Part 1: Deore M5100 SHIMANO Cranks any Good? Versus 12 speed Deore M6100 Quick Check

Cheap but more versatile? Shimano makes Deore cranks for 11 and 12 speed. Here's the #Shimano #Deore #M5100 compared with the rest of the Shimano 12 speed, Hyperglide Plus or HG+ cranksets. Part 2 of the Deore M5100 drivetrain coming soon, covering the 11-51T cassette vs Deore M6100 10-51T.

Videos I referred to

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➜Cranks and chainrings

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⌚Chapters
0:00 Intro
00:27 Same crank for Deore 10-11 speed?
01:04 Deore cranks construction
01:41 Weight of the M5100 cranks
02:31 Deore 11 speed next to SLX 12 speed
03:01 M5100 Chainrings
03:39 Hyperglide, not Plus, compatibility
04:49 Deore M5100 crank advatages,
05:34 Chainline tips
06:07 Bottom Bracket compatibility, install
06:28 Should you upgrade? Compatibility
07:14 Deore M5100 Crankset Conclusions

My channel is not sponsored. All opinions are my own, 100% honest. Some of the links in this description are affiliate links. I'll earn a small commission if you make a purchase and it's no additional cost to you, I appreciate your support!

[Tuchh]

I'm brand new to "upgrading/servicing etc" a few weeks ago I spoke to someone at Sheffield Decathlon who worked at the bikeshop and he information bombed me when I was looking for a new suntour crankset as my pedal had fell off and couldn't find any online as I thought I needed the exact same one, he explained so many options and showed me examples of what people used for trail riding and the huge cassettes which I didn't know was a thing etc. So when i got home i researched.. alot. My voodoo hoodoo was a 3x9 shimano alivio groupset but now i run a 1x11s (11-51t) deore m5100 groupset, 32teeth 175mm crankset using a bb52 bottom bracket, a 150mm dropper seat I internally routed by drilling my frame once, new brake pads and I bled my own brakes and fitted the groupset.. I also replaced my freehub as that had massive play. I replaced both bearings and bearing cups in my headset along with the crown race and opted for new sealed bearings and better cups.. isn't the Internet a wonderful place for newbies like me to do everything! Last month I thought a bike was a bike. Now I feel like I know so much! Haha. Hardest part was the rear derailleur adjustment BUT I recently bought a bike stand for £30 and it took me 1 try to dial it in today, having to either flip the bike over or lift the bike to pedal it to adjust a derailleur is so hard as a newbie. Thanks for reading, I felt like sharing haha.

[elononoras]

Got myself a FC-M4100-2, it's a regular chain line out of the box. Sold the 36/26 chainrings, replaced with narrow-wide. Works great and it's a bargain.

[SgtFinaldo]

Running 5100 on my 1 X Shimano 105 commuter mtb. Irish coas here, so didn't want hollow tech as possible failure due to water ingress over time. Weight penalty is minimal.
Running a 36t TA Specialties chainring. Very solid.

[AltitudeAerials]

Very detailed video! Thank you for this.. been using that 5100 crank for about a couple of years now without issues. Was planning to upgrade to the 7100 slx cranks but keep my 11spd 5100rd and m8000 shifter. Didn't realize that slx 12 spd chainring might have problems if I used it with the 11spd rd/cogs.

[mcsweeneys]

I just bought me a set of SLX 7100 for a new built. Will finish them with an aluminium chainring. Best bang for the buck in my book.

[davidh]

Great pickup about old 135mm and 142mm through axle non-boost chainlines. I've found the cheapest option for a correct chainline, is to find an old 3x (NOT 2x) shimano crank from the 9 speed or 10 speed days with 104BCD. Then install a wolftooth etc narrow/wide chainring on the middle mount. This gives a perfect 49mm chainline. You can buy both 10/11 or 12 speed chainring options in alloy and steel from wolftooth or others.

