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Pedal threads too big for crank?
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I have a 70's bike with Shimano 600 arabesque components and just bought a pair of Shimano PD-M324. The threads on the new pedals seem to be just a tiny bit too big for the crank arm. I find this weird since (based on some quick research on Google and YouTube) there seems to be just one size for all pedal and crank arm threads, except for small kids bikes.
I'm wondering if anybody else has successfully mounted these pedals on a similar crank arm? Could the pedals be defective?
I can still put the old pedals back on so I don't think the threads on the crank arm are damaged.
Any advice would be great!
shimano pedals spd
asked 3 hours ago
Jooooooooohn
162
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Jooooooooohn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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up vote
3
down vote
favorite
I have a 70's bike with Shimano 600 arabesque components and just bought a pair of Shimano PD-M324. The threads on the new pedals seem to be just a tiny bit too big for the crank arm. I find this weird since (based on some quick research on Google and YouTube) there seems to be just one size for all pedal and crank arm threads, except for small kids bikes.
I'm wondering if anybody else has successfully mounted these pedals on a similar crank arm? Could the pedals be defective?
I can still put the old pedals back on so I don't think the threads on the crank arm are damaged.
Any advice would be great!
shimano pedals spd
asked 3 hours ago
Jooooooooohn
162
New contributor
Jooooooooohn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
If I recall correctly there were a couple of rare odd ball pedal thread sizes back in 'the early days' - not sure enough to make this an answer though.
– mattnz
2 hours ago
1
Take the right pedal of each pair and lay the two threads alongside each other. The points of one should sit in the valleys of the other pretty well. You can compare the two pedals of each set and they should mesh like this right too.
– Criggie
1 hour ago
@mattnz the only one I remember was dynadrive which was a 1" pedal thread, so massively and obviously different.
– Criggie
1 hour ago
1
@jooooooooohn Silly thought - you do have the left and right pedals the correct way around? They appear to have L and R stamped into the wrench flats.
– Criggie
1 hour ago
Yes, PLEASE make sure you're threading the right pedal into the right crank and the left into the left. Many a crank and pedal is ruined by getting them crossed.
– Daniel R Hicks
26 mins ago
add a comment |Â
up vote
3
down vote
favorite
up vote
3
down vote
favorite
I have a 70's bike with Shimano 600 arabesque components and just bought a pair of Shimano PD-M324. The threads on the new pedals seem to be just a tiny bit too big for the crank arm. I find this weird since (based on some quick research on Google and YouTube) there seems to be just one size for all pedal and crank arm threads, except for small kids bikes.
I'm wondering if anybody else has successfully mounted these pedals on a similar crank arm? Could the pedals be defective?
I can still put the old pedals back on so I don't think the threads on the crank arm are damaged.
Any advice would be great!
shimano pedals spd
asked 3 hours ago
Jooooooooohn
162
New contributor
Jooooooooohn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have a 70's bike with Shimano 600 arabesque components and just bought a pair of Shimano PD-M324. The threads on the new pedals seem to be just a tiny bit too big for the crank arm. I find this weird since (based on some quick research on Google and YouTube) there seems to be just one size for all pedal and crank arm threads, except for small kids bikes.
I'm wondering if anybody else has successfully mounted these pedals on a similar crank arm? Could the pedals be defective?
I can still put the old pedals back on so I don't think the threads on the crank arm are damaged.
Any advice would be great!
shimano pedals spd
shimano pedals spd
asked 3 hours ago
Jooooooooohn
162
New contributor
Jooooooooohn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
Jooooooooohn
162
New contributor
Jooooooooohn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
Jooooooooohn
162
New contributor
Jooooooooohn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
Jooooooooohn
162
asked 3 hours ago
Jooooooooohn
162
162
New contributor
Jooooooooohn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Jooooooooohn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Jooooooooohn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
If I recall correctly there were a couple of rare odd ball pedal thread sizes back in 'the early days' - not sure enough to make this an answer though.
– mattnz
2 hours ago
1
Take the right pedal of each pair and lay the two threads alongside each other. The points of one should sit in the valleys of the other pretty well. You can compare the two pedals of each set and they should mesh like this right too.
– Criggie
1 hour ago
@mattnz the only one I remember was dynadrive which was a 1" pedal thread, so massively and obviously different.
