Shortening cranks
 

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[Closed] Shortening cranks

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Are there any products which can shorten a hollow11 crank to use on a kid's bike. I have a nice xt crank I want to use on a 24" kids bike but their a bit long...


 
Posted : 12/09/2016 8:48 am
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Highpath Engineering do crank shortening - [url= http://highpath.co.uk/crank-shortening/ ]Shorten your cranks here[/url] - Only works on solid cranks though.

They also make a crank shortening device, but it's a lot more pricey.


 
Posted : 12/09/2016 8:51 am
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Hollowtech2 cranks are hollow.
So no.

You'd have to drill and thread through the hollow bit.

Try Spa or SJS cycles for cheap, short, cranks.


 
Posted : 12/09/2016 8:51 am
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Read Chris Bell of Highpath's obituary recently, so don't know if anyone's continuing the business.


 
Posted : 12/09/2016 8:53 am
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Those Highpath ones are a bit pricey.

[url] http://www.dutchbikebits.com/crank-shortener [/url] has some cheap ones.

There was a woman who did the tour divide with shortened cranks this year - I think because of an injury.


 
Posted : 12/09/2016 8:55 am
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Seen the high path stuff but it needs the bolt on crank to work. She has a working bike just looking to upgrade it.


 
Posted : 12/09/2016 8:56 am
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lots of crank shorteners out there similar to the highpath ones. Google is your friend. always a bit of a bodge tho for example:

https://www.sjscycles.co.uk/componentstandem-specific-parts/thorn-crank-shorteners/

https://www.amazon.co.uk/Ride2-Crank-Shorteners-43mm-wide/dp/B002N2KJ7W


 
Posted : 12/09/2016 8:56 am
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I looked into shortening some cranks, then opted for these instead, square taper, 152mm, 4 bolt with a BCD to suit modern rings.

https://www.amazon.co.uk/Kettenradgarnitur-SR-Suntour-T20242-Z%C3%A4hne-schwarz/dp/B0029MP3AO


 
Posted : 12/09/2016 8:57 am
 nre
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I went with the Suntour option linked by QWERTY above, another option is the new SRAM NX cranks, available in 155mm (if 1x is your thing...)
https://www.sram.com/sram/mountain/products/nx-1x-x-sync-crankset


 
Posted : 12/09/2016 1:22 pm
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Read Chris Bell of Highpath's obituary recently, so don't know if anyone's continuing the business.

Oh no, he'd been ill for a long time but I didn't know he'd died. RIP Chris.


 
Posted : 12/09/2016 1:30 pm
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I had some non-hollow deore cranks, I got the back of the cranks filled in with weld. And then new tapped holes put in by 18bikes.

Not pretty, but it worked...

(Cranks now 140mm)


 
Posted : 12/09/2016 1:51 pm
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[url= http://spawncycles.com/ca/brood-eldorado-syx-156 ]140mm kids cranks[/url]


 
Posted : 12/09/2016 2:14 pm
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I also went for the suntour ones in qwerty's post. Nice little cranks for the money. I already had a bb and replaced the rings for a single NW. Seem to work nicely on my lads bike.


 
Posted : 12/09/2016 2:23 pm
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I shortened a pair of Deore (LX I think) from 175mm to 150mm. I don't think they were the hollow type. They are not going to see the load they were designed for originally so I wasn't worried that the re-tapped holes went into a recess on the back face. 85% of the original depth was there, I filled the area with isopon to avoid a snag. No fancy tools, just a pillar drill, pair of Park Tools taps, hacksaw, file and emery.

[img] [/img]


 
Posted : 12/09/2016 4:09 pm
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Zee cranks can be shortened as they arent hollow 😉


 
Posted : 12/09/2016 4:58 pm
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Mike Burrows used to do them, don't know if he still does.


 
Posted : 12/09/2016 5:50 pm
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I went for the suntour cranks that Querty linked to above. Once you've binned the heavy steel rings and replaced with a NW single, theyre a pretty good weight.


 
Posted : 12/09/2016 5:54 pm
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i have a set of taps and a vertical milling machine if anyone wants a set done. im in essex


 
Posted : 12/09/2016 6:00 pm
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I've use the SJS cranjk shorteners on my kiddyback tandem for years. They are great, but for permanent single bike solution, I'd look elsewhere to be honest.


 
Posted : 12/09/2016 6:11 pm
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I bought these, to use with a single chainring, for my lads bike:
https://www.sjscycles.co.uk/cranks/150-thorn-10464-pcd-triple-crankset-mk2-black/

Apart from needing a tapered BB it's pretty good.


 
Posted : 12/09/2016 6:35 pm
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Profile Race cranks in short length 145mm with threaded Euro BB and suitable spider/ring combo


 
Posted : 12/09/2016 7:12 pm
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i have a set of taps and a vertical milling machine if anyone wants a set done. im in essex

I do it with LASERS 😀

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Posted : 12/09/2016 10:15 pm
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Posted : 13/09/2016 6:32 am

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