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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 (3)
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