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Old 01-05-11, 09:52 AM   #1
xfimpg
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Can you shim an SPD cleat?

I need to correct a .5" leg length discrepancy.
Has anyone ever successfully shimmed an SPD cleat?
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Old 01-05-11, 10:08 AM   #2
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I have but never that much 1/2 is a good size shim. I made mine out of some aluminum.
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Old 01-05-11, 10:33 AM   #3
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I have but never that much 1/2 is a good size shim. I made mine out of some aluminum.
I'm thinking for .5" it would be .25" given the pedaling radius.

Do your shoes still contact the pedal or do they wobble a bit because they are slightly elevated by the shim?
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Old 01-05-11, 11:16 AM   #4
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I'm wondering if you'd have better luck sticking a heel raise in your shoe. Something like this. A podiatrist or PT might be able to get you something the right height. 0.5" is pretty substantial though, and I'd be concerned as to how your Achilles would respond to constantly being in a shortened position. Also, your shoe might not be deep enough. What if you went with a small heel lift and a small shim? That would make the Achilles issue less prominent and would eliminate the need for a huge shim.
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Old 01-05-11, 11:56 AM   #5
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what about a shorter crank arm for that side of the bike? like a 170mm on one side and a 175mm on the other?
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Old 01-05-11, 01:34 PM   #6
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The problem with a shorter crank arm is it's shorter at the top of the stroke too.
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Old 01-05-11, 02:11 PM   #7
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I'm wondering if you'd have better luck sticking a heel raise in your shoe. Something like this. A podiatrist or PT might be able to get you something the right height. 0.5" is pretty substantial though, and I'd be concerned as to how your Achilles would respond to constantly being in a shortened position. Also, your shoe might not be deep enough. What if you went with a small heel lift and a small shim? That would make the Achilles issue less prominent and would eliminate the need for a huge shim.
I'm currently using the Shimano M086 and I would say they don,t have a deep heel. It is something to think about though.
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Old 01-05-11, 02:17 PM   #8
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what about a shorter crank arm for that side of the bike? like a 170mm on one side and a 175mm on the other?
I tried the shorter crank arm last summer (all summer long to be exact) and it caused me problems in my hip joints when I started running this fall because my shoes are standard and not modified leg-length discrepancy.
It was actually painful enough to stop running altogether and simply stick to the stationary bike and this absolutely cruel thigh buster of a machine:

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Old 01-05-11, 03:59 PM   #9
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I'm thinking for .5" it would be .25" given the pedaling radius.

Do your shoes still contact the pedal or do they wobble a bit because they are slightly elevated by the shim?
Not really but it was only shimmed a little over a 1/8. We did it for a friend of mine and he was happy with it.
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