[mtbbiker]

I've been running Shimano M5100 groupset for about 1 year now. No problems. Just wish Shimano did not abandon non-boost chain lines. I was able to reduce chain line from 52mm to 49.5mm by swapping one 2.5mm bb spacer to non-drive side. I have also used chainring spacers with longer 16mm chainring bolts to reduce chain line. I recently purchased SRAM SX DUB crankset for another budget build that I plan to pair with M5100 cassette/Derailleur. Honestly the SRAM SX DUB crank is little lighter than the M5100 crank, has direct mount chainring and offered in chainrings offsets for non-boost (49mm) and boost (52mm). Seems like SRAM did their homework with the DUB system. Hopefully the 28.99 aluminum spindle holds up as well as Shimano's 24mm steel spindle.

[jasonkatz]

Terrific video and series. Simplifies compatibilty issues so much.

[kisilvan]

Great timing. Just ordered one of the 5100 cranks to upgrade my old triple chainset xc bike. 🙂

[colinl]

I have the 5100 cranks on my 1x conversion. Was actually available at the time and a bit cheaper. No problems with 141 boost using the BB spacer/s. I used MT800 BB as preferred black to grey. Sunrace 11-51 cassette, but also have a Shimano 5100 to try with second wheel. Thinking 34 tooth front for more on road downhill speed too.

[tonyb]

I am testing a 5100 cassette on my 2018 Trance with an SLX 11 speed drive just to get that better 51 tooth climbing gear, and so far I like it. Just a bit more weight in specs but I really only notice the better climbing and not the weight at all.

[polishguywithhardtospellna]

Starting from SLX Shimano provides stainless steel bolts in many of their parts, which is another bonus when spending bit more. Especially as you do need to service cranks, thus using crank arm bolts on regular basis. Same goes in rear derailleur, where small allen key needs nice, u corroded allen head, not to strip it. Although adjustment doesn't require much torque

[kevinborovsky]

As always great and most informative video. The best on YouTube for sure. I went Deore 12 speed on my recent build and they work excellent for me. How has the riding been this season so far?

[markjmaxwell]

Engineering and materials science does not lie.
I like an all steel 11 speed rear cluster and front chainring or chainrings they last very well.
The great thing about the M5100 is it was designed for a single and double front chainring.
The M5100 rear derailleur has jockey wheels that can be upgraded to XTR bearing jockey wheels and also has a clutch.
The latest Deore equipment has all bases covered for reliable long lasting performance....
The move to 12 speed has not been well liked by many people for good reason.
The 10 to 51 rear cluster holds no interest for me.
Once you start using exotic and light weight materials and make things thinner and much lighter the life of the drivetrain is reduced which is okay if you replace parts all the time.
But for the normal rider a half a kg weight reduction in not relavent but a reliable long life

[ajsludge]

I’m using an m8120 crank/chainring with a 5100 cassette, shifter and derailer. Ready for future 12 speed upgrade.

[christeschke]

Still running the 600 series Deore 2x10 on my old devinci hardtail. Not as light as the better ones, but good value and reliable, good enough to get 6th place in the Paris 2 Ancaster Gravel race ( on a mountain bike, clydesdale category) :)

[pacosenderos]

Buen video. Muy buena informacion sobre las lineas de cadena . Enhorabuena !!!

[stak]

Hi, do you know if i could use 12s SLX 7100-1 crank and 12s SLX chainring with 11s M5100 derailleur, cassette, shifter and XT 11s chain ? Thanks

[lcc]

i was running the new deore m615 brakes and there good....not bike park good but good enough on the second bike, the trickle down tech that shimano offers makes Deore or SLX good enough for 99% of mtb'ers it's mostly marketing that puts people off buying those group/parts, i've no issue running slx cranks the deore 615 out for the hope for the trip i'm taking

shimano have lowered the price of there xt 8000 range in new stuff on the way, think i seen somewhere it's a colour change...there making a steel/grey look range

[tommyvercetti]

My 5100 crank arm fell off my brand new bike after 2 weeks of use. I got it on and re tightened. Looked like no damage to the splines. I'm just hoping whoever assembled my bike just did it wrong and it's not a sign of things to come.