Which crankset?
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Discussion

13aines

Original Poster:

2,209 posts

178 months

Sunday 5th February 2017
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Hi all,

Today my friend reversed into a post with my bike on the back of his car, and bent two of my chainrings.

I have a 2015/2016 (unsure) Rockhopper Sport, with Shimano Acera rear mech (9 speed) Altus front mech, and Specialized Stout chainset. Bottom bracket spindle is square-tapered, 118mm, and has a 73mm bottom bracket shell.

I am struggling to find a replacement chainset.

A guy in Halfords said to get a FC-M3000 (from Tredz - haha!) but not the Octalink. Turns out the one on Tredz is only Octalink. I found the FC-M371 but it seems that is for a 113mm bottom bracket? Looking at the 2016-2017 Shimano Products compatibility information PDF all I can see with respect to 118mm BB is Octalink related.

I could however replace my bottom bracket, but it's near new, and I think it's an UN55, which I read is better than a UN26, which offers more crankset options. Tool arrives tomorrow to pull it out...

I'm at a complete loss here - any help would be hugely appreciated.

Edited by 13aines on Sunday 5th February 23:25

Jimbo.

4,213 posts

218 months

Monday 6th February 2017
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If it's just the chainrings which are bent, just replace those.

13aines

Original Poster:

2,209 posts

178 months

Monday 6th February 2017
quotequote all
Unfortunately upon dismantling I found could do with a new bottom bracket too, so I have ordered the Deore M590 chainset for £49 smile