I received a Vision Trimax 30 from a customer for inspection.
As for the inspection itself, there wasn't really much worth writing about.
The Trimax 30 has multiple models with the same name but different years,
so the specs keep changing.
The machining near the holes on the inner side of the rim, and
the way the drain holes are positioned is a complete copy of Fulcrum, but
I'll set that aside for now
and dispose of the old Fulcrum and Campagnolo rims
by cutting them down to a disposable size.
I've been cutting most of these with a clipper, but
I made a clean cut with a hacksaw on this section.
This area includes the rim seam, and
Fulcrum and Campagnolo aluminum rims
(excluding low-profile rim models and budget models) have filler material at the seam.
This acts as a barrier, so when replacing rims,
the nipples inserted inside the rim cannot travel all the way around the rim interior.
Since it's at the rim seam, it probably does provide reinforcement,
but the manufacturers call it RDB (Rim Dynamic Balance),
so it seems the weight-balancing function is the primary purpose.
"RDB" is trademarked, just like Campagnolo's "G3" or "CULT," but
I don't believe it's patented.
So, with this Vision wheel,
when I inserted a nipple inside the rim to check, there was a wall
at the seam location, on the opposite side of the valve hole.
The way they slightly raise the inner rim section at the seam phase
is a copy of Mavic, not Fulcrum. Hmm, refreshingly shameless.
As for the inspection itself, there wasn't really much worth writing about.
The Trimax 30 has multiple models with the same name but different years,
so the specs keep changing.
The machining near the holes on the inner side of the rim, and
the way the drain holes are positioned is a complete copy of Fulcrum, but
I'll set that aside for now
and dispose of the old Fulcrum and Campagnolo rims
by cutting them down to a disposable size.
I've been cutting most of these with a clipper, but
I made a clean cut with a hacksaw on this section.
This area includes the rim seam, and
Fulcrum and Campagnolo aluminum rims
(excluding low-profile rim models and budget models) have filler material at the seam.
This acts as a barrier, so when replacing rims,
the nipples inserted inside the rim cannot travel all the way around the rim interior.
Since it's at the rim seam, it probably does provide reinforcement,
but the manufacturers call it RDB (Rim Dynamic Balance),
so it seems the weight-balancing function is the primary purpose.
"RDB" is trademarked, just like Campagnolo's "G3" or "CULT," but
I don't believe it's patented.
So, with this Vision wheel,
when I inserted a nipple inside the rim to check, there was a wall
at the seam location, on the opposite side of the valve hole.
The way they slightly raise the inner rim section at the seam phase
is a copy of Mavic, not Fulcrum. Hmm, refreshingly shameless.