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flangeless pedal spindle

Old 05-17-19, 10:14 PM
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flangeless pedal spindle

see pic...the left one is old pedal...has a big flange.

the right one is new pedal...no flange.

will lack of flange damage the crank thread (aluminum roadbike crank) when i tighten the pedal?


Last edited by mtb_addict; 05-17-19 at 10:18 PM.
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Old 05-17-19, 11:12 PM
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The right one is meant for steel Ashtabula cranks.
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Old 05-18-19, 02:06 AM
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Originally Posted by davidad View Post
The right one is meant for steel Ashtabula cranks.
Are those the ones that use 1/2" pedal spindles?

But, yes, I was wondering about steel cranks.

It is hard to see the details, but that also appears to be quite a cheap pedal set.
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Old 05-18-19, 03:38 AM
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Originally Posted by CliffordK View Post
Are those the ones that use 1/2" pedal spindles?
no. both pedals are 9/16.

Last edited by mtb_addict; 05-18-19 at 10:19 AM.
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Old 05-18-19, 07:26 AM
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Originally Posted by CliffordK View Post

It is hard to see the details, but that also appears to be quite a cheap pedal set.
OP picking from bottom of cost options has been a pattern..


Not 'flangeless' just less pronounced.. if a concern seek out Pedal Washers....
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Old 05-18-19, 08:22 AM
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Originally Posted by fietsbob View Post
OP picking from bottom of cost options has been a pattern..

...
i want block peddles for commuting.

Last edited by mtb_addict; 05-18-19 at 10:04 AM.
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Old 05-18-19, 08:55 AM
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Typical Pedal Washers .
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Old 05-18-19, 09:54 AM
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Originally Posted by davidad View Post
The right one is meant for steel Ashtabula cranks.
i happen to have another bike with Ashtabula crank. below is the peddle from this bike. as u see, it also has a big flange.

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Old 05-18-19, 09:58 AM
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Originally Posted by fietsbob View Post
Typical Pedal Washers .
i would really hate to have to incresae the Q. Washer will add a few mm.

i might just look for another peddle with big flange. looks like these were either poorly designed or intended for some some different type of crank.

Last edited by mtb_addict; 05-18-19 at 10:02 AM.
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Old 05-18-19, 10:00 AM
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Originally Posted by CliffordK View Post
It is hard to see the details, but that also appears to be quite a cheap pedal set.
The right one is a touring block peddle.
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Old 05-18-19, 10:02 AM
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So? then get the MKS 3000R pedals ..

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Old 05-18-19, 10:15 AM
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ok. so i put this "flangeless" pedal on the crank.

i can feel it is digging into the soft aluminum crank. and i am scared to tighten it too much.

now i am starting to think the flangelessness is actually a designed innovation. i am thinking...by digging into the aluminum, it is wegding itself tight w/o alot of torque, that prevent pedal from coming loose.

Last edited by mtb_addict; 05-18-19 at 11:36 AM.
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Old 05-18-19, 10:29 AM
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Originally Posted by mtb_addict View Post
now i am starting to think the flangelessness is a design feature. i am thinking...by digging into the aluminum, this is acting like a lock that prevents pedal from coming loose.
Doubtful. Block pedals coexisted with steel cranks for decades. Nothing about your block pedal was designed with aluminum cranks in mind. Digging into the aluminum sounds like a good way to start a crack at a bad location.
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Old 05-18-19, 10:38 AM
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i would really hate to have to increase the Q. Washer will add a few mm.

Ever read 'the Princess and the Pea'? It's 1.5mm thick and you are that sensitive ?
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Old 05-18-19, 01:25 PM
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Originally Posted by mtb_addict View Post
i would really hate to have to incresae the Q. Washer will add a few mm.
Originally Posted by Trakhak View Post
Doubtful. Block pedals coexisted with steel cranks for decades. Nothing about your block pedal was designed with aluminum cranks in mind. Digging into the aluminum sounds like a good way to start a crack at a bad location.
That's why a pedal washer is a good idea. A 1mm washer on each pedal adds 2mm to the overall Q-factor. If you can consistently place your foot on a block pedal within 2mm of accuracy and/or feel a 2mm change in Q-factor you're a far more sensitive rider than I am.
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Old 05-18-19, 03:54 PM
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i have a medical problem with knee pain. i find lower Q alleviate the pain.
i always put my foot as close to crank as possible, and i frequently look down ti check. i already using a shortened BB . i dontvknow if 2mm would make difference, but i try to do my best.

Last edited by mtb_addict; 05-18-19 at 04:08 PM.
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Old 05-18-19, 05:42 PM
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Originally Posted by mtb_addict View Post
i can feel it is digging into the soft aluminum crank. and i am scared to tighten it too much.
There is no need to install any pedal using gorilla torque. Just tighten them firmly and no more. They will not loosen while pedaling.
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