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 20:19:15
Shimano XT FC-M8100 Front Crankset 165mm Without Chainring BB C/L 52mm
14-day returns
Shimano FC-M8100-1 Xt Front Crankset - 165MM
Free delivery between 26 Mar – 3 Apr
Shimano FC-M8100-1 Xt Front Crankset - 165MM
Free delivery between Wed – Fri
Shimano Crank XT FC-M8100-1 without Chainring 12-Speed 165mm
Free delivery
Shimano FC-M8100 Front Crankset Deore XT 165mm 12-Speed C/L: 52mm (Without Chainring & BB)
Free delivery between 23 Mar – 1 Apr
Shimano FC-M8100-1 Front Crankset XT, 165mm / 52mm
Free delivery between 24 Mar – 2 Apr
Shimano Deore XT FC-M8100-1 Crankset 165mm (without Chainring and BB)
Free delivery between Tue – Fri
Shimano XT Front Crankset 165mm W/O Chainring and BB
Free delivery between 26 Mar – 1 Apr
Shimano Deore FC-M8100 XT 12-speed 52 mm 165 mm Crankset without Ring
Delivery between 27 Mar – 2 Apr $28.39
originally posted on jensonusa.com
What more you can I say? It's Shimano. This is part of my 3x10 to 1x12 conversion. Conversion is completed and I couldn't be happier.
originally posted on jensonusa.com
Simple and smooth design that is nice quality. This is what I was looking for. Does need a specific tool for the chainring that was different than what I had but not a big deal.
originally posted on jensonusa.com
Full XT build - nice and clean. Retired bike mechanic here, decade and a half on wrenches in top pro shops, in 4 cities. Hard to beat in term of value among hollow aluminum cranksets. Made in Japan - speaks for itself. Well designed, beautifully manufactured, look good - love them!
| Compatible BB type | Outboard |
Shimano XT FC-M8100 Front Crankset 165mm Without Chainring BB C/L 52mm
14-day returns
Shimano FC-M8100-1 Xt Front Crankset - 165MM
Free delivery between 26 Mar – 3 Apr
Shimano FC-M8100-1 Xt Front Crankset - 165MM
Free delivery between Wed – Fri
Shimano Crank XT FC-M8100-1 without Chainring 12-Speed 165mm
Free delivery
Shimano FC-M8100 Front Crankset Deore XT 165mm 12-Speed C/L: 52mm (Without Chainring & BB)
Free delivery between 23 Mar – 1 Apr
What more you can I say? It's Shimano. This is part of my 3x10 to 1x12 conversion. Conversion is completed and I couldn't be happier.
Simple and smooth design that is nice quality. This is what I was looking for. Does need a specific tool for the chainring that was different than what I had but not a big deal.
Full XT build - nice and clean. Retired bike mechanic here, decade and a half on wrenches in top pro shops, in 4 cities. Hard to beat in term of value among hollow aluminum cranksets. Made in Japan - speaks for itself. Well designed, beautifully manufactured, look good - love them!
These seem lighter and all round better than the M8000 ones. direct mount chain ring fitting is great - buy the proper tool to fit this otherwise you may have a challenge.
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.
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!!
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.
These cranks aren’t fancy , but functional. Strong and lite. XT is the industry standard on my bikes. Can’t go wrong.
| Compatible BB type | Outboard |
