Mirage CHILDREN'S Crank Shorteners - Silver - Per Pair

Customer Reviews (2)
5 / 5| Write your review
£25.99
was
£25.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
Details
The crank shortener makes a difference in length of 2.5 or 5 centimeters.

We do not endorse these for use by adults due to lightweight construction.

Mounting:

This set consists of blocks with left and right thread. Place the correct shortener on the crank and screw it tight with the stainless steel bolt. 3 sizes of Allen screws are included. Choose the right size and screw the bolts tight until the block can no longer move.

Place the pedals in the crank shortener at the desired height. If the thread of the pedal is longer than the thickness of the shortener, the spacers must be used.

Contains:
- 2 aluminium crank shorteners (left and right thread)
- 2 stainless steel bolts (left and right)
- 4 rings
- 4 Allen screws: 4 x 7mm / 4 x 11mm / 4 x 13mm

Suitable for:
- Pedals with 9/16 thread (most common)
- Width crank arm from 26 to 38mm
Product Reviews (2)
Questions & Answers (0) Q & A
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Product Reviews (2)
Overall Product Rating 5 / 5
Might be OK for adults
By Andrew Brooke
04 Apr 2026
5 / 5
I recommend this product
ConsMay not be robust enough for riders that "mash" their pedals.
ProsEffective, easy to fit, cheaper than the more robust Thorn crank shorteners, no heel strikes.
I bought these to shorten the cranks on my ICE recumbent.
SJSC clearly state that they are only for use by children, and I can see why they need to say this. However, I think (and hope) they are strong enough for adults that don't stamp on their pedals.
I originally bought Thorn crank shorteners which are very robustly engineered, but I got the occasional heel strike, not enough to make them unusable, but enough to make it worth trying these less bulky items.
They are as effective as the longer, stronger Thorn crank shorteners, and so far have been reliable over 100 miles or so. Although the instructions say to grease the threads, I did have one shortener loosen after about 30 miles, so I refitted them with a weak thread locker and have had no trouble since.
Excellent product
By Colin Richardson
26 Oct 2025
5 / 5
I recommend this product
Great quality item at a brilliant price.
Really easy to fit and the instuctions were clear and easy to follow,
Questions & Answers
If you have any questions ask here or phone 01278 441500 (+44 1278 441500).