Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the Newton-Rider International Giveaway for a Foldable Bicycle Helmet


Italian thread octalink BB?
#1
I have a Golden Sports ZebraKenko Thunder bike from the late 70s that I'm trying to upgrade to modern parts. According to Sheldon Brown's guide, the BB is italian thread (70mm). After some research, I bought the shimano BB-5500, 70mm, which claims to be Italian thread, but alas, it won't thread correctly to my BB.

Are there any Octalink V1 shimano BB with italian threads or am I stuck with squared BB?

Attached is a picture of the etchings on my BB.
From what I can read:
top line: 77 J
bottom line: D7x4202

Should I just take my old one to the local bike shop to see if they have what I'm looking for?

Thanks for any help.
  Reply
#2
I found two lower priced bottom brackets on Amazon that may work: 113mm and 118mm.
  Reply
#3
UPDATE: After more research, it seems that the BB is not Italian threading after all, even though it's 70mm. I've done some research and looks like some older Japanese bikes have 70mm english threaded BBs, and my frame is one of them! And people have reportedly used 68mm BB on them without any problems.

I went out and bought an english thread BB, and was able to mount it fine.
  Reply
#4
make sure to post a picture of that bike when you're finished.
  Reply
#5
(01-08-2010, 05:26 PM)Jordan300 Wrote:  make sure to post a picture of that bike when you're finished.

I didn't finish yet, but here's pic of what I finished so far.

1) Cold set frame from 120cm to 130cm (to fit new wheelset)
2) installed 68mmx109.5mm BB on 70mm BB
3) installed shimano 105 double crankset
4) installed modern wheelset from my specialized allez (which I upgraded).

TODO:
1) install modern brakes (requires drilling into steel frame)
2) install derailleurs (front and back)
3) install barcon shifters
4) install chains
5) put old seat back (one component I'm not upgrading)
6) install pedals
  Reply
#6
Hey nice looking project... love the color. Nifty idea having a radial lace on the front, can't wait to see it completed!
  Reply
#7
That looks sweet. Great job
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
10,239
12-02-2013, 09:48 PM
Last Post: 1FJEF
 
5,206
08-11-2013, 08:22 PM
Last Post: 1FJEF
 
7,125
06-26-2012, 11:20 AM
Last Post: xerxes
 
2,820
10-23-2011, 01:44 PM
Last Post: nfmisso
 
6,443
05-02-2011, 05:16 PM
Last Post: JohnV

Forum Jump:

[-]
10 Latest Posts
Can someone identify this Bottom Bracket...
01-20-2021 02:24 PM
11-42 cogs on Road bike?
01-20-2021 02:04 AM
NewBikeShopper (intro & opinion request)
01-20-2021 01:57 AM
1983 Trek 720
01-20-2021 12:23 AM
brakes
01-19-2021 11:25 PM
Road bike brakes upgrades
01-19-2021 01:41 PM
Do you wave to other cyclists?
01-18-2021 02:48 PM
Newton-Rider, a helmet like no other
01-15-2021 05:01 PM
Colnago R41 Handlebar
01-14-2021 10:24 PM
How much do you bike per year?
01-14-2021 04:50 PM

[-]
Top 5 Posters This Month
no avatar 1. Criminal
19 posts
no avatar 2. RollOn
6 posts
no avatar 3. Henry_G
5 posts
no avatar 4. Yevhen
5 posts
no avatar 5. Zviedrs
4 posts