قوس سفلي لمجموعة التروس 7 ، 8 ،9 سرعات

Package as required, allowed me to increase the rear cogs as close spaced ring chain

I bought one of these in November 2020 for my Specialized Hardrock. lI have had to replace the middle chainring after only 2,500km, admittedly a tough 2,500km with lots of climbs. But this chainring lasted only as long as the chain, which is not what I would have expected. In its favour, at least the chainrings are replaceable.

Seems OK but does not fit the rockrider 520 mtb. As it was the only decathlon brand available I thought it would make sense for it to fit their own brand bike but obviously not. The set is for a narrower bike as it makes it impossible to shift to the largest crank as it sticks out too far. Waste of money.