surly ict emotor convert

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marekhlina   1 µW

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surly ict emotor convert

Post by marekhlina » Nov 08 2019 4:11am

Hello guys,

is it mission impossible to mount a motor to this beast?!?...surly ICT 132mm BB / 150x15 front axle, 197x12 rear axle..any advice would be very much appreciated!!!

https://photos.google.com/share/AF1QipM ... ZTVmc3MjRB

https://www.tritoncycles.co.uk/frames-f ... set-p17173

https://www.youtube.com/watch?v=mriO7EXHRpM

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dogman dan   100 GW

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Re: surly ict emotor convert

Post by dogman dan » Nov 09 2019 7:56am

The seller I know of that has mid drives for fat bikes has a 120 mm bottom bracket kit, but not one in 133mm.

So I would start looking for fat tire, rear hub motors with long enough axles for your bike. If that cannot be found,,,


One US seller has a fat wheel kit, but again, not as fat as your bike rear width. You could build a dropout plate ( torque arm plate) to attach to your frame, which would make the width narrower, and the bike a few inches longer. Basically, a piece of metal that bolts to the inside of the rear dropout, creating a new narrower dropout just behind the original one that is narrower. New disc mounts would be part of the plate on the left side.

Another option would be bend the frame back in some, but I would hesitate to do that to a frame that nice.

2old   100 kW

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Re: surly ict emotor convert

Post by 2old » Nov 09 2019 9:29am

Doug at CA bike used to machine BB parts to extend a 68 - 73 BBS BB ot "fat bike" width. Maybe he can machine something to take a 120 to 132.

marekhlina   1 µW

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Re: surly ict emotor convert

Post by marekhlina » Nov 09 2019 1:02pm

talked to Doug / US guy/yesterday...min. production is 100pcs....in general it is doable...obviously can't pay for 100pcs...

Balmorhea   100 W

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Re: surly ict emotor convert

Post by Balmorhea » Nov 09 2019 1:36pm

If your bike has MDS dropouts with replaceable plates (newer ICTs do not), it should be relatively easy to modify a pair of those, adding material to the inside surface, for somewhat narrower hub spacing. You could integrate a nice torque arm in the process.

By "relatively easy", I mean it would be a machining and welding project with demanding precision requirements. But gratifying if you can make it happen.

marekhlina   1 µW

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Re: surly ict emotor convert

Post by marekhlina » Nov 09 2019 2:01pm

would like to keep 2xl snowshoe tires...so don't want to change MDS dropout ...https://photos.google.com/share/AF1QipM ... ZTVmc3MjRB

[youtube]https://www.youtube.com/watch?v=x7btX4_ ... e=emb_logo[/youtube]

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