Sugino 75+IRO BB ?
07-02-08, 10:59 AM
#1
Newbie
Thread Starter
Join Date: Apr 2008
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Sugino 75+IRO BB ?
As the title says, has anyone tried running the IRO BB with Sugino 75's.
110mm-IRO-Sealed
109mm-75bb-loose
For ~$30.00 it seems like a good deal for a sealed bb that will fit the 75.
110mm-IRO-Sealed
109mm-75bb-loose
For ~$30.00 it seems like a good deal for a sealed bb that will fit the 75.
07-02-08, 02:35 PM
#3
fails just as quickly
Join Date: Apr 2006
Location: two miles behind
Posts: 522
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Sugino 75 cranks have an ISO taper (search for a number of redundant threads on this topic).
Although the IRO BB is close enough in length, it is likely that the taper is JIS or something else entirely. There is much debate over whether you can mix taper specs, but you run the risk of damaging your cranks and rendering them useless (search for a number of redundant threads on the taper mixing debate). Also, different taper specs will likely position the chainline differently, meaning that, despite a similar length spindle, the two bottom brackets may interface at a different distance with the same crank.
I would say that it is probably possible, but not something that I would recommend.
Although the IRO BB is close enough in length, it is likely that the taper is JIS or something else entirely. There is much debate over whether you can mix taper specs, but you run the risk of damaging your cranks and rendering them useless (search for a number of redundant threads on the taper mixing debate). Also, different taper specs will likely position the chainline differently, meaning that, despite a similar length spindle, the two bottom brackets may interface at a different distance with the same crank.
I would say that it is probably possible, but not something that I would recommend.
07-02-08, 05:04 PM
#5
Senior Member
Join Date: Oct 2006
Location: Minneapolis!
Posts: 189
Bikes: 2005 Surly Steamroller, 2003 Surly Pacer, 2009 Surly LHT, 2010 Surly LHT, 2007 Surly CrossCheck, 1988 Schwinn Prologue
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
+1 Or a Phil. Why put a $200 crank on a $30 bb. If you must go cheap then your best option is the Miche Primato which is ISO and adjustable to get your chainline just right. And it's around $30(or less).
07-02-08, 06:06 PM
#6
Senior Member
Join Date: Feb 2007
Location: San Francisco
Posts: 290
Bikes: Univega Gran Premio, Custom MTB/SS/Commuter, Vintage Miele Fixie under construction
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I have the IRO bb on my IRO, and Im running a set of Dura Ace cranks, which work with the same size taper and length BB as the Suginos. Its a perfect fit, not as nice as the Sugino BB I have on my other bike, but perfect for the IRO as its my basket/beater bike. I am going to get the same BB for my other bike to use with the Suginos once the I kill the Sugino BB I have on there now. The non drive side crank arm is out a little bit further than the drive side, but I get perfect chainline with a Phil rear hub.
I say get one, works great, its sealed, and is super cheap (I got mine at Montano Velo for about 15 bucks)
I say get one, works great, its sealed, and is super cheap (I got mine at Montano Velo for about 15 bucks)
