Chainring clearance
- Thread starter dg01
- Start date
Midlife
Retro Wizard
http://www.ebay.co.uk/itm/SAKAE-RINGYO- ... 6016.l4276
I guess it would have had a cup and cone jobby like the above originally?
Shaun
I guess it would have had a cup and cone jobby like the above originally?
Shaun
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I have found that if one instals a bottom bracket unit with a flange which screws up against the BB housing (such as cup and cone, or 1990’s Campag sealed cartridge unit, for example) a thin spacer can be inserted that can alter the chainline slightly. These spacers can be bought from various suppliers, for example http://www.sjscycles.co.uk/wheels-manuf ... -prod17701
ScillySuffolk
Retro Guru
Measure your chainline and work back from there.
Steelframeman
Dirt Disciple
I've read somewhere there is meant to be normally 5.mm clearance, as shown in photo is far too little.
Silly question did you order exactly the same width BB axle, if so how come this ? another (cheaper) option is to install a spacer on the drive / crank side, OK this pulls the whole unit through to the drive side by the width of the spacer normally about 1.5 or 2.mm if I remember, then the left-side (which is a threaded bush) needs taking in to allow the same amount of sleeve on the left side bearing, I have done it before when building up a frame from scratch & you have no idea what the original intended BB width was meant to be.
Otherwise new sealed longer BB, remember when you order only half of the extra length will be on the crank side, so if you order an extra one 5.mm longer 2.5mm will be on the crank side the rest of the left side.
Silly question did you order exactly the same width BB axle, if so how come this ? another (cheaper) option is to install a spacer on the drive / crank side, OK this pulls the whole unit through to the drive side by the width of the spacer normally about 1.5 or 2.mm if I remember, then the left-side (which is a threaded bush) needs taking in to allow the same amount of sleeve on the left side bearing, I have done it before when building up a frame from scratch & you have no idea what the original intended BB width was meant to be.
Otherwise new sealed longer BB, remember when you order only half of the extra length will be on the crank side, so if you order an extra one 5.mm longer 2.5mm will be on the crank side the rest of the left side.
