record sprint refurbishment continued

[email hidden] (ccc rider) wrote in message news:<[email hidden]>...

Quoted message said:

I measured the spider's C-C to be ~65mm so BCD is 110mm perhaps:
"Touring double, standard triple outer". Hmmm, anyone else have a
similar old bike with cranks to verify this? I think it's right
though.

Oh well, modern, double chainwheel sets seem to use 130mm.

Any advice? Any spares to throw my way? It seems like I need to search
for 2nd hand or old parts for new chainrings. Or should I just get an
all-new chainset? What would be the best idea?

The following might be of help (found via Google - until now I didn't
know that a TA website existed) re. chainrings; pity it isn't a
full-size diagram, though:

http://www.specialites-ta.com/conseils_tech/montage_plateaux_gb.gif

David E. Belcher

in message <[email hidden]>, ccc rider

(') said:

So ...

a few months ago, starting with an '86 Record Sprint all-original
parts and zero knowledge apart from fixing a puncture, I now have on
the bike:

[snip]

Quoted message said:

But now what ...

Obviously, I need to get a new chain once I've chosen my cassette
(SRAM/Shimano not sure but this newsgroup might not be the right place
for that discussion) but ...

If nine speed or less use a SRAM one with the SRAM magic joining link.
Far better than any of the other magic joining links and streets ahead
of the fancy Shimano break-off-pin jobs which are not reusable.

Quoted message said:

Also, now I examine properly, the chainrings (52-42) are bloody awful.
Some of the teeth look they've been in a brawl and are half missing!

The chainset on my Record Sprint is also bloody awful. Probably, after
the brakes, the worst of the original components. However, it has done
twelve years and it's still there. In due course it will get the
Centaur one off the Dolan when the Dolan gets either a carbon one or a
TA Vega Light.

Quoted message said:

My 'cassette' is 14-24. It's a really pedestrian setup compared to
modern road bikes! I'm nearly always in 42x16 on flat roads but I'm so
unfit the 42x24 is not easy on even those little inclines in Richmond
Park!

I check Sheldon Brown's website
http://www.sheldonbrown.com/gloss_bo-z.html#bcd about cranks in order
to investigate new chain ring possibilities whilst keeping to the
existing bottom bracket and crank.

Don't. The spider on the cranks (at least on mine) is pressed steel with
a little plastic cover to make it look as if it's alloy, and it flexes
like a very flexible thing. Get a whole new crankset. You really will
not regret it.

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/
;; If Python is executable pseudocode,
;; then Perl is executable line noise
-- seen on Slashdot.

Simon Brooke <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

Don't. The spider on the cranks (at least on mine) is pressed steel with
a little plastic cover to make it look as if it's alloy, and it flexes
like a very flexible thing. Get a whole new crankset. You really will
not regret it.

Earlier Record Sprints (the OP said ~1986 for theirs, so definitely
falls into this category) had a reasonable Sugino GT alloy chainset
with replaceable rings (110mm PCD, I think), so I guess they *could*
stick with the original chainset and just get some new rings
(Stronglight ones are fairly cheap). I'd ditch the original BB for a
cartridge one, though, as from memory the Record Sprint BB was a cup
'n' balls job with no seals.

David E. Belcher

David E. Belcher said:

Simon Brooke <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

Don't. The spider on the cranks (at least on mine) is pressed steel with
a little plastic cover to make it look as if it's alloy, and it flexes
like a very flexible thing. Get a whole new crankset. You really will
not regret it.

Earlier Record Sprints (the OP said ~1986 for theirs, so definitely
falls into this category) had a reasonable Sugino GT alloy chainset
with replaceable rings (110mm PCD, I think), so I guess they *could*
stick with the original chainset and just get some new rings
(Stronglight ones are fairly cheap). I'd ditch the original BB for a
cartridge one, though, as from memory the Record Sprint BB was a cup
'n' balls job with no seals.

David E. Belcher

Sugino GT is 110mm PCD, I have one from my 1986 Royal. Until August 2004
it was in use and I would agree it is reasonable. I have since changed
the bike to a triple (1987Deore) but utilised the original 50 toothed
ring, the 36 is servicable but currently an unneeded size.