older dura-ace crank, newer pedals

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

Quoted message said:

I have an older bike with a dura-ace crank. The crank accepts a pedal with a 25mm bolt. I'd like
to fit the bike with modern Look pedals - which have a standard thread of 9/16 (I think).

Does anyone know of an adapter that will allow modern pedals to be attached to this older crank?

TIA

Sheldon?

I'm sure these things exist, but you're probably better off buying a "new" pair of D/A 7400 cranks
and calling it good.

Mike

Someone said:

Quoted message said:

I have an older bike with a dura-ace crank. The crank accepts a pedal with a 25mm bolt. I'd like
to fit the bike with modern Look pedals - which have a standard thread of 9/16 (I think).

Does anyone know of an adapter that will allow modern pedals to be attached to this older crank?

Mike S. said:

Sheldon?

You called?

Quoted message said:

I'm sure these things exist, but you're probably better off buying a "new" pair of D/A 7400 cranks
and calling it good.

Actually, the thread on those Dyna Drive cranks is 1" x 24 tpi...you could screw a standard fork
into the right side, but you'd need a left-hand threaded fork for the left.

Adaptor bushings for this purpose used to be available, but they seem to have gone extinct. At
least none of the sources I've tried have any of them left. (I get one or two requests for these
every year.)

New cranks are probably the best way to go...

Sheldon "sheldonbrown.comcranks.htmlOpen ↗" Brown +-----------------------------------------------
+
| A government that robs Peter to pay Paul | can always depend upon the support of Paul. | --George
| Bernard Shaw |
+-----------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone
617-244-9772 FAX 617-244-1041 harriscyclery.comharriscyclery.comOpen ↗ Hard-to-find parts shipped Worldwide
captainbike.comcaptainbike.comOpen ↗ sheldonbrown.comsheldonbrown.comOpen ↗

In article <[email hidden]>,

Sheldon Brown said:

Quoted message said:

Quoted message said:

Does anyone know of an adapter that will allow modern pedals to be attached to this older crank?

Adaptor bushings for this purpose used to be available, but they seem to have gone extinct. At
least none of the sources I've tried have any of them left. (I get one or two requests for these
every year.)

Loose Screws still lists them on their web site - search for 'dyna drive' at:

loosescrews.comloosescrews.comOpen ↗

-Luns

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

Quoted message said:

I have an older bike with a dura-ace crank. The crank accepts a pedal with a 25mm bolt. I'd like
to fit the bike with modern Look pedals - which have a standard thread of 9/16 (I think).

Does anyone know of an adapter that will allow modern pedals to be attached to this older crank?

TIA

Holy cow- you have early '80's Dura-Ace EX or AX series cranks with 1" pedal thread, as seen in this
photo: classicrendezvous.comShim AXgrp.htmOpen ↗

Shimano made an adapter to fit standard (9/16"😉 thread pedals in these cranks. Whether or not
there's still some on the shelf somewhere... I dunno.

Jeff

dcg said:

I have an older bike with a dura-ace crank. The crank accepts a pedal with a 25mm bolt. I'd like
to fit the bike with modern Look pedals - which have a standard thread of 9/16 (I think).

Does anyone know of an adapter that will allow modern pedals to be attached to this older crank?

Shimano adapter #1399901. I might have a set but didn't see them in a quick perusal tonight.
Write me .

--
Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971

mumbo-<< I have an older bike with a dura-ace crank. The crank accepts a pedal with a 25mm bolt. I'd
like to fit the bike with modern Look pedals - which have a standard thread of 9/16 (I think).

Does anyone know of an adapter that will allow modern pedals to be attached to this older crank?

Quoted message said:

Quoted message said:

<BR><BR>

There is and we can get them...pricey tho-about $50 per set.

ahhhh Dynadrive pedals, another attempt for a 'new' standard.

Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
(303)440-3535 vecchios.comvecchios.comOpen ↗ "Ruote convenzionali costruite eccezionalmente bene"

Thanks everyone for your replies. Those are some pretty pricey adapters! I think I'll look for a
crank on eBay.

This is for a 80's Guerciotti - a pretty nice bike with Italian bottom bracket threads.

Will any crank work, or should I look for a particular brand / model ?

Quoted message said:

I have an older bike with a dura-ace crank. The crank accepts a pedal with a 25mm bolt. I'd like to
fit the bike with modern Look pedals - which have a standard thread of 9/16 (I think).

Does anyone know of an adapter that will allow modern pedals to be attached to this older crank?

TIA

I've got an unused set of the cranks and pedals I would like to sell.
tinyurl.com2qakeOpen ↗

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

Quoted message said:

Thanks everyone for your replies. Those are some pretty pricey adapters! I think I'll look for a
crank on eBay.

This is for a 80's Guerciotti - a pretty nice bike with Italian

bottom

Quoted message said:

bracket threads.

Will any crank work, or should I look for a particular brand /

model ?

Anything will work, but in keeping with the AX motif, you should look for a PowerCam. Put it
together with a Browning automatic front derailleur, a Zap rear, and a Helicomatic freehub -- maybe
some Hi-E pedals. Do you have the AX brakes? If not, you might look for some -- or some old roller-
cams or Campy Deltas. Top it all off with some Rigida 13-20s. These are solid parts that will last
you a lifetime! -- Jay Beattie.

