MY "TEN SPEEDS"

 

 

MY "TEN SPEEDS"

 

SITE INDEX   FINDING   BICYCLES   WORK SHOP   TRADING   WHAT'S NEW?

 

MY "TEN SPEEDS"  

FRAME CAVITY - INTRO

SEAT TUBE CAVITY

SEAT TUBE CAVITY PREP

SEAT POST LUG REPAIR

BB CAVITY PREP

 

 

 

 

FRAME CAVITY PREPARATION - INTRODUCTION

Basically, any vintage road bicycle has three frame cavities that need to be addressed when preparing a frame set.  Those three cavities include the bottom bracket housing, the seat tube and head tube.  Each of these cavities can become either damaged and/or contaminated.  Damage is usually a result of uninformed maintenance while contamination is a product of water or debris entering the cavity.  And contamination can often lead to oxidation.  An oxidized seat post cavity will usually result in a seized seat post and that can be a nightmare to repair.

Generally, the head tube will require little attention, however; both the bottom bracket and seat post cavities will take a bit of time to prepare.  I do suggest that you take the time to go through this relatively easy exercise before you begin to paint or assemble any vintage road bicycle frame set.

I suppose that there is a third cavity that warrants attention but I generally consider it to be part of the head tube cavity.  The steering tube attached to the fork set should also be cleaned up at the very least.  Doing so will likely reduce the possibility of finding that a steering stem has stuck at some point in the bicycle's future.

Needless to say, it is best to begin with a fully disassembled frame set.  Working on a seat tube cavity will result in debris falling into the bottom bracket cavity.  And that debris will negatively impact bottom bracket bearing performance and bearing life expectancy.  Working on the bottom bracket, without first cleaning up the seat tube cavity, is also a poor way to go.  Once again, the nicely cleaned and lubricated bottom bracket bearings will only be contaminated by debris falling from the seat tube cavity every time the seat post is adjusted for position.

NEXT - THE SEAT TUBE CAVITY

 

 

 

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