– Criggie
1 hour ago
1
@jooooooooohn Silly thought - you do have the left and right pedals the correct way around? They appear to have L and R stamped into the wrench flats.
– Criggie
1 hour ago
Yes, PLEASE make sure you're threading the right pedal into the right crank and the left into the left. Many a crank and pedal is ruined by getting them crossed.
– Daniel R Hicks
26 mins ago
add a comment |Â
If I recall correctly there were a couple of rare odd ball pedal thread sizes back in 'the early days' - not sure enough to make this an answer though.
– mattnz
2 hours ago
1
Take the right pedal of each pair and lay the two threads alongside each other. The points of one should sit in the valleys of the other pretty well. You can compare the two pedals of each set and they should mesh like this right too.
– Criggie
1 hour ago
@mattnz the only one I remember was dynadrive which was a 1" pedal thread, so massively and obviously different.
– Criggie
1 hour ago
1
@jooooooooohn Silly thought - you do have the left and right pedals the correct way around? They appear to have L and R stamped into the wrench flats.
– Criggie
1 hour ago
Yes, PLEASE make sure you're threading the right pedal into the right crank and the left into the left. Many a crank and pedal is ruined by getting them crossed.
– Daniel R Hicks
26 mins ago
If I recall correctly there were a couple of rare odd ball pedal thread sizes back in 'the early days' - not sure enough to make this an answer though.
– mattnz
2 hours ago
If I recall correctly there were a couple of rare odd ball pedal thread sizes back in 'the early days' - not sure enough to make this an answer though.
– mattnz
2 hours ago
1
1
Take the right pedal of each pair and lay the two threads alongside each other. The points of one should sit in the valleys of the other pretty well. You can compare the two pedals of each set and they should mesh like this right too.
– Criggie
1 hour ago
Take the right pedal of each pair and lay the two threads alongside each other. The points of one should sit in the valleys of the other pretty well. You can compare the two pedals of each set and they should mesh like this right too.
– Criggie
1 hour ago
@mattnz the only one I remember was dynadrive which was a 1" pedal thread, so massively and obviously different.
– Criggie
1 hour ago
@mattnz the only one I remember was dynadrive which was a 1" pedal thread, so massively and obviously different.
– Criggie
1 hour ago
1
1
@jooooooooohn Silly thought - you do have the left and right pedals the correct way around? They appear to have L and R stamped into the wrench flats.
– Criggie
1 hour ago
@jooooooooohn Silly thought - you do have the left and right pedals the correct way around? They appear to have L and R stamped into the wrench flats.
– Criggie
1 hour ago
Yes, PLEASE make sure you're threading the right pedal into the right crank and the left into the left. Many a crank and pedal is ruined by getting them crossed.
– Daniel R Hicks
26 mins ago
Yes, PLEASE make sure you're threading the right pedal into the right crank and the left into the left. Many a crank and pedal is ruined by getting them crossed.
– Daniel R Hicks
26 mins ago
add a comment |Â
1 Answer
1
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oldest
votes
up vote
3
down vote
You have the version of those cranks that came with French pedal threads.
I believe there's enough material to tap them to standard 9/16x20. The difference in diameter is very slight. It's important and not trivial to get the tap going in square.
answered 1 hour ago
Nathan Knutson
20.4k11147
Cool good thinking - That's why I was suggesting to compare the two pedal threads. Would they be obviously different to the eye?
– Criggie
1 hour ago
1
Debatable. French is 14mm and standard is 9/16", which converts to 14.2875mm. It's enough to be subtly noticeable when you're used to dealing with standard pedals all the time. That the pedals in question will be old and usually a French brand is a big clue.
– Nathan Knutson
1 hour ago
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
You have the version of those cranks that came with French pedal threads.
I believe there's enough material to tap them to standard 9/16x20. The difference in diameter is very slight. It's important and not trivial to get the tap going in square.
answered 1 hour ago
Nathan Knutson
20.4k11147
Cool good thinking - That's why I was suggesting to compare the two pedal threads. Would they be obviously different to the eye?
– Criggie
1 hour ago
1
Debatable. French is 14mm and standard is 9/16", which converts to 14.2875mm. It's enough to be subtly noticeable when you're used to dealing with standard pedals all the time. That the pedals in question will be old and usually a French brand is a big clue.
