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Weird "popping" sensation on one side of XT pedal??

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Weird "popping" sensation on one side of XT pedal??

Old 05-15-15, 02:39 PM
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leicanthrope
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Weird "popping" sensation on one side of XT pedal??

I've been riding with a pair of Shimano XT (PD-M780) pedals that have just a hair over 2000 miles on them. Commuter bike, no bouncing off the sides of cliff faces or anything. Every now and then, there's a slight "popping" sensation that's noticeable on the recovery phase of the pedal stroke. It doesn't feel like the cleat is coming out of the pedal, more like there's something wrong with the shoe. (Initially I was looking at my shoes wondering if something was starting to break.) Tried different shoes, switched cleats, and neither has really solved it. Tried cleaning, lubing, oiling, and various voodoo incantations. It's still most pronounced on the left pedal, but now I've started to notice it on the right pedal as well to a lesser extent. Tightened the tension a notch yesterday, and that helped. Still there though. The odd thing is that it only seems to happen when I'm clipped in to the bottom side (if you were looking at the pedal from the side, the XT logo would be upside down) that this happens.

Anyhow, any thoughts on this? Should I just tighten up the tension until it goes away? Accept this as a natural sign of XT pedal aging, or is this some sort of huge red flag of impending doom that I'm not aware of?
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Old 05-15-15, 02:57 PM
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Might not be the pedals.

Are you sure the crank arms are tight..?
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Old 05-15-15, 03:26 PM
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Try swapping in a set of platform pedals to help isolate the problem by eliminating shoes and cleats; clean and grease the threads and mating surfaces and tighten them firmly. Check your cranks and chain ring bolts for proper torque.
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Old 12-03-16, 11:30 PM
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Did you ever get this fixed? mine do the same after many miles.
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Old 12-05-16, 07:38 AM
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Is this just a noise or something you actually feel in your foot? I've had a noise like a "ping" or "ting" with one pedal that would come and go--more likely in warmer (above 70F?) conditions. A different pedal on the same crank took care of the noise. But the problem pedal on a different bike doesn't make the sound.
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Old 12-05-16, 08:20 AM
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For me fixing it was a case of adjusting bearings a little but moreso replacing the "top plate". Shimano topplates are $6 each and wear from cleat. My left pedal needed a new top plate after 6 years of almost daily service.
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Old 12-05-16, 12:28 PM
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I solved by maxing out the tension screw on the offending pedal.
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Old 12-05-16, 06:20 PM
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Originally Posted by jbucky1 View Post
For me fixing it was a case of adjusting bearings a little but moreso replacing the "top plate". Shimano topplates are $6 each and wear from cleat. My left pedal needed a new top plate after 6 years of almost daily service.
That sounds like the best fix. I just use the base model PD-M520 and they are on special for $28 at the moment. Perhaps I'll just fit another set and bin the others if they develop the issue. M520 Pedals are probably more like chains and cassettes, they wear out, are consumable.
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Old 12-07-16, 09:54 AM
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I had totally forgotten about this, until the replies popped up. Whatever the problem was, it was something with the pedals. I ended up swapping them out for another set of pedals, and the problem went away.
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Old 12-07-16, 10:16 AM
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glad it was the pedals (and fixed) -- for posterity, I had a similar situation but it wasn't the pedals: it was a loose bottom bracket (square taper cartridge) ...
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