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Shimano Deore XT FC-M8120-1 Crankset 165mm - no chainring
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Deore XT FC-M8120-1 Crankset

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Backorder: This item is currently out of stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.


The SHIMANO DEORE XT FC-M8120-B2 crank features entirely new construction, using direct mount chainrings, special gear tooth profile for improved chain retention, and a 178mm Q-factor.


  • Special MTB gear teeth profile improves chain engagement and retention
  • Hollow forged crank maximizes power transfer while limiting weight
  • Superior chain retention
  • Rigid and lightweight design for aggressive trail riding
  • Q-factor: 178 mm
  • Chainline: 55 mm
  • Weight: 616 g (28T), 630 g (30T), 628 g (32T), 642 g (34T), 660 g (36T)

  • B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.


    Model Number: FC-M8120-1 


    Series: SHIMANO DEORE XT M8100 Series 


    Weight: 660 g (36T), 642 g (34T), 628 g (32T), 630 g (30T), 616 g (28T) 


    Chainline: 55 


    Chain ring combination: 28T, 30T, 32T, 34T, 36T 


    BB Compatibilty: Outboard 


    Compatible chain: HG 12-speed 


    Crank Arm Length: 165 mm, 170 mm, 175 mm, 180 mm 


    Gear arms: 


    P.C.D.: Direct 


    Rear Speeds: 12 


    Threaded BB Shell Width: 68 mm, 73 mm 


    Q Factor: 178 mm

    165mm - no chainring

    Mfg PartNum: IFCM81201AXXT 

    170mm - no chainring

    Mfg PartNum: IFCM81201CXXT 

    175mm - no chainring

    Mfg PartNum: IFCM81201EXXT 

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