Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Dura Ace 7410 crankset and BB options

Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Dura Ace 7410 crankset and BB options

Old 10-19-18, 01:40 PM
  #1  
Senior Member
Thread Starter
 
squirtdad's Avatar
 
Join Date: Jul 2006
Location: San Jose (Willow Glen) Ca
Posts: 9,839

Bikes: Kirk Custom JK Special, '84 Team Miyata,(dura ace old school) 80?? SR Semi-Pro 600 Arabesque

Mentioned: 106 Post(s)
Tagged: 0 Thread(s)
Quoted: 2337 Post(s)
Liked 2,815 Times in 1,537 Posts
Dura Ace 7410 crankset and BB options

As usual, I get a new to me bike and drive my self crazy with parts and options for my vision on how to build it.

I am looking at 7410 cranks, which as I understand take a 103 spindle length be caused of the low Q factor.

Has any one use other BB alternatives in 103 like the IRD or SKF?

or gone ahead and used a 107 length.

this is going on an 84 team Miyata. it has 7200 EX front and rear derailers and don't plan on changing those out.. The only reason I am changing the crankout is that the current one Dura Ace 7110 is 165 and I just can't make that size work and finding a replacement is basically impossible

thanks
__________________
Life is too short not to ride the best bike you have, as much as you can
(looking for Torpado Super light frame/fork or for Raleigh International frame fork 58cm)



squirtdad is offline  
Old 10-19-18, 02:21 PM
  #2  
Keener splendor
 
TimmyT's Avatar
 
Join Date: Jun 2011
Location: New York, NY
Posts: 2,164

Bikes: Black Mountain Cycles Road and canti MX, Cannondale CAAD12, Bob Jackson Vigorelli

Mentioned: 53 Post(s)
Tagged: 0 Thread(s)
Quoted: 297 Post(s)
Liked 80 Times in 51 Posts
Are you looking for that bottom bracket or just information on an alternative?
I have a spare 7410 English thread bb that I don't need. PM me, if this is what you are after.
TimmyT is offline  
Old 10-19-18, 03:26 PM
  #3  
Cat 6
 
Ex Pres's Avatar
 
Join Date: Dec 2007
Location: Mountain Brook, AL
Posts: 7,482
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 500 Post(s)
Liked 183 Times in 118 Posts
Do you have a "newer" Campy Record or Chorus 102 to test the crank on? Just to see if it doesn't bottom out on the cups even before trying in the frame?
Ex Pres is offline  
Old 10-19-18, 03:52 PM
  #4  
aka: Dr. Cannondale
 
rccardr's Avatar
 
Join Date: Jul 2009
Posts: 7,729
Mentioned: 234 Post(s)
Tagged: 0 Thread(s)
Quoted: 2152 Post(s)
Liked 3,401 Times in 1,203 Posts
The correct DA 103mm bottom bracket in the correct thread (timmyT's?) is your best bet.
Token and IRD both sell a 103mm BB, lowest cost for them seems to be Amazon/eBay.

However, a 7400/01/02 crankset will probably be less expensive and easier to find a bottom bracket for. And it will visually mate better with 7200 stuff.
__________________
Hard at work in the Secret Underground Laboratory...
rccardr is offline  
Old 10-20-18, 12:00 AM
  #5  
Senior Member
 
Eric S.'s Avatar
 
Join Date: Aug 2005
Location: Las Vegas, NV
Posts: 932

Bikes: '04 LeMond Buenos Aires, '82 Bianchi Nuova Racing, De Rosa SLX, Bridgestone MB-1, Guerciotti TSX, Torpado Aelle, LeMond Tourmalet 853, Bridgestone Radac

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 101 Post(s)
Liked 46 Times in 36 Posts
I haven't thought about it in years, but I first bought a Dura Ace 7410 crankset in 1996 and I could swear I paired it with a 107mm BB. If I'm correct it is the only BB it has ever known.
Eric S. is offline  
Old 10-21-18, 11:07 AM
  #6  
Ride, Wrench, Swap, Race
 
dddd's Avatar
 
Join Date: Jan 2010
Location: Northern California
Posts: 9,193

Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.

Mentioned: 132 Post(s)
Tagged: 0 Thread(s)
Quoted: 1565 Post(s)
Liked 1,294 Times in 864 Posts
The aero-inspired Dura-Ace (7???) AX crankset did indeed use a 108mm bottom bracket spindle, as did the later boutique Sante 7000 crankset.

107mm worked perfectly with those for me, but for the 7410 model it should be 103mm with JIS taper.

Tange also has offered a 103mm JIS bottom bracket known to be of very high quality, but a genuine 7410 bottom bracket isn't very hard to find these days.

Few things annoy me more than a too-long bottom bracket spindle, which tends to force an earlier shift off of the large chainring to avoid excessive chainline angle.
Crappy bikes made for beginners used to consistently come with long bottom bracket spindles, intended to center the freewheel with the small chainring's chainline.

