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Modding MTB shoe sole to fit Frog cleat...

1891 Views 8 Replies 6 Participants Last post by  oldskoolboarder
I have some older Nike shoes that don't quite fit my new Speedplay Frog Cleats. I'm prepared to shave/cut part of the tread to fit the cleat. However, I'm trying to find the best method to do this. I have a dremel-type sanding bit and my cordless hand drill. I did some initial sanding to see how easy it would be to start grinding down the sole. Unfortunately, the sole seems pretty solid, so it may take a while to get it right.

Any suggestions on tools and methods on how to do this? BTW, these are old shoes that'll probably get beat up during CX season so I don't mind doing the "surgery".
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I used a hot knife.

oldskoolboarder said:
I have some older Nike shoes that don't quite fit my new Speedplay Frog Cleats. I'm prepared to shave/cut part of the tread to fit the cleat. However, I'm trying to find the best method to do this. I have a dremel-type sanding bit and my cordless hand drill. I did some initial sanding to see how easy it would be to start grinding down the sole. Unfortunately, the sole seems pretty solid, so it may take a while to get it right.

Any suggestions on tools and methods on how to do this? BTW, these are old shoes that'll probably get beat up during CX season so I don't mind doing the "surgery".
I used a POS steak knife that I had heated with a gas stove. That knife cut an older Sidi sole like butter.
damion said:
I used a POS steak knife that I had heated with a gas stove. That knife cut an older Sidi sole like butter.
OK, that justifies my oddball idea that I've used for other decon. I was considering using a crappy soldering iron to melt the majority of the sole, then I can use the dremel to clean it up.
I used a box cutter type knife. I would think the dremel would just melt the rubber of the sole as it heats up? Let me know 'cause I'm about to get some new shoes and it sure sounds easier than hacking away with my knife.
I've had good luck using a dremel. The shoes I've shaved have had pretty soft soles though so I didn't have to work that long at it. I don't know how well a soldering iron would work unless you think the heat would destabilize the plastic/rubber enough to make it softer for the dremel.

Good luck.

BTW; are you using the new Frog II cleats? I was all set to grind away at my shoes and then realized they're slimmer so you don't have to grind at all...
oldskoolboarder said:
I have some older Nike shoes that don't quite fit my new Speedplay Frog Cleats. I'm prepared to shave/cut part of the tread to fit the cleat. However, I'm trying to find the best method to do this. I have a dremel-type sanding bit and my cordless hand drill. I did some initial sanding to see how easy it would be to start grinding down the sole. Unfortunately, the sole seems pretty solid, so it may take a while to get it right.

Any suggestions on tools and methods on how to do this? BTW, these are old shoes that'll probably get beat up during CX season so I don't mind doing the "surgery".
Use a scalpel or X-acto knife to score the rubber, then use some pliers to grasp the rubber and tug hard. It comes off really easily. I've found this method much better than my Dremel, since the rotor tool kind of melted the rubber into a toxic cloud that hurt my breathing.
will8250 said:
I've had good luck using a dremel. The shoes I've shaved have had pretty soft soles though so I didn't have to work that long at it. I don't know how well a soldering iron would work unless you think the heat would destabilize the plastic/rubber enough to make it softer for the dremel.

Good luck.

BTW; are you using the new Frog II cleats? I was all set to grind away at my shoes and then realized they're slimmer so you don't have to grind at all...
I was considering that. The unforunate thing is I can't find dimensions on either of the cleats to compare. How much smaller is the Frog II?
I use a burr bit on my Dremel: it's fast, accurate and easy. With a burr bit, you get cutting instead of melting like you'd get with a grinding/sanding bit.

The Frog II cleat is practically the same footprint. If you make your shoes fit the old cleat, they'll fit the new cleat. Mine do.
Thanks for the input. I'll try the carpet blade, see if that works. The burr bit sounds good too.

FYI, here's the input from Speedplay:

***
Hello,

Thank you for contacting Speedplay.
Original Frog cleats have an outer width of ~44 millimeters and the Frog II cleats have an outer with of ~39 millimeters.
If necessary, the shoe lugs can be trimmed to accommodate the cleat.
If we can be of any further assistance, please feel free to contact us again.

Sincerely,

Chan
Speedplay Customer Service
***
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