What derailleur ?

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Tomtom81

New Member
I have a Btwin Rockrider 520 but it's missing the deralieur, can anyone help me please and let me know what I need to replace it?
 
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vickster

Legendary Member
Like this?
Spec says... https://www.decathlon.co.uk/p/27-5-mountain-bike-st-520-v2/_/R-p-324884
-MICROSHIFT RD-M46-L rear derailleur
But would think something like an 8 speed Shimano would do too, eg https://www.decathlon.co.uk/p/7-8-speed-rear-derailleur-acera-m360/_/R-p-X8303023?mc=8303023
You might need a hanger too, best ask in Decathlon (and about the derailleur while you're there)
 

Cycleops

Legendary Member
Location
Accra, Ghana
Te Acera should be fine. Anything else missing? Are the cable and housing intact.
Might be an idea to replace the cable anyway. You’ll need a small cross head screwdriver to remove the shifter cover to thread it in from there and an Allen key to secure it to the derailleur. Follow one of the videos on youtube for adjustment.
 
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