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Thorn 104/64 PCD Triple Crankset MK2 - Black

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5 / 5| Write your review
£49.99
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Details
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Product Reviews (1)
Questions & Answers (16) Q & A
Details
Alloy forged crank arms
BCD: 104/64mm
Sand blast black finish
JIS Square Taper
110mm bracket required to get a 54mm chainline on middle ring, 107mm can be used if only using a single ring in the outer position.
Weight: 565g (150mm)
Specification
Downloads
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Product Reviews (1)
Overall Product Rating 5 / 5
Excellent
By
04 Nov 2016
5 / 5
I recommend this product
ConsA touch heavy
ProsLooks good, rides nice
Strong build so not the lightest but this seems a very well made crank for the money.
Questions & Answers (16)
Crank Length
By
03 Aug 2016
My daugther is 8 years old and she is 132cm tall. Wich cranklength should i use?
And is a singlespeed 30T (104bcd) a good option with a 12-27 or 11-32 9sp?
SJS Customer Service:
Hi,

Crank length is as much personal preference as it is a recommended length based upon height. Based on a quick calculation from a bike fitting company would give a 130mm crank length which is unfortunately not available, because of this we'd probably recommend just going for the 150mm option which will be suitable for a longer period anyway. A 1x9 set up would be a good option as well.

Thanks.
Can This Crank Used With Double Chainring? What Is The Compatible Bb With Double Chainring?
By
06 Jun 2016
None
SJS Customer Service:
Hi,

You could use this crank with just two chainrings if you wanted to. The suitable bottom bracket will depend on the chain line you're looking to achieve and if you are going to mount the two chainrings on the inner and middle position or the middle and outer position.

Thanks.
Are These Compatible With My Chain Rings And Bb
By
18 Mar 2016
I want shorter cranks on my road bike (originally shimano gears). Would these be suitable with 30/42/52 chainrings and a BB UN26 (113)

cheers!
Jx
SJS Customer Service:
Hi,

This crank set can only take 104BCD 4 arm chainrings, most of Shimano's road chainsets use 110BCD or 130BCD and have 5 bolts meaning that the chainrings won't fit with these Thorn crank arms.

Thanks.
Do These Cranksets Come With The Spline Or Are They Just Crank Arms?
By
15 Mar 2016
SJS Customer Service:
Hi,

These are just the crank arms, as they are designed for a square taper bottom bracket the axle that connects them is part of the bottom bracket.

Thanks.
I Am Building A Rohloff/Gates Drive Touring Bike With 68 Mm Bb. Will Y
By
22 Jan 2016
Will your MK2 triple give me the critical 54 mm chain line with a shimano Un 55 with 107 spindle if I use the outer position on the crank. I do not intend to use a chain guard

Thanks for your help

Mark fishler
SJS Customer Service:
Hi,

When using a 107mm bottom bracket the outer ring position does have a 54mm chainline required for use with a Rohloff.

Thanks.
Q Factor And Narrow Bb?
By
17 Dec 2015
What would be the Q factor (outside to outside) on a 107mm BB?

It is mentioned 107 is the minimum recommended with 1 ring in the middle position, is that due to frame clearance or some other reason?
SJS Customer Service:
Hi,

With a 107mm bottom bracket and the 170mm version of the cranks, the Q-factor measures at 180mm. When run with a 107mm bottom bracket you can only fit a chainring to the outer position because of frame clearances.

Thanks.
Chainline (Again)
By
24 Oct 2015
Hello, I've read previous questions and responses on this but am still confused. You've written that the lowest (smallest?) chainline possible is 52mm using a 107mm BB in a 68mm BB shell. But is that 52mm counting on using one, two or three ring? I am building a 26" wheel bike for my son using a standard 135mm Deore rear hub and a 10 speed XT cassette. Does that info already decide what chainline I need?
I want to set up the bike with a single chainring, either a 28T on the 64 and bash on the 104, or a 30T on 104. Is this going to work properly? As you can probably tell, I'm using my son as a guinea pig for my first ever build!
SJS Customer Service:
Hi,

This 52mm chainline would be for a chainring mounted on the middle ring position. This would be a suitable chainline if you had the chainring in the middle position, if you do mount the chainring on the inner position they you may require a slightly longer bottom bracket but this is not something we have ever tried so i can't say for sure I'm afraid.