– Nathan Knutson
1 hour ago
add a comment |Â
up vote
3
down vote
You have the version of those cranks that came with French pedal threads.
I believe there's enough material to tap them to standard 9/16x20. The difference in diameter is very slight. It's important and not trivial to get the tap going in square.
answered 1 hour ago
Nathan Knutson
20.4k11147
Cool good thinking - That's why I was suggesting to compare the two pedal threads. Would they be obviously different to the eye?
– Criggie
1 hour ago
1
Debatable. French is 14mm and standard is 9/16", which converts to 14.2875mm. It's enough to be subtly noticeable when you're used to dealing with standard pedals all the time. That the pedals in question will be old and usually a French brand is a big clue.
– Nathan Knutson
1 hour ago
add a comment |Â
up vote
3
down vote
up vote
3
down vote
You have the version of those cranks that came with French pedal threads.
I believe there's enough material to tap them to standard 9/16x20. The difference in diameter is very slight. It's important and not trivial to get the tap going in square.
answered 1 hour ago
Nathan Knutson
20.4k11147
You have the version of those cranks that came with French pedal threads.
I believe there's enough material to tap them to standard 9/16x20. The difference in diameter is very slight. It's important and not trivial to get the tap going in square.
answered 1 hour ago
Nathan Knutson
20.4k11147
answered 1 hour ago
Nathan Knutson
20.4k11147
answered 1 hour ago
Nathan Knutson
20.4k11147
answered 1 hour ago
Nathan Knutson
20.4k11147
20.4k11147
Cool good thinking - That's why I was suggesting to compare the two pedal threads. Would they be obviously different to the eye?
– Criggie
1 hour ago
1
Debatable. French is 14mm and standard is 9/16", which converts to 14.2875mm. It's enough to be subtly noticeable when you're used to dealing with standard pedals all the time. That the pedals in question will be old and usually a French brand is a big clue.
– Nathan Knutson
1 hour ago
add a comment |Â
Cool good thinking - That's why I was suggesting to compare the two pedal threads. Would they be obviously different to the eye?
– Criggie
1 hour ago
1
Debatable. French is 14mm and standard is 9/16", which converts to 14.2875mm. It's enough to be subtly noticeable when you're used to dealing with standard pedals all the time. That the pedals in question will be old and usually a French brand is a big clue.
– Nathan Knutson
1 hour ago
Cool good thinking - That's why I was suggesting to compare the two pedal threads. Would they be obviously different to the eye?
– Criggie
1 hour ago
Cool good thinking - That's why I was suggesting to compare the two pedal threads. Would they be obviously different to the eye?
– Criggie
1 hour ago
1
1
Debatable. French is 14mm and standard is 9/16", which converts to 14.2875mm. It's enough to be subtly noticeable when you're used to dealing with standard pedals all the time. That the pedals in question will be old and usually a French brand is a big clue.
– Nathan Knutson
1 hour ago
Debatable. French is 14mm and standard is 9/16", which converts to 14.2875mm. It's enough to be subtly noticeable when you're used to dealing with standard pedals all the time. That the pedals in question will be old and usually a French brand is a big clue.
– Nathan Knutson
1 hour ago
add a comment |Â
Jooooooooohn is a new contributor. Be nice, and check out our Code of Conduct.
Jooooooooohn is a new contributor. Be nice, and check out our Code of Conduct.
Jooooooooohn is a new contributor. Be nice, and check out our Code of Conduct.
Jooooooooohn is a new contributor. Be nice, and check out our Code of Conduct.
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If I recall correctly there were a couple of rare odd ball pedal thread sizes back in 'the early days' - not sure enough to make this an answer though.
– mattnz
2 hours ago
1
Take the right pedal of each pair and lay the two threads alongside each other. The points of one should sit in the valleys of the other pretty well. You can compare the two pedals of each set and they should mesh like this right too.
– Criggie
1 hour ago
@mattnz the only one I remember was dynadrive which was a 1" pedal thread, so massively and obviously different.
– Criggie
1 hour ago
1
@jooooooooohn Silly thought - you do have the left and right pedals the correct way around? They appear to have L and R stamped into the wrench flats.
– Criggie
1 hour ago
Yes, PLEASE make sure you're threading the right pedal into the right crank and the left into the left. Many a crank and pedal is ruined by getting them crossed.
– Daniel R Hicks
26 mins ago