Thorn Tandem Crankset for X-Over Drive - Front - Black

Customer Reviews (2)
5 / 5| Write your review
£49.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
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- Left hand 104mm BCD crank
- Right hand crank without spider
- Alloy
- For front tandem use
- Square taper
Product Reviews (2)
Questions & Answers (3) Q & A
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Product Reviews (2)
Overall Product Rating 5 / 5
Good product for mid-motor on Tandem
By Cengiz
23 May 2021
5 / 5
I recommend this product
ConsShipping cost from UK to Switzerland was almost same as the product cost!
I installed them with Bafang BBS02B 500W mid-motor to a Racer 3000T Aluminum frame Tandem. I had to remove back Truvativ ISIS bottom bracket and crank-set.

Would be nice if:
1. the bottom-bracket mounting holes were in diamond-shape.
2. 20mm offset option on the left-crankarm with spider.

For the 2. problem, I ordered a pair of 20mm Bicycle Pedal Extenders from Aliexpress, waiting for them. I will install only the left one to compensate right-crankarm's offset issue...
Useful to install a mid motor on a tandem
By Clouclou64
15 Apr 2021
5 / 5
I recommend this product
It will be helpful to have an option for rigth arm with 20mm less offset. Impossible to find with square hole at 0 degrés.
Questions & Answers (3)
What is the Q-factor for the crank set? Thanks
24 Oct 2023
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.
What would be the length of the bottom bracket ?
29 Oct 2020
This very much depends on your frame, the OLD for the rear hub and the chainline you wish to achieve.

JK 29.10.20
1 x 9 single speed?
22 Jan 2019
Can I use this as the basis for a 1 x 9 single speed 104 b/pcd on MTB with 68mm English threaded BB please?
This one is for tandem. The chainring is on the left.
Hope that helps.