Bicycle pedal threads
 

Bicycles are very cheap at garage sales people buy them to ride them
to get fit and don't. I bought a decent bike for just $2. My point is
that they are cheap enough to have a couple of parts bikes in the
attic. Because of their cheapness, I consider them to be throwaways.

i

On 2009-04-13, Randy wrote:
Who's the idiot that made these things 9/16-20? Now I had to order a
special tap to fix my sons bike. MSC does not even carry the LH
version. McMaster does. Luckily I only needed the RH one. LH is
almost $70.00 OUCH.

www.parktool.com for special bike tools, I might have to order the set
off ebay, local bike is listed as a park tool dealer, they never heard
of a tap or park tool. WOW.

Thank You,
Randy

Remove 333 from email address to reply.

Bicycle pedal threads
 

"Randy" wrote in message
...
Who's the idiot that made these things 9/16-20? Now I had to order a
special tap to fix my sons bike. MSC does not even carry the LH
version. McMaster does. Luckily I only needed the RH one. LH is
almost $70.00 OUCH.

www.parktool.com for special bike tools, I might have to order the set
off ebay, local bike is listed as a park tool dealer, they never heard
of a tap or park tool. WOW.

Thank You,
Randy

Remove 333 from email address to reply.

Just buy a new pedal arm.

Bicycle pedal threads
 

Who's the idiot that made these things 9/16-20? Now I had to order a
special tap to fix my sons bike. MSC does not even carry the LH
version. McMaster does. Luckily I only needed the RH one. LH is
almost $70.00 OUCH.

www.parktool.com for special bike tools, I might have to order the set
off ebay, local bike is listed as a park tool dealer, they never heard
of a tap or park tool. WOW.

Thank You,
Randy

Remove 333 from email address to reply.

Bicycle pedal threads
 

"Randy" wrote in message
...
Who's the idiot that made these things 9/16-20? Now I had to order a
special tap to fix my sons bike. MSC does not even carry the LH
version. McMaster does. Luckily I only needed the RH one. LH is
almost $70.00 OUCH.

www.parktool.com for special bike tools, I might have to order the set
off ebay, local bike is listed as a park tool dealer, they never heard
of a tap or park tool. WOW.

Thank You,
Randy

Remove 333 from email address to reply.

I remember cross threading one of my pedals when I was a kid. I am guessing
that is what happened to your son's bike. I was able to start the pedal from
the backside and reform the threads. How I thought of this at 11 or 12 I
don't know, but it straightened out the threads enough that I was able to
reinstall the pedal. I also remember taking apart the Bendix brake and never
having work properly again though too. Ahhh those were the days riding my
bike with a playing card flapping on the spokes held in place with a clothes
pin.
Steve

Bicycle pedal threads
 

On Mon, 13 Apr 2009 15:38:46 -0500, Randy
wrote:

Who's the idiot that made these things 9/16-20? Now I had to order a
special tap to fix my sons bike. MSC does not even carry the LH
version. McMaster does. Luckily I only needed the RH one. LH is
almost $70.00 OUCH.

www.parktool.com for special bike tools, I might have to order the set
off ebay, local bike is listed as a park tool dealer, they never heard
of a tap or park tool. WOW.

Thank You,
Randy

Remove 333 from email address to reply.

Ouch! that one is a toughy. I checked three of my favorite
bike part sites, nada... FWIW I have dealt with these two
companies years ago with decent results:

http://www.nashbar.com/

http://www.performancebike.com/

This one has some odd things, but I've never ordered from
them:

http://www.thethirdhand.com/

You could always try sending them (Nashbar/Performance) an
email, ask if they can get the Park TAP-6 and what it would
cost. It used to be a lot cheaper getting my stuff through
them.

You maybe able to by a whole crank arm cheaper. Be sure and
get the right length and Crank/BB mount style.

--
Leon Fisk
Grand Rapids MI/Zone 5b
Remove no.spam for email

Bicycle pedal threads
 

Randy wrote:

Who's the idiot that made these things 9/16-20? Now I had to order a
special tap to fix my sons bike. MSC does not even carry the LH
version. McMaster does. Luckily I only needed the RH one. LH is
almost $70.00 OUCH.

I have a set of 9/16-20 RH and LH taps you could borrow if you're doing
a one-off. They are really not in the best of shape, I salvaged them 30+
years ago from a shop that burned down. If carefully cleaned up and you
were careful, I think you could get a decent thread out of them.

Ping my email direct if you're interested.

Jon

Bicycle pedal threads
 

I don't know what brand you have there, but I seem to remember that,
when I was a kid,(1940's and 1950) the Schwinn was the one that was
totally non-standard.

Pete Stanaitis


Randy wrote:
Who's the idiot that made these things 9/16-20? Now I had to order a
special tap to fix my sons bike. MSC does not even carry the LH
version. McMaster does. Luckily I only needed the RH one. LH is
almost $70.00 OUCH.

www.parktool.com for special bike tools, I might have to order the set
off ebay, local bike is listed as a park tool dealer, they never heard
of a tap or park tool. WOW.

Thank You,
Randy

Remove 333 from email address to reply.

Bicycle pedal threads
 

"Up North" wrote in message
...

"Randy" wrote in message
...
Who's the idiot that made these things 9/16-20? Now I had to order a
special tap to fix my sons bike. MSC does not even carry the LH
version. McMaster does. Luckily I only needed the RH one. LH is
almost $70.00 OUCH.

www.parktool.com for special bike tools, I might have to order the set
off ebay, local bike is listed as a park tool dealer, they never heard
of a tap or park tool. WOW.