"Jay Beattie" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

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

Quoted message said:

Thanks everyone for your replies. Those are some pretty pricey adapters! I think I'll look for a
crank on eBay.

This is for a 80's Guerciotti - a pretty nice bike with Italian

bottom

Quoted message said:

bracket threads.

Will any crank work, or should I look for a particular brand /

model ?

Anything will work, but in keeping with the AX motif, you should look for a PowerCam. Put it
together with a Browning automatic front derailleur, a Zap rear, and a Helicomatic freehub --
maybe some Hi-E pedals. Do you have the AX brakes? If not, you might look for some -- or some old
roller-cams or Campy Deltas. Top it all off with some Rigida 13-20s. These are solid parts that
will last you a lifetime! -- Jay Beattie.

I've got a Heliocomatic wheel if you want it! Just pay shipping...

Mike

Luns Tee said:

Loose Screws still lists them on their web site - search for 'dyna drive' at:

loosescrews.comloosescrews.comOpen ↗

Or try www.highpath.net who can almost certainly knock up a pair.

Jay Beattie said:

Anything will work, but in keeping with the AX motif, you should look for a PowerCam. Put it
together with a Browning automatic front derailleur, a Zap rear, and a Helicomatic freehub --
maybe some Hi-E pedals. Do you have the AX brakes? If not, you might look for some -- or some old
roller-cams or Campy Deltas. Top it all off with some Rigida 13-20s. These are solid parts that
will last you a lifetime! -- Jay Beattie.

I rode a Rigida 13-20 on a Maillard freewheel hub (but not a Helicomatic, thank god) up to work
today. I thought these were hardly stupid lite or intrinsically broken at the level of most of the
other components you listed.

To the OP, you have to match the bottom bracket spindle to the cranks, so if you buy new cranks, you
should either make sure they work with the BB you have, or get a new Italian threaded BB of the
proper spindle length.

Check the length of the spindle. I think it was extra short, 103mm? Most cranks need a bit longer.

Bruce

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

Quoted message said:

Thanks everyone for your replies. Those are some pretty pricey adapters! I think I'll look for a
crank on eBay.

This is for a 80's Guerciotti - a pretty nice bike with Italian bottom bracket threads.

Will any crank work, or should I look for a particular brand / model ?

Quoted message said:

I have an older bike with a dura-ace crank. The crank accepts a pedal with a 25mm bolt. I'd like
to fit the bike with modern Look pedals - which have a standard thread of 9/16 (I think).

Does anyone know of an adapter that will allow modern pedals to be attached to this older crank?

TIA

"Bruce Frech" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Check the length of the spindle. I think it was extra short, 103mm? Most cranks need a bit longer.

Bruce

I'm not so sure about that. IIRC spindles were pretty standard till Shimano tried the low profile
stuff with the ?7410? series. Not sure about the exact # of the first low profile D/A...

Anyone remember any different?

Mike

Mike S. mikeshaw2@coxDOTnet said:

I'm not so sure about that. IIRC spindles were pretty standard till Shimano tried the low profile
stuff with the ?7410? series. Not sure about the exact # of the first low profile D/A...

Quoted message said:

Anyone remember any different?

Sheldon's BB size page sheldonbrown.combbsize.htmlOpen ↗ says the DA AX used a 107-109mm
spindle. The really low profile one is the DA 7410.

Thanks for checking. Mike & Sheldon correct my memory lapse.

Bruce

"Benjamin Weiner" <[email hidden]> wrote in message news:4022f6f2@darkstar...

Quoted message said:

Mike S. mikeshaw2@coxDOTnet said:

I'm not so sure about that. IIRC spindles were pretty standard till Shimano tried the low
profile stuff with the ?7410? series. Not sure

about

Quoted message said:

Quoted message said:

the exact # of the first low profile D/A...

Quoted message said:

Anyone remember any different?

Sheldon's BB size page sheldonbrown.combbsize.htmlOpen ↗ says the DA AX used a 107-109mm
spindle. The really low profile one is the DA 7410.

Mike S. said:

I'm not so sure about that. IIRC spindles were pretty standard till Shimano tried the low profile
stuff with the ?7410? series. Not sure about the exact # of the first low profile D/A...

I've been meaning to put up the 1982 Shimano catalogue I recently scanned, this thread gave me the
push to do the needed Photoshopping.

Looks like 107 mm.

See: sheldonbrown.com15.htmlOpen ↗

Sheldon "Scanner" Brown +------------------------------------------------+
| If you don't want your message to get to me, |
| insert **NO-SPAM** into my email address. |
+------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone
617-244-9772 FAX 617-244-1041 harriscyclery.comharriscyclery.comOpen ↗ Hard-to-find parts shipped Worldwide
captainbike.comcaptainbike.comOpen ↗ sheldonbrown.comsheldonbrown.comOpen ↗

Sheldon Brown said:

See: sheldonbrown.com15.htmlOpen ↗

This is so sweet.

JT

"Jay Beattie" <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

... Put it together with some Rigida 13-20s. These are solid parts that will last you a lifetime!
-- Jay Beattie.

Jay,

In my experience Rigida 13-20's are prone to cracking. These were very common on early TREK bicycles
that were the rage in my area (Madison WI) back some 25 years ago. The 13-20 has single eyelets
only, unlike the MAVIC E3 or MA-2, and with enough miles, the 13-20's will crack.

Bill Putnam