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Shun Alloy 104 PCD 4-Arm Freewheeling Cranks - 170 mm - Silver

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Questions & Answers (4) Q & A
We stock this for tandems (although there may well be other applications), this can only be used on tandems with hub gears and straight through drive, allows the rider (front or rear or both) to independently freewheel. Requires a very long bottom bracket, when fitted to a Thorn Raven Twin tandem (these use 73mm bottom bracket shells) the only bracket we've found to use is a cup and cone type. Bracket, item # 22175, cups item # 22176. Please note, this adaption is a great low cost improvised solution to allow people who may otherwise not still be able to cycle to get out on a bike.

- Freewheeling crank is on the RIGHT side - only suitable for 'Through-drive' (timing chain on right side of bike). Therefore best suited to tandems running hub gears.
- Fits JIS taper bottom brackets
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Questions & Answers (4)
Just Wondering Why These Can Only Be Used For Hub Gears?
02 Dec 2015
SJS Customer Service:

We're only referring to tandems with hub gears, as this normally allows for a through drive system. A solo bike normally has a much higher quality freewheel as part of the hub and only the one set of cranks so does not normally require a second freewheel. That said, there is nothing stopping you fitting these to a normal bike if you wanted to.

Can These Cranks Be Made Up As A Tripple Chain Ring
25 Feb 2015
SJS Customer Service:

This can only be used on a double or single chainring set up, unfortunately there is no way that it can be used for a triple chainring set up.

Regards, Jamie
Shun Freewheelng Crank
07 Jan 2015
Is this only available for right side installation, our tandem has left side timing cranks so would not work unless made for that side.


SJS Customer Service:

Unfortunately these freewheeling cranks will only work on the right hand side of the bike.

What Is The Specification Of The Freewheel Used?
15 Jun 2014
BCD of the bolts?
What bolts/thread ?
Do you sell the freewhells separately too.
I need this crank + 3 freewheels
SJS Customer Service:

These cranks take 104mm BCD chainrings. Any standard chainring bolts can be used with these cranks. Unfortunately the freewheels are not available separately.