that you are talking about is mixing between ISO, British and Italian threading. If you stick with one threading, even between brands, you should be fine...
Originally Posted by Baxtefer
Type Thread Equivalent
I.S.O. 1.375" x 24 tpi 34.92 x 1.048 mm
British 1.370" x 24 tpi 34.80 x 1.058 mm
French 34.7 x 1 mm 1.366" x 25.4 tpi
Italian 35 mm x 24 tpi 1.378" x 1.058 mm
and
ISO, English and Italian are all semi-interchangeable, but it you shouldn't go back and forth between different types of freewheels on the same hub repeatedly
I.S.O. 1.375" x 24 tpi 34.92 x 1.048 mm
British 1.370" x 24 tpi 34.80 x 1.058 mm
French 34.7 x 1 mm 1.366" x 25.4 tpi
Italian 35 mm x 24 tpi 1.378" x 1.058 mm
and
ISO, English and Italian are all semi-interchangeable, but it you shouldn't go back and forth between different types of freewheels on the same hub repeatedly
Last edited by ZappCatt; 02-07-06 at 11:17 AM.
