Technical & Reference Section > Tech and Restoration

Redline flight crank BB advice needed please!

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factory pilot:
I know the more technically minded Radsters may scorn my limited knowledge
(yes I know I'm a sad loser  :loser:) but can anyone confirm for me that the repop Profile bottom brackets will fit/work with my 80's flight crank.....I'm guessing they do but don't want to fork out the pennies if I'm wrong on this one.

I've seen these on US ebay (Alans had some but have sold out :( )
http://www.ebay.co.uk/itm/231109779392'ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Many thanks in advance to the more technically minded of you out there... :4_17_5:

cheers Ant

Glynnyboy:
Cant remember what the answer was in the past over weather the new spindles will fit the old crank arms or not.
If they do then yes you can with one of the new spindles.
Those bb's won't work with the dimpled threaded spindles that the 401's originally came with though.
For the dimpled one's your looking at Hadley, suntour or the redline techmatic. (Joe from hong kong does the repro techmatics in anodized colours though which look pretty good)

southern andy:
Like Glynn said, it pretty much depends on your spindle.

If it has a thread on the spindle then no, if it doesn't and there are 6 splines either end then yes.

Piccy of your spindle ????

Spen69:
Andy and Glynn are of course correct mate :coolsmiley:

But as I was confusing folk the other day, don't forget your old US made cranks will be imperial and the new spindle metric, so you need a new BB to go with the spindle as the 0.05mm will make a difference in the spindle diameter and will not fit.

Post a pic up of what you have and we can give you a definite answer :daumenhoch:

factory pilot:
Hi guys I'm without means of taking a photo at the mo' so I'll do my best to describe what I'm looking at.......


the spindle has 6 splines on either side
the centre of the spindle is smooth with two small sections of thread at either side just before the ends where the splines are....


just found this exact picture......

http://i73.photobucket.com/albums/i236/citypets/48_1_b.jpg



that is the exact flight set, spindle  and bottom bracket I have ...I think it's a 1981 set?

I hope this helps.....I'm now terribly confused as on looking at it , it's obviously not a sealed bb at all....?

If I can get the profile to work it will look the mutts!
Otherwise is this loose ball set up acceptable if I cleaned it up for a 82/83 build ?

many thanks again....this part of a build always gives me headaches! :crazy2:

cheers Ant.....very confused now :uglystupid2:

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