Shimano FC-M8100 XT 12-Speed Crankset Part of Shimano’s evergreen XT mountain bike groupset, the FC-M8100 12-Speed Crankset offers low weight, high strength and great durability, making it perfect for performance off-road riding. Suitable for use with single-ring 12-speed drivetrains, it has a 52mm chain line that can be used with 142mm and 148mm rear axle spacing. The oversized axle and wider bearing spacing provide good rigidity for better power transfer and improved bearing life. Compatible with Shimano 12-speed Dyna-Sys DCE single chainrings.
Shimano FC-M8100 XT 12-Speed Crankset Part of Shimano’s evergreen XT mountain bike groupset, the FC-M8100 12-Speed Crankset offers low weight, high strength and great durability, making it perfect for performance off-road riding. Suitable for use with single-ring 12-speed drivetrains, it has a 52mm chain line that can be used with 142mm and 148mm rear axle spacing. The oversized axle and wider bearing spacing provide good rigidity for better power transfer and improved bearing life. Compatible with Shimano 12-speed Dyna-Sys DCE single chainrings.
Shimano FC-M8100 XT 12-Speed Crankset Part of Shimano’s evergreen XT mountain bike groupset, the FC-M8100 12-Speed Crankset offers low weight, high strength and great durability, making it perfect for performance off-road riding. Suitable for use with single-ring 12-speed drivetrains, it has a 52mm chain line that can be used with 142mm and 148mm rear axle spacing. The oversized axle and wider bearing spacing provide good rigidity for better power transfer and improved bearing life. Compatible with Shimano 12-speed Dyna-Sys DCE single chainrings.
Shimano FC-M8100 XT 12-Speed Crankset Part of Shimano’s evergreen XT mountain bike groupset, the FC-M8100 12-Speed Crankset offers low weight, high strength and great durability, making it perfect for performance off-road riding. Suitable for use with single-ring 12-speed drivetrains, it has a 52mm chain line that can be used with 142mm and 148mm rear axle spacing. The oversized axle and wider bearing spacing provide good rigidity for better power transfer and improved bearing life. Compatible with Shimano 12-speed Dyna-Sys DCE single chainrings.
Last updated at 03/21/2026 06:27:43
Shimano FC-M8100-1 Xt Front Crankset - 175MM
Free delivery between 26 Mar – 3 Apr
Shimano FC-M8100-1 Xt Front Crankset - 175MM
Free delivery between Wed – Fri
Shimano FC-M8100 Front Crankset Deore XT 175mm 12-Speed C/L: 52mm (Without Chainring & BB)
Free delivery between 23 Mar – 1 Apr
Shimano XT FC-M8100-1 12sp Crankset 175mm (no chainring)
Free delivery between Tue – Fri
Shimano XT FC-M8100 Front Crankset 175mm W/O Chainring And BB Chainline 52mm
14-day returns
Shimano XT FC-M8100-1 12S crank arms Length 175 mm
Delivery between Mon – Tue $39.18
Shimano Crank XT FC-M8100-1 without Chainring 12-Speed 175mm
Free delivery
Shimano Deore FC-M8100 XT 12-speed 52 mm 165 mm Crankset without Ring
Delivery between 27 Mar – 2 Apr $28.39
Shimano FC-M8100 XT Crank set without ring 12-speed 52 mm chainline 175 mm
Delivery $11.35
Shimano Deore XT FC-M8100-1 Crankset 175mm
Free delivery between 26 Mar – 3 Apr
originally posted on jensonusa.com
On a recent build with a 148 rear hub spacing, it was important to have the right chain line. These cranks made that happen. With so many numbers to keep track of, it is easy to overlook things. Like all shimano products installation was straight forward.
originally posted on jensonusa.com
These cranks look good and feel good for less $ than XTR. Running mine with a Wolf Tooth chainring and a Wheels Manufacturing BB, pretty stoked on the result. Solid and smooth feel with an easy install.
originally posted on bikeinn.com
This crankset is very much what you would expect from Shimano XT, great quality, nice appearance, strong and stiff, but a little heavy. This weighed 528g (without chainring) for my 170mm set. The XT 32T chainring adds an additional 115g.An important note!! The crankset includes the TL-FC41 tool for installation of the chainring lockring, so don't buy one separately like I did!!