Thank You,
Randy

Remove 333 from email address to reply.

I remember cross threading one of my pedals when I was a kid. I am
guessing that is what happened to your son's bike. I was able to start the
pedal from the backside and reform the threads. How I thought of this at
11 or 12 I don't know, but it straightened out the threads enough that I
was able to reinstall the pedal. I also remember taking apart the Bendix
brake and never having work properly again though too. Ahhh those were the
days riding my bike with a playing card flapping on the spokes held in
place with a clothes pin.
Steve


We went for corrugated cardboard with three or more clothes pegs along with
the extended front "chopper" forks then again we were rebels.........

Bicycle pedal threads
 

On Mon, 13 Apr 2009 20:21:44 -0500, spaco wrote:

I don't know what brand you have there, but I seem to remember that,
when I was a kid,(1940's and 1950) the Schwinn was the one that was
totally non-standard.


Almost all pedals made today are threaded 9/16 x 20.

The reason that the left-hand ones are threaded that way to to prevent them
unscrewing due to precession.

A small number of (usually) cheaper pedals are still made with 1/2 x 20.

Previously there were metric-threaded pedals made (14mm x 1.25); and I
believe that there may have been two varieties of these depending on thread
form angles.

Pedals are usually marked R and L (or D or G, or D or S; for French and
Italian, respectively).

Shimano, the goliath of bicycle equipment manufacturer, as part of their
unending practice of introducing "new, therefore better, therefore you must
buy it") bits of kit that just happen to not be compatible with the old
kit, did try to sell a set of unusual pedals with 1 x 24 thread; not a
commercial success.

Any decent bicycle shop will have the thread taps and ought to run it
through your mangled crank arm for a modest fee; if they happen to be
metric a 9/16 x 20 tap will change them without too much difference in the
thread (it's 14.28 x 1.27, and the arm will only be about 5/8 of an inch
thick).

Bicycle pedal threads
 

On Mon, 13 Apr 2009 14:12:46 -0800, Jon Anderson
wrote:

Randy wrote:

Who's the idiot that made these things 9/16-20? Now I had to order a
special tap to fix my sons bike. MSC does not even carry the LH
version. McMaster does. Luckily I only needed the RH one. LH is
almost $70.00 OUCH.

I have a set of 9/16-20 RH and LH taps you could borrow if you're doing
a one-off. They are really not in the best of shape, I salvaged them 30+
years ago from a shop that burned down. If carefully cleaned up and you
were careful, I think you could get a decent thread out of them.

Ping my email direct if you're interested.

Jon

Thanks for the offer, I did order one from MSC yesterday, shhould be
here about 2PM.

Thank You,
Randy

Remove 333 from email address to reply.

Bicycle pedal threads
 

On Tue, 14 Apr 2009 13:17:43 GMT, _
wrote:

On Mon, 13 Apr 2009 20:21:44 -0500, spaco wrote:

I don't know what brand you have there, but I seem to remember that,
when I was a kid,(1940's and 1950) the Schwinn was the one that was
totally non-standard.


Almost all pedals made today are threaded 9/16 x 20.

The reason that the left-hand ones are threaded that way to to prevent them
unscrewing due to precession.

A small number of (usually) cheaper pedals are still made with 1/2 x 20.

Previously there were metric-threaded pedals made (14mm x 1.25); and I
believe that there may have been two varieties of these depending on thread
form angles.

Pedals are usually marked R and L (or D or G, or D or S; for French and
Italian, respectively).

Shimano, the goliath of bicycle equipment manufacturer, as part of their
unending practice of introducing "new, therefore better, therefore you must
buy it") bits of kit that just happen to not be compatible with the old
kit, did try to sell a set of unusual pedals with 1 x 24 thread; not a
commercial success.

Any decent bicycle shop will have the thread taps and ought to run it
through your mangled crank arm for a modest fee; if they happen to be
metric a 9/16 x 20 tap will change them without too much difference in the
thread (it's 14.28 x 1.27, and the arm will only be about 5/8 of an inch
thick).

Running a tap through would not fix this arm, end was completely
stripped out smooth, and egg shaped. Milled the end off and made a
new end from 7/8 crs. welded it on and drilled and tapped it. Old
end was 3/4 dia and I went a little bigger for more wall thickness.

I wonder if I could have used a 1/2-20 STI tap, (helicoil) it
measures 0.569" major diameter.

Thank You,
Randy

Remove 333 from email address to reply.

Bicycle pedal threads
 

On Mon, 13 Apr 2009 15:38:46 -0500, Randy wrote:

Who's the idiot that made these things 9/16-20? Now I had to order a
special tap to fix my sons bike. MSC does not even carry the LH
version. McMaster does. Luckily I only needed the RH one. LH is
almost $70.00 OUCH.


Back to the original question, If old pedals were 1/2" NF why did they
not just go to 9/16 NF if they wanted bigger/stronger threads. Who
decided that 20 TPI was somehow magical? Special is better, idiots.

Thank You,
Randy

Remove 333 from email address to reply.

Bicycle pedal threads
 

Randy wrote:

Back to the original question, If old pedals were 1/2" NF why did they
not just go to 9/16 NF if they wanted bigger/stronger threads. Who
decided that 20 TPI was somehow magical? Special is better, idiots.


9/16 x 20tpi would be the British "cycle thread", which probably
predates NF. Not to say that it's better, but given that they invented
the current bicycle system, I guess it's reasonable that they specified
the threads too. Nice that most makers followed suit.

Jordan