This item may be available in a different size, colour, scent, version or platform. Click below to be directed to product options:
Stamped rings with shifting ramps
Square taper crank accepts 68x122.5 mm spindle
Shimano Reference Number: FC-M391
Shimano Acera crank sets feature replaceable chainring and shifting guides for better performance.
170-mm 48/36/26T 9 Speed
Most Helpful Customer Reviews
Five stars because the quality of the construction is excellent relative to the 39 USD that I paid. The FC-M391 is obviously strong, reasonably light given its steel chainrings and massive arms, shifts very well when matched with a suitable derailleur, and has replaceable rings. It's hard to expect anything more at its price level.
Don't let the "nine speed" designation of this crankset worry you if your bicycle has a seven speed rear freewheel. I'm using this FC-M391 with a "nine speed" FD-M591 front derailleur, a seven speed freewheel, and a 7/8 speed KMC Z-72 chain. Shifting is excellent.
You should download the three Shimano technical spec sheets for the M391. I've put the links in my own comment to this review.
The rest of this review is optional information that may be helpful to you.
THE PRODUCT BEING REVIEWED:
There are 32 permutations for the Shimano M391. I own the product in the silver finish, with 175 mm crank...
Works good and has a 44 tooth large ring so that's cool. I got the proper chain line on my trek using a 73x118 bottom bracket with a 2.5mm spacer on the drive side. The dark color of the arms is like a dark metallic gray, not black, it looks pretty cool.
Looks good on the rebuild of my old bike. The crank arms are a bit heavy, but that's to be expected at this price point. The good thing is that the outer ring is removable to accommodate a bashguard.
The authorised South African distributor of this product is under no obligation to honour the manufacture's guarantees/warranties or to provide after-sales service.
Please note that this item is imported from the USA, and is designed to be used in the USA. In addition, if the unit is powered it will come with a US plug and an adapter/transformer may be required. Please click here for more information on power requirements, or check with us if you are unsure or need any assistance!
Please also note that certain items cannot be imported, these include Alcohol, Animals, Batteries, Flammable Materials, Currency, Food, Furs, Chemicals, Explosives, Medications, Plants, Seeds, Supplements, Pressurized Cans, Tactical Equipment, Vitamins, Weaponry and Weaponry Accessories. In these cases, the item and information is displayed for reference purposes only. If you are not sure if we are permitted to bring an item, please send us an e-mail with a link to the item to confirm.
Please also ensure that you are ordering the correct item for your particular application as returns to the USA are costly. Product reviews are also provided for most of our items, which can give you a good idea for possible things to look out for and the quality of the item. By clicking Add to Cart, you are confirming that the item is correct and you accept the conditions listed here.