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Shimano FC-M8100-1 Xt Front Crankset - 175MM
Free delivery between 26 Mar – 3 Apr
Shimano FC-M8100-1 Xt Front Crankset - 175MM
Free delivery between Wed – Fri
Shimano FC-M8100 Front Crankset Deore XT 175mm 12-Speed C/L: 52mm (Without Chainring & BB)
Free delivery between 23 Mar – 1 Apr
Shimano XT FC-M8100-1 12sp Crankset 175mm (no chainring)
Free delivery between Tue – Fri
Shimano XT FC-M8100 Front Crankset 175mm W/O Chainring And BB Chainline 52mm
14-day returns
On a recent build with a 148 rear hub spacing, it was important to have the right chain line. These cranks made that happen. With so many numbers to keep track of, it is easy to overlook things. Like all shimano products installation was straight forward.
These cranks look good and feel good for less $ than XTR. Running mine with a Wolf Tooth chainring and a Wheels Manufacturing BB, pretty stoked on the result. Solid and smooth feel with an easy install.
This crankset is very much what you would expect from Shimano XT, great quality, nice appearance, strong and stiff, but a little heavy. This weighed 528g (without chainring) for my 170mm set. The XT 32T chainring adds an additional 115g.An important note!! The crankset includes the TL-FC41 tool for installation of the chainring lockring, so don't buy one separately like I did!!
Been riding the Ibis Ripmo AF (SLX with 175mm cranks) for a bit now and even with sag set up nice and tight, I was still getting pedal strikes on some pretty standard and known trail sections. With the XT 165mm upgrade and new XT BB feels like my old bike with predictable clearance and no noticeable pedal stroke dynamic changes. Solid design, weight savings and ease of install. Did have to buy the Shimano pretensioner tool and the chain ring tool as well. But those were available for less than $20 for both. Overall very happy with the new set up!
Carbon cranks have always left me a little weary. I’ve had several friends break them. For this reason, I use the Shimano XT 8100 cranks. They are reasonably light for an alloy crank. The interface to install them is incredibly easy. I feel there is not enough of a weight savings to spend the money on XTR.
A set it and forget it crankset. Takes a beating and keeps on spinning. I've had XX1 carbon cranks and the XT is just more durable. Manufacturers are trying to convince the public that 30mm spindles are needed - they are not. Shimano 24mm is plenty stiff, even for a 200lbs rider pushing high torque (singlespeed application). 24mm also accommodates eccentric bottom brackets like Wheels Manufacturing and Niner Biocentric 30. Any easy pick and great value.
Shimano cranksets are by far the simplest to work on with the slight issue of needing a special tool (TL-FC41) to fit the chainring. This tool does fit hollowtech bottom brackets as well as compensation. Went for the on trend shorter 165mm cranks, time will only tell how get on with this. The only downside it the price compared to the SLX cranks, if only these did not have SLX printed largest size possible on them. So if you want a simple to use, understated and quality set of cranks then these are a god choice. Just make sure you torque up the bolts.
I love them, they look really slick on my bike. They have held up great so far blasting down rock gardens too.One thing I don't like is the protective film sticker that comes on the arms. Within an hour of the first ride it started peeling, and they don't come off clean. Took some rubbing alcohol to completely remove it. No big deal though.
It's XT. The hollow tech II construction is nice and light. If you've never tried a light crankset, you owe it to yourself to do so. These are roughly half a pound lighter than Shimano's current Deore cranks and you can tell it when you spin them.
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