M
Mark
Guest
Hi
I've just finished building an old Viscount frame into a fixer with a
new wheel built on a Miche hub, spaced to 126mm OLN. I've got (what I
think is) a Stronglight 99 chainset with a 42t ring bolted to the inside
with single ring bolts. The chainline looks about right and seems almost
spot-on with the straight-edge-ring-to-sprocket method and about 2mm
off (chainring further outboard than sprocket) by measurement. Is this
close enough?
I'm having trouble getting the chain tension right, probably becuase the
ring is old and no longer circular. Indeed, when adjusted so the chain
is taut at the tightest spot there is 10-15mm of total slack in the run
when at the loosest point. I've tried Sheldon's trick of loosening stack
bolts, tapping the chain and retightening them again but to no avail;
the ring is a firm fit on the spider so I doubt that's the cause of the
eccentricity, anyay. Time for a new ring, right?
I was looking forward to riding it tomorrow
Cheers,
Mark
I've just finished building an old Viscount frame into a fixer with a
new wheel built on a Miche hub, spaced to 126mm OLN. I've got (what I
think is) a Stronglight 99 chainset with a 42t ring bolted to the inside
with single ring bolts. The chainline looks about right and seems almost
spot-on with the straight-edge-ring-to-sprocket method and about 2mm
off (chainring further outboard than sprocket) by measurement. Is this
close enough?
I'm having trouble getting the chain tension right, probably becuase the
ring is old and no longer circular. Indeed, when adjusted so the chain
is taut at the tightest spot there is 10-15mm of total slack in the run
when at the loosest point. I've tried Sheldon's trick of loosening stack
bolts, tapping the chain and retightening them again but to no avail;
the ring is a firm fit on the spider so I doubt that's the cause of the
eccentricity, anyay. Time for a new ring, right?
I was looking forward to riding it tomorrow
Cheers,
Mark