Moving BB shell 1" forward: Effect?

On Sun, 05 Mar 2006 19:08:00 -0500, "(PeteCresswell)" <[email hidden]>

Quoted message said:

... I have no clue as what moving the BB spindle an inch forward will do the
handling of my frame - which was built around the old one.

I'm assuming that Maverick has redesigned their frame geometry around the new
link - but that's only an assumption.

Anybody care to speculate?

IMO, if you install a longer stem and move the seat forward an inch,
the only effect will be that downhills will seem slightly steeper and
more squirrely while climbing will become slightly more stable whether
seated or standing.
--
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(PeteCresswell) said:

But I note that this year Maverick has redesigned their link so that it is
aluminum i-beam construction instead of a magnesium box. Part of the redesign
has been to move the BB shell about an inch forward of where it was on the old
mag version.

Quoted message said:

But I have no clue as what moving the BB spindle an inch forward will do the
handling of my frame - which was built around the old one.

It will make the effective seat tube angle a bit shallower, and it will
shift the weight balance forward just a bit when standing to pedal,
that's about it. Doesn't strike me as a big change. If you run your bars
relatively high, you may prefer the shallower effective angle, and if
you don't have a leg clearance problem (to the bars) when standing, that
probably won't bother you, either.

(PeteCresswell) said:

Tore out the threads on my Maverick magnesium BB monolink and they're sending me
another one on warranty.

But I note that this year Maverick has redesigned their link so that it is
aluminum i-beam construction instead of a magnesium box. Part of the redesign
has been to move the BB shell about an inch forward of where it was on the old
mag version.

Quoted message said:

But I have no clue as what moving the BB spindle an inch forward will do the
handling of my frame - which was built around the old one.

I'm assuming that Maverick has redesigned their frame geometry around the new
link - but that's only an assumption.

Anybody care to speculate?

Can you provide photos of the new and old systems? In addition to the
handling concerns, I wonder if the relationship between pivot point and
bottom bracket will change if you mix the two systems. That might affect
the movement of the suspension, especially it's sensitivity to
pedal-induced bob.

--
Dave
dvt at psu dot edu

Per dvt:

Quoted message said:

Can you provide photos of the new and old systems? In addition to the
handling concerns, I wonder if the relationship between pivot point and
bottom bracket will change if you mix the two systems. That might affect
the movement of the suspension, especially it's sensitivity to
pedal-induced bob.

I finally got around to doing the obvious and got hold of Maverick's tech
support guy.

I had assumed that the redesigned the frame around the new link.

I was wrong. Same frame, new link.

So I guess that disposes of any concern I had about it messing up the bike's
geometry.

If you're wondering what the heck this thing is in the first place, I cannot
find a pic that shows it. Both Maverick and Seven's sites only show photos
taken from the drive side - where the chain wheels hide the link.
--
PeteCresswell