D
dkahn400
Guest
Following my exploding front rim last month I've now had a failure on
the rear rim, although a much less dramatic one. I noticed yesterday
that the rear brakes appeared to be binding slightly when wheeling the
bike. Checking the wheel it was substantially out of true although no
spokes were broken or obviously loose. I rode it home gently and on
arriving had a closer look. There is a large crack around one of the
spoke eyelets and a bulge where the spoke is starting to pull through
the rim.
The rim is a Mavic MA3, and I know there have been a number of similar
cases of failure in them. It's just under a year old as I changed it
immediately after last year's York rally when it's predecessor, an
Ambrosio Evolution like the one that exploded, developed a sidewall
bulge on the ride up there. The spokes are the original straight gauge
ones from the machine built wheel that came with the bike. According to
Sheldon this type of failure is more common with straight gauge spokes.
I've ordered a Rigida Chrina rim from Spa Cycles and will replace the
MA3 when this arrives. I will then have matching rims again. This will
be the 4th rim that particular combination of hub and spokes have had.
Rather irritatingly the spoke hole is not in the correct place (typical
of machine built wheels) and it is impossible to relocate it properly
in the wide gap between pairs of leading and trailing spokes without
relacing the hub, which would probably be a bad idea.
--
Dave...
the rear rim, although a much less dramatic one. I noticed yesterday
that the rear brakes appeared to be binding slightly when wheeling the
bike. Checking the wheel it was substantially out of true although no
spokes were broken or obviously loose. I rode it home gently and on
arriving had a closer look. There is a large crack around one of the
spoke eyelets and a bulge where the spoke is starting to pull through
the rim.
The rim is a Mavic MA3, and I know there have been a number of similar
cases of failure in them. It's just under a year old as I changed it
immediately after last year's York rally when it's predecessor, an
Ambrosio Evolution like the one that exploded, developed a sidewall
bulge on the ride up there. The spokes are the original straight gauge
ones from the machine built wheel that came with the bike. According to
Sheldon this type of failure is more common with straight gauge spokes.
I've ordered a Rigida Chrina rim from Spa Cycles and will replace the
MA3 when this arrives. I will then have matching rims again. This will
be the 4th rim that particular combination of hub and spokes have had.
Rather irritatingly the spoke hole is not in the correct place (typical
of machine built wheels) and it is impossible to relocate it properly
in the wide gap between pairs of leading and trailing spokes without
relacing the hub, which would probably be a bad idea.
--
Dave...