Thorn Double Drilled Crank Arms 115 mm / 140 mm X-Over for Rear of Tandem - Black - 104/64 + 104

£69.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
- Compatible with JIS square taper bottom brackets
- Two pedal positions available at crank length 115 mm or 140 mm
- For use at rear of tandem
- Four arm cranks
- Black
- Q-factor 90mm left and right when used with a 110mm bottom bracket

Designed for child use only.
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Questions & Answers (5)
What is the danger of using this with a small adult rather than a kid?
12 May 2024
In the description is states that this is for kids only. I am in need of a short stoker crankset for a small adult. What is the danger of using it in this situation?
For any information or advice on any of Thorn bikes, frames and forks or parts, please contact our dedicated Thorn bikes sales team either on 01278 441505 or [email protected] and they'll be able to provide you with all of the information you need.
Are these available with a plain arm?
16 Jul 2023
Hello & thank you for your enquiry.
The arms are branded as per website image.
Kind regards, Pc 17/7/23.
What's the Q-factor of these cranks?
17 Apr 2020
Q-factor 90mm left and right when used with a 110mm bottom bracket RT 23/04/2020
104 BCD?
14 Apr 2019
Hello, just to confirm the outer two rings are 104bcd, please, and the inners 64?

Trying also to establish the Q factor with these cranks... thanks for your help!
Yes two outer rings of 104BCD and 1 inner of 64BCD.

Thanks - 15/04/19
Designed for triple at rear?
17 Dec 2018
Just checking these are designed for a rear triple on a tandem setup? Thanks
Yes, the left simply accepts the timing chainring and the right a triple chainring set up.

Thanks - 17/12/18