Last edited by dddd; 10-21-18 at 11:11 AM.
dddd is offline  
Old 10-21-18, 11:45 AM
  #7  
Senior Member
 
Join Date: Dec 2014
Posts: 546

Bikes: colnago titanio oval master, pinarello treviso es, centurion prestige, tomac ti 26er, lemond buenos aires, mbk 753, vitus 992 and zx1, rocky mountain hammer disc,bd century titanium, specialized venge expert

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 130 Post(s)
Liked 39 Times in 20 Posts
Merlin has a miche 102 jis bottom bracket for dirt cheap right now...also a titanium Italian threaded miche version for around $30.
dunrobin is offline  
Old 10-24-18, 01:16 PM
  #8  
gek
Newbie
 
Join Date: Oct 2018
Location: Hillsborough, NJ
Posts: 2

Bikes: Rossin Ghibli, Gios Compact Pro

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I also have the DA 7410 crank. Looks like the spindle on the BB-7410 is 103 mm JIS low profile. I ordered OMNI Racer Square Taper Cromo Steel Bottom Bracket JIS 2: 70x103mm- ITALIAN (for my Gios frame) from e-bay. Hopefully I can use standard JIS instead of JIS low profile. Not sure how it will fit in the crank or affect the chain line.

Don't think Campy Chorus 102 mm BB is an option as it's ISO.
gek is offline  
Old 10-24-18, 01:28 PM
  #9  
Senior Member
Thread Starter
 
squirtdad's Avatar
 
Join Date: Jul 2006
Location: San Jose (Willow Glen) Ca
Posts: 9,839

Bikes: Kirk Custom JK Special, '84 Team Miyata,(dura ace old school) 80?? SR Semi-Pro 600 Arabesque

Mentioned: 106 Post(s)
Tagged: 0 Thread(s)
Quoted: 2337 Post(s)
Liked 2,815 Times in 1,537 Posts
Originally Posted by gek
I also have the DA 7410 crank. Looks like the spindle on the BB-7410 is 103 mm JIS low profile. I ordered OMNI Racer Square Taper Cromo Steel Bottom Bracket JIS 2: 70x103mm- ITALIAN (for my Gios frame) from e-bay. Hopefully I can use standard JIS instead of JIS low profile. Not sure how it will fit in the crank or affect the chain line.

Don't think Campy Chorus 102 mm BB is an option as it's ISO.
My understanding is that 7410 is JIS. I think low profile more refers to the crank Q factor. VeloBase.com - Component: Shimano BB-7410, Dura Ace 7410

also @TimmyT has a 7410 BB he might part with
__________________
Life is too short not to ride the best bike you have, as much as you can
(looking for Torpado Super light frame/fork or for Raleigh International frame fork 58cm)



squirtdad is offline  
Old 10-24-18, 02:35 PM
  #10  
Keener splendor
 
TimmyT's Avatar
 
Join Date: Jun 2011
Location: New York, NY
Posts: 2,164

Bikes: Black Mountain Cycles Road and canti MX, Cannondale CAAD12, Bob Jackson Vigorelli

Mentioned: 53 Post(s)
Tagged: 0 Thread(s)
Quoted: 297 Post(s)
Liked 80 Times in 51 Posts
Originally Posted by squirtdad
My understanding is that 7410 is JIS. I think low profile more refers to the crank Q factor. VeloBase.com - Component: Shimano BB-7410, Dura Ace 7410

also @TimmyT has a 7410 BB he might part with
I think the Gios is going to be Italian thread. If it is English/British threaded, then I do have a bb that I could sell.
TimmyT is offline  
Old 10-29-18, 10:07 PM
  #11  
Banned.
 
Join Date: Dec 2007
Posts: 27,199
Mentioned: 34 Post(s)
Tagged: 1 Thread(s)
Quoted: 378 Post(s)
Liked 1,409 Times in 909 Posts
Originally Posted by gek
I also have the DA 7410 crank. Looks like the spindle on the BB-7410 is 103 mm JIS low profile. I ordered OMNI Racer Square Taper Cromo Steel Bottom Bracket JIS 2: 70x103mm- ITALIAN (for my Gios frame) from e-bay. Hopefully I can use standard JIS instead of JIS low profile. Not sure how it will fit in the crank or affect the chain line.
I'm hoping it works for you. Omni makes some light bottom brackets, in square taper.
RobbieTunes is offline  
Old 10-29-18, 10:50 PM
  #12  
Ride, Wrench, Swap, Race
 
dddd's Avatar
 
Join Date: Jan 2010
Location: Northern California
Posts: 9,193

Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.

Mentioned: 132 Post(s)
Tagged: 0 Thread(s)
Quoted: 1565 Post(s)
Liked 1,294 Times in 864 Posts
"Low profile" isn't about Q-factor (pedal stance) at all. It refers to the "hub" of the crankarm having been moved (offset) inward, allowing use with a much shorter bottom bracket spindle, thus saving weight and increasing stiffness while improving clearance to the rider's shoe and ankle.

I hope this is helpful.
dddd is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
slebo3213
Classic & Vintage
2
04-28-16 05:52 PM
limabeanjr
Bicycle Mechanics
1
10-23-15 08:50 PM
zeego
Bicycle Mechanics
2
08-13-14 10:55 PM
Ils
Singlespeed & Fixed Gear
7
11-11-11 08:38 PM
rhodeshg
Road Cycling
7
11-03-11 10:12 AM

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.