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Thorn 104/64 PCD Triple Crankset MK2 - Black

Customer Reviews (6)

5 / 5| Write your review

£49.99

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Details

Alloy forged crank arms
BCD: 104/64mm
Sand blast black finish
JIS Square Taper
110mm bracket required to get a 51mm chainline on middle ring, 107mm can be used if only using a single ring in the outer position.
Weight: 565g (150mm)

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Product Reviews (6)

Overall Product Rating 5 / 5

Best crank for kids dh & enduro

By Peter levy

16 Jun 2022

5 / 5

I recommend this product

ConsSquare taper (but had no issues)

ProsTough and light

Trying to get my boy on a proper small adult bike but the adult cranks were too long and kids cracks were steel or made of cheese! The se are tough and light. Take the hits and look good on his BMC. Job done at a great price.

A great choice

By Chris Barrett

20 Oct 2021

5 / 5

I recommend this product

ConsNone

ProsCost, weight, strength,

I suffer from occasional knee problems and quadricep tendonitis so the the ability to fit shorter cranks at a price that doesn't make you cry is a great advantage.

Price worthy

By Mircea Abrahamsson

06 May 2020

5 / 5

I recommend this product

Strong robust stiff cranks. I really recommend this product

Well made, good product

By Lewis

18 Jun 2019

5 / 5

I recommend this product

ConsNone.

ProsGood value, good choice

It's good that these cranks at various lengths are available, with the emphasis now going onto compact doubles etc. I fitted shorter cranks, and my knees feel the difference. Well made, and only marginally heavier (with the cartridge bearing) than the Deore / EBB set they replaced. Excellent value - where sub 170mm cranks are available, they are often v expensive, great to see a wide range available here.

Fits Perfect The Purpose

By Juerg

02 Apr 2017

5 / 5

I recommend this product

Consno BB screws

High quality and good finish.

Unfortunately the BB screws where not included!

Excellent

By Tom

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 (10)

Rohloff Chainline

By Samuel Gamester

26 Jul 2023

Hi please clarify what length bb spindle is required to give 57mm chainline with single chainring in outer position?

SJS Customer Service:

107mm gives a chain line of 51mm to obtain a chain line of 57mm you will need 119mm SK 27/07/23

crank extractor tool

By Naomi Crosby

19 May 2020

which crank extractor tool should I use with this? I have bought a Parktool CCP44 tool but think it is the wrong thing

SJS Customer Service:

Hi, you need a Park Tool CWP-7 Crank Puller for Square Taper & Splined Cranks or Shimano TL-FC10 Crank Extractor / Puller. The tool you have is for splined bottom brackets. Thanks

Is this a suitable replacement for a Hollowtech FC-M510 crankset ?

By Tony Dewdney

20 Aug 2017

I've got a Thorn Adventure circa 2002 from new, derailleur gears, hollowtech FC-M510 cranks. A small amount of play has developed between the spider and crank on one of them. Can you still get hollowtech M510 cranks or do you have to getv this one now ? The BB's are still good (UN52's) but these don't seem to be available now either, is the UN55 a direct replacement?

SJS Customer Service:

Hello,

Unfortunately you can not get hollowtech M510 cranks any more so you would have to get this one. Also the UN55 should just be a direct replacement.

Thanks.

Can This Crank Used With Double Chainring? What Is The Compatible Bb With Double Chainring?

By Anonymous

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 Jacqueline Willis

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.

Q Factor And Narrow Bb?

By CW

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.

10Speed?

By arvidnl

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 john kennedy

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.

By Leonardo Pieri

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 Leonardo Pieri

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.