upgrading an old Dawes Galaxy - help needed !!

Pete A said:

Thanks for comments Pete.

Have fitted 110 bb - bike shop said this would give the best chain
line possible, although it is still not good. Think problem is is that
is must have originally been a 10 speed setup, and spacing at rear is
not ideal for 7 speed freewheel. Wheel looks quite dished to me. Also,
when I bought it it had been converted to a single speed setup, so the
spacing on the rear wheel axle had to be changed. Bloke in bike shop
says that this era of bike was never designed to have a triple
chainset fitted, but I would have thought it would be possible to fit
a triple to any bike, perhaps Im wrong ?

I would have thought so too. I fitted a Campag road triple and 130mm
wheel to my 1980's Raleigh that was designed for a double. Works well
enough.

Quoted message said:

Yes, have thought of fitting
a 113bb, but would this move the inner ring out a full 3mm more ?

No, only 1.5mm if the BB is symmetrical, like most are.

Quoted message said:

If
so, and if the chain line is still possible, then I may have to do
this. Alternatively I thought I may look for a standard road triple
chainset - this would allow me to move the front mech higher up the
frame & also solving problem (wanted lowish gearing cos I want to do
fully loaded touring at some point on bike).

A road triple would be a decent solution if you can tolerate a minimum
middle ring of 38T for Shimano or 39T for Campag. Inner ring can go down
to 24T.

~PB

Pete Biggs said:

I would have thought so too. I fitted a Campag road triple and 130mm
wheel to my 1980's Raleigh that was designed for a double. Works well
enough.

JPEGS!

130mm wheel? most wheels are around the 650mm size..

...d

"Pete Biggs" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Pete A said:

Thanks for comments Pete.

Have fitted 110 bb - bike shop said this would give the best chain
line possible, although it is still not good. Think problem is is that
is must have originally been a 10 speed setup, and spacing at rear is
not ideal for 7 speed freewheel. Wheel looks quite dished to me. Also,
when I bought it it had been converted to a single speed setup, so the
spacing on the rear wheel axle had to be changed. Bloke in bike shop
says that this era of bike was never designed to have a triple
chainset fitted, but I would have thought it would be possible to fit
a triple to any bike, perhaps Im wrong ?

I would have thought so too. I fitted a Campag road triple and 130mm
wheel to my 1980's Raleigh that was designed for a double. Works well
enough.

Quoted message said:

Yes, have thought of fitting
a 113bb, but would this move the inner ring out a full 3mm more ?

No, only 1.5mm if the BB is symmetrical, like most are.

Quoted message said:

If
so, and if the chain line is still possible, then I may have to do
this. Alternatively I thought I may look for a standard road triple
chainset - this would allow me to move the front mech higher up the
frame & also solving problem (wanted lowish gearing cos I want to do
fully loaded touring at some point on bike).

A road triple would be a decent solution if you can tolerate a minimum
middle ring of 38T for Shimano or 39T for Campag. Inner ring can go down
to 24T.

~PB

There is an alternative - Stronglight make the impact triple - designed fro
111mm bottom bracket, sensible rings available - 26,36,46 and 28,38,48,
24,34,46 or custom to choice, lowest inside ring is 24. Avaiable from
www.spacycles.co.uk for £38

HTH
Julia

Pete A said:

Have fitted 110 bb - bike shop said this would give the best
chain line possible, although it is still not good.

Your mechanic is going by the book, but not using his loaf. Those cranks
were generally specced with a 110 or 113mm bottom brackets, the 110 being
for frames with conventional frame tubes, and 113 for oversized. However,
those specs apply to bikes with a 135mm rear end. A 107mm would be a better
choice, but as I said, 110 isn't bad.

Quoted message said:

Think problem is is that is must have originally been a 10 speed setup,
and spacing at rear is not ideal for 7 speed freewheel. Wheel looks quite
dished to me. Also, when I bought it it had been converted to a single
speed setup, so the spacing on the rear wheel axle had to be changed.
Bloke in bike shop says that this era of bike was never designed to have
a triple chainset fitted, but I would have thought it would be possible

to fit

Quoted message said:

a triple to any bike, perhaps Im wrong ?

Older Galaxies didn't come with triples, but their contemporaries did, and
there's nothing materially different between your Galaxy and more modern
bikes that come with triples fitted as standard.

Quoted message said:

Yes, have thought of fitting a 113bb, but would this move the inner ring
out a full 3mm more ? If so, and if the chain line is still possible,

then I

Quoted message said:

may have to do this.

The bottom bracket isn't the problem. If your front derailleur is hitting
the chainstay, _you_have_the_wrong_front_derailleur_.

Quoted message said:

Alternatively I thought I may look for a standard road triple
chainset - this would allow me to move the front mech higher
up the frame & also solving problem (wanted lowish gearing
cos I want to do fully loaded touring at some point on bike).

If you want to go touring, keep your compact triple. A new road crankset
will probably need a new bottom bracket to match. If you want a higher top
gear, buy a bigger big chainring for the cranks you have. Rings as big as
50 teeth are widely available. But don't replace the cranks to accommodate
your front derailleur. Derailleurs are cheap, while cranks are not.

James Thomson

JBB said:

There is an alternative - Stronglight make the impact triple -

A quibble: Sugino make the Impact triple. Stronglight just sell it.

James Thomson

David Martin said:

Quoted message said:

I would have thought so too. I fitted a Campag road triple and 130mm
wheel to my 1980's Raleigh that was designed for a double. Works
well enough.

JPEGS!

130mm wheel? most wheels are around the 650mm size..

Nah, they're boring. My other wheel's a 100mm.

~PB

Pete Biggs said:

Pete A said:

Thanks for comments Pete.

Have fitted 110 bb - bike shop said this would give the best chain
line possible, although it is still not good. Think problem is is that
is must have originally been a 10 speed setup, and spacing at rear is
not ideal for 7 speed freewheel. Wheel looks quite dished to me. Also,
when I bought it it had been converted to a single speed setup, so the
spacing on the rear wheel axle had to be changed. Bloke in bike shop
says that this era of bike was never designed to have a triple
chainset fitted, but I would have thought it would be possible to fit
a triple to any bike, perhaps Im wrong ?

I would have thought so too. I fitted a Campag road triple and 130mm
wheel to my 1980's Raleigh that was designed for a double. Works well
enough.

My 1980s Raleigh has been retro fitted with a 1980s Deore triple
chainset and modern 105 triple front mech. 122.5mm BB, no problems at
all. This machine came with a double and 6 speed block. It got new
wheels with 6 speed cassette, then 8 speed cassette (on the same freehub
body) then the triple chainset. Along the way the frame was respaced for
the new wheels.