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Technical & Reference Section => Tech and Restoration => Topic started by: billycrabtreeomer on October 13, 2009, 07:39 PM

Title: OS bike modern crank help please
Post by: billycrabtreeomer on October 13, 2009, 07:39 PM
Is it possible to fit a modern crank to my os 84 quad & tange dontknow F & F. I need to up grade for some modern light wieght ones.

This is so i can make my old school bike as light and strong as poss for racing on.

Has anyone done this and can you please pass me on your tips.

Both of these bikes have been raced of late, i do swop parts over 12other.
(http://www.radbmx.co.uk/archive/albums/nn255/crabtree1969/Quad.jpg)

(http://www.radbmx.co.uk/archive/albums/nn255/crabtree1969/Tange.jpg)
Title: Re: OS bike modern crank help please
Post by: HEYWOOD BMX on October 13, 2009, 07:44 PM
 :) OS bikes have a USA bottom bracket shell.New school cranks have either a 19MM or 22MM spindle,so all you need to do is buy a matching size USA bottom bracket bearing set-all decent BMX shops will have them.
Title: Re: OS bike modern crank help please
Post by: magna13 on October 13, 2009, 07:47 PM
Redline Twin Pinch Flights. :)

Old School design with New School quality's :daumenhoch:
Title: Re: OS bike modern crank help please
Post by: billycrabtreeomer on October 13, 2009, 09:45 PM
:) OS bikes have a USA bottom bracket shell.New school cranks have either a 19MM or 22MM spindle,so all you need to do is buy a matching size USA bottom bracket bearing set-all decent BMX shops will have them.

niceone didnt know that shall get hunting, many thanks HEYWOODBMX
Title: Re: OS bike modern crank help please
Post by: billycrabtreeomer on October 13, 2009, 09:55 PM


Old School design with New School quality's Yes! thats the way for me. was thinking of alloy cranks.
Title: Re: OS bike modern crank help please
Post by: HEYWOOD BMX on October 13, 2009, 10:29 PM
  :) If you`re after alloy,Primo Hollowbites are pretty good (22 mm) or Cyclesport have their own brand Prolite Stealth cranks for a bit less.

http://www.cyclesportuk.co.uk/product_info.php?cPath=31&products_id=1709
Title: Re: OS bike modern crank help please
Post by: billstup on October 13, 2009, 11:33 PM
Billy ask Stodgy in the Radshop about twin pinch Redline Flight cranks, he had a good deal on them a little while ago, and you need cromo cranks not alloy  :daumenhoch:
Title: Re: OS bike modern crank help please
Post by: billycrabtreeomer on October 14, 2009, 12:00 AM

     If you`re after alloy,Primo Hollowbites are pretty good (22 mm) or Cyclesport have their own brand Prolite Stealth cranks for a bit less.
     

     Nice link , cheers :)
Title: Re: OS bike modern crank help please
Post by: Faze7-Ade on October 14, 2009, 05:53 AM
Redline twin pinch flights fit a quad with a bit of fettling on the chain alignment.


Check out this link - this is my quad with those cranks fitted.

http://www.radbmx.co.uk/forum/index.php'topic=75301.0

Title: Re: OS bike modern crank help please
Post by: billycrabtreeomer on October 14, 2009, 10:01 AM
Billy ask Stodgy in the Radshop about twin pinch Redline Flight cranks, he had a good deal on them a little while ago, and you need cromo cranks not alloy  :daumenhoch:

cheers biily ,i shall ave a look mate
Title: Re: OS bike modern crank help please
Post by: SaMAlex on October 14, 2009, 10:10 AM

This is so i can make my old school bike as light and strong as poss for racing on.


Most 3 piece cranks will be heavier than a one piece crank. They will be MUCH stonger, but heavier  :daumenhoch:
Title: Re: OS bike modern crank help please
Post by: billycrabtreeomer on October 14, 2009, 01:59 PM


   Most 3 piece cranks will be heavier than a one piece crank. They will be MUCH stonger, but heavier  :daumenhoch:

  Yes thats true just my hollow one piese are getting a hammering & didnt want a accident breaking them.

  cheers for advice thou
 
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