Thanks.
Compatibility
By
10 Oct 2015
Hi
I'm build thorn nomad mk2 with s&s. Just want to make sure that is this crankset compatible with the frame above and this chainring ?
http://www.sjscycles.co.uk/thorn104mmbcd4armreversiblesinglechainring332inchblackprod11054/?showsku=11054s40

and also with one chainring bolts do I need to get for this set?

Thanks for help
SJS Customer Service:
Hi,

This thorn crankset is indeed compatible with the MK2 Nomad ad will happily accept that chainring. Any single ring specific chainring bolts will work with that chainset and ring, the basic Cr-Mo steel ones are SJSC part 27234.

Thanks.
10Speed?
By
16 Sep 2015
Are these cranks compatible with 10 speed chain rings?
I'm guessing the distances between chain rings should be a bit smaller on 10 speed?
SJS Customer Service:
Hi,

There is nothing stopping you putting 10spd rings on this crankset, these cranks are perfectly compatible with 10spd chainrings. Most chainsets use chainring tabs that are a standardized size, the difference between 9 and 10spd would be taken up within the rings themselves although there is actually very little difference between 9 and 10spd rings.

Thanks.
Please Can You Recommend A Bottom Bracket For This Crank
By
09 Sep 2015
i am building up / assembling parts for a bike for my daughter. the frame is an on one inbred, bb spec = 68mm, English threaded . i guess i am looking for a 68 / 110 mm with a JIS square taper? am i on the right lines? looking for something lightweight + good value.
thanks


SJS Customer Service:
Hi,

You are correct, a 68/110mm JIS bottom bracket would be the one that you require. We normally recommend the Shimano units, the 68mm versions are SJSC part 26972, just select 110mm from the drop-down menu.

Thanks.
Would This Be Compatible With A 7 Speed?
By
21 Aug 2015
SJS Customer Service:
Yes it would be fine.
Do These Come With Self Extracting Bolts? Can I Buy Spar
By
06 Aug 2015
SJS Customer Service:
Hi,

These cranks come as pictured so do not include self extracting bolts, so these will have to be purchased separately.

Thanks.
Hi
By
09 Sep 2014
If a 110mm bracket is required to get a 54mm chainline, which lenght do i need to get a 50mm chainline?
thank you
SJS Customer Service:
Hi,

The shortest bottom bracket we do would be a 107mm, but that would only drop the chainline to 52mm which is as close as you'd get with these cranks.

Thanks.
Hi. Which Bb Of Yours Do You Recommend With This Crank?
By
09 Sep 2014
And is it ok for 9 speed?

Thank you
SJS Customer Service:
Hi,

You could use any square taper bottom bracket providing you used the 110mm length. We would however recommend the Shimano UN55. Yes this crankset would be fine for use with 9spd chainrings.

Thanks.
What Else Do I Need?
By
01 Apr 2014
I just bought a second hand 2006 Gary Fisher Tassajara to my son and I am thinking of getting shorter crankarms. Currently DEORE hollowtech II crankset is fitted. Do you see any compability problems (frame/cranks/current chainrings) with getting these crankarms, and a UN55 73 mm/107 mm BB (current chainline seems to be 50 mm). Also I might suggest for him to convert to 1*10 by getting a 10 speed 11 36 casett and a new shifter. Would then the Thorn reversible single chainring 32T be appropriate?
SJS Customer Service:
Hi,

These crank arms will be perfectly compatible with that bottom bracket and that sounds like it should be fine for your frame also. If you convert it to 10spd the Thorn reversible chainring won't work as it a much thicker gauge, the 10spd chain would not fit onto it. You're better off going for a 10spd compatible chain ring, either the Race Face or the E13 rings would be suitable.

Thanks.
Chainring Bolts
By
28 Jan 2014
Do these cranks come with chainring bolts or not?
I'm matching them with http://www.sjscycles.co.uk/thorn104mmbcd4armreversiblesinglechainring332inchblackprod11054/?geoc=au&showsku=11054s36
SJS Customer Service:
Hi,

No I'm afraid this crankset does not come with chainring bolts.

Thanks.