Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Tapping BB for Italian thread cost

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Tapping BB for Italian thread cost

Old 05-10-21, 12:30 PM
  #1  
Lbxpdx
Senior Member
Thread Starter
 
Join Date: Oct 2020
Location: Portland
Posts: 97
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 47 Post(s)
Likes: 0
Liked 30 Times in 17 Posts
Tapping BB for Italian thread cost

Well, my BB for my 1991 Trek is geeked on the drive side. What is fair market cost for having the threads retapped? Does $60 sound reasonable?

Also, if I have my BB tapped for Italian, can I reuse my existing spindle and Shimano/Sugino cups?
Lbxpdx is offline  
Old 05-10-21, 12:36 PM
  #2  
100bikes
Industry guy
 
Join Date: Nov 2007
Location: Minnesota
Posts: 284

Bikes: To many to name - I ride a custom built steel frame.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 84 Post(s)
Liked 39 Times in 27 Posts
$60 would be a very fair price.
You are paying for not only time, but expertise and use of some pretty expensive tools.
As long as the wall thickness of the cups is the same, the spindle will work.
rusty
100bikes is offline  
Likes For 100bikes:
Old 05-10-21, 01:03 PM
  #3  
Crankycrank
Senior Member
 
Join Date: Jan 2009
Location: San Diego, CA
Posts: 2,170
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 401 Post(s)
Liked 273 Times in 210 Posts
You could also try one of these. Has JIS taper and various spindle lengths. Velo Orange Grand Cru Threadless Bottom Bracket (velo-orange.com)
Crankycrank is offline  
Old 05-10-21, 01:15 PM
  #4  
3alarmer
Friendship is Magic
 
3alarmer's Avatar
 
Join Date: Nov 2010
Location: The Big Tomato
Posts: 19,588

Bikes: old ones

Mentioned: 279 Post(s)
Tagged: 0 Thread(s)
Quoted: 21048 Post(s)
Liked 3,974 Times in 2,911 Posts
Originally Posted by Lbxpdx View Post
Well, my BB for my 1991 Trek is geeked on the drive side. What is fair market cost for having the threads retapped? Does $60 sound reasonable?

Also, if I have my BB tapped for Italian, can I reuse my existing spindle and Shimano/Sugino cups?
...I'm not sure if you have much experience with Italian threading in a BB. If this were me, and I was going to do this rather than go threadless, I would just order up a new sealed unit BB spindle in the correct length and install it at this time (after the rethreading). The reasons are that the drive side on an Italian BB has an unfortunate tendency to back out under use. This tendency is much reduced with a sealed unit BB.

I'm generally of the opinion that loose spindles are, in the majority, of higher quality than most available sealed unit BB units, so try to order one of the higher quality sealed ones.
3alarmer is offline  
Old 05-10-21, 03:40 PM
  #5  
'02 nrs
royaloaker
 
'02 nrs's Avatar
 
Join Date: Jan 2010
Location: se MIch.
Posts: 464

Bikes: 1938 claud butler,1983 Basso,teledyne titan,teocali super,nrs,1993 stumpjumper fsr,Paramountain,Paramount Buell,4 banger,Zaskar LE,Colnago Master Ibex MTB,1987ish,.etc....

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 157 Post(s)
Liked 188 Times in 112 Posts
Italian threading/

REI locally did mine for $50. as a member,total. tried a bike shop & they wanted $200.
'02 nrs is offline  
Old 05-10-21, 03:57 PM
  #6  
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Posts: 22,511

Bikes: Several, mostly not name brands.

Mentioned: 133 Post(s)
Tagged: 0 Thread(s)
Quoted: 2560 Post(s)
Liked 1,179 Times in 752 Posts
Originally Posted by Lbxpdx View Post
Well, my BB for my 1991 Trek is geeked on the drive side. What is fair market cost for having the threads retapped? Does $60 sound reasonable?
$60 sounds reasonable to me.

Also, if I have my BB tapped for Italian, can I reuse my existing spindle and Shimano/Sugino cups?
Italian thread is wider than English by 1mm, so your English thread cups won't work. If the spindle is in reasonable condition, that could be used with a set of Italian thread cups of similar thickness.

You might also consider a threadless cartridge, such as offered by Velo-Orange and others. Total cost might work out to be less than retapping and new bottom bracket parts.
JohnDThompson is offline  
Old 05-10-21, 07:36 PM
  #7  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 14,918

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2924 Post(s)
Liked 1,191 Times in 840 Posts
Back in the day Bicycle Research (Francis B is being channeled here) made a reamer for their BB taps holders to remove just the right amount of Eng thread and prep the shell's ID for the Itl tap to cut new threads. Remember that the Itl threads are a RH direction and the Eng ones are LH so trusting the old mangled threads to catch and guide the new bigger ones might be overly hopeful. Of course the skill/luck of the person doing this will count for a lot more then any words we here can write.

Before I would consider doing a non reversible frame "repair" (and only called repair if it worked out OK) I would look at the other options. Unthreaded BBs being one mentioned and a good method. Another is if there's enough RH side shell threads to allow a Phil BB ring to be Locktited in place then use that BB (and a possible life time solution). Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.