12 Speed CHAINLINE Explained - 52 vs 55 vs 56.5 mm, Shimano SLX M7100 vs M7120 Cranksets

🔥 SHIMANO 1x12 CHAINLINE EXPLAINED: 49mm vs 52mm vs 55mm vs 56.5mm [Crank Clearance & Fit Guide 2025]
Confused by chainline specs? This covers them all using the Shimano SLX M7100 and M7120 cranksets Tire clearance and install tips for 12-speed — works on Meta HT, full-suspension (Trek Fuel EX, Canyon Spectral), gravel, e-Bikes.
#Shimano1x12 #ChainlineExplained #52vs55mm #SLXm7100 #M7120Crank #MTBUpgrade #CrankChainline #TireClearance #1x12Crank #BikeGeometry
(Updated Nov 2025 – 196k+ views – still the #1 1x12 chainline guide!)

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⌚ Chapters
0:00 Intro – What is Chainline?
0:30 Shimano 12 Speed Cranksets
0:57 Basics: 49mm, 52mm, 55mm, 56.5mm
1:54 Bottom Bracket compatibility
2:15 Chainrings Compatibility
3:09 Crankset Details, Crank arms
3:44 SLX M7120 Unboxing
4:57 Q Factor, Spindle Dimensions
5:45 Installation Tips
6:30 55mm Boost Chainline
7:35 Conclusions

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➜Shimano, SRAM Drivetrains and Components - https://bit.ly/3Gqq7Z5
Shimano 12 speed Drivetrains - https://bit.ly/3koZpIK
SHIMANO Brakes, Pads, Tools - https://bit.ly/3ztmWwf

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➜Cranks and chainrings
SLX FC-M7100 Cranks - https://bit.ly/3kYkuaL
XT FC-M8100 Crankset - 170mm, 12-Speed - https://bit.ly/2TQBmnS
SLX 12 speed chainrings - https://bit.ly/34We1ax
absoluteBLACK Oval Shimano DM Chainring 32T, 3mm Offset for HG+ Chain - https://bit.ly/3ekyh9p
Wolf Tooth Elliptical Shimano DM Chainring 32T, Boost, 3mm Offset, for HG+ chain - https://bit.ly/2QnqyQ3

Shimano Chainring Lock Ring and Washer - https://bit.ly/3epmUfW
Shimano Crank Arm Preload Cap - https://bit.ly/3mM47OW
Shimano Clamp Bolt with Washer - M6 X 21 - https://bit.ly/2I48CFW

➜Bottom Brackets
Shimano Deore BB52B Hollowtech II English BB - https://bit.ly/2ZaZQx5
Shimano XT BB-MT800 English Bottom Bracket - https://bit.ly/2qAi2Mx
Shimano Deore XT BB-MT800-P Press Fit Bottom Bracket - https://bit.ly/2HVR3YM

➜Shimano 12s Chains
Shimano XTR CN-M9100 Chain - 12-Speed - https://bit.ly/32daIds
Shimano XT CN-M8100 Chain - 12-Speed - https://bit.ly/2lUhK4r
Shimano SLX CN-M7100 Chain - 12-Speed - https://bit.ly/3epqnv4
Shimano Deore CN-M6100 Chain - 12-Speed - https://bit.ly/34Yycoq

➜Tools
Shimano TL-FC41 Direct Mount Chainring Tool - https://bit.ly/32fWOHo
Park BBT-59.2 Bottom Bracket Tool, 41mm for MT800 BB - https://bit.ly/38p0dI7
Park BBT-69.2 Bottom Bracket Tool, 44mm for BB52 - https://bit.ly/2v4QIZ4
Park BBT-9 BB Tool Shimano Hollowtech II - https://bit.ly/2uNKcqv
Crank Preload Tool - Shimano P/N TL-FC16
BB Adapter Tool for MT800 - Shimano TL-FC24 or 25
Park Tool CWP-7C Universal Crank Puller - https://bit.ly/2MJe956
Park Tool CCP-22C Crank Puller for Square Cranks - https://bit.ly/33UHOxM
Park Tool BBT-22 BB Tool for 20-Tooth ISIS Cups - https://bit.ly/2Zav4V7
Park Tool Polylube 1000 Grease -https://bit.ly/2qy34qo
Stan's NoTubes Dart Tire Repair - https://bit.ly/2Lc6tWs

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