Shimano XT 12 Speed M8100 - Updating an old bike | Worth it? Part 2 

See part 1 here ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-xpFVKstSaW8.html

Great video. I agree that going to 1X12 doesn't really make pedaling uphill any easier, but it does simplify shifting and reduces overall bike weight. Best component for uphill is fitness!!

Went from 9x3 to 11x1 last year. Great improvement. Have not missed the 3 front rings once.

Hi Colorado Biking. Very handy video since many people are now probably thinking about upgrading their bikes to the new shimano 12x groupset, specially the Shimano fans. I have actually just upgraded my Scott Spark from a 11 speeds group to the new 12x shimano XT. Funny that I had exactly the same issues that you had. First my bike came equipped originally with a direct mount derailleur hanger for which the new rear derailleur is not compatible as you figured out during the installation. I also never realized that incompatibility when I bought the group (quite strange that shimano is like walking backwards regarding the direct mount standard) anyway I had to order a new derailleur hanger for my bike - a non direct mount one - and was forced to put my upgrade on hold for couple days waiting for the new derailleur hanger to be delivered. The second issue you had I also had here: the chain length recommended by shimano didn’t work. As you said shimano recommends having for a full suspension bike 5 to 6 additional links + the quick link but same as you I found out that it was looking too long for my bike and I had to remove 2 links, leaving only 4 additional links + quick link which is what shimano recommends for hard tail bikes. Quite strange. And lastly the issue to shift the gear to the 51t cog. I also struggled a lot to get it properly setup, for a while I was thinking the problem was on the B-screw but in the end it was just about cable tension as you mentioned. Anyway despite the issues faced along the process I also agree that it was worth to upgrade the bike to 12 speeds. As you said it makes the shifting simple and takes away some weight from the bike as well as leaves the bike with a nice and clean looking. I liked it. Thanks for sharing your video and your findings during the conversion.

2:25I see you disconnect the shock, I haven't tried that. What I do is to bee sure I empty the shock & compress it. you have to make sure it's long enough to clear when the axle is at the its furthest, this varies, there are different types of suspension designs. There are several things that will change chain length, chainstay length, chainring size, cassette size, jockey wheel size, suspension design or no suspension. then you can get away with running medium cage on 11-50T but on full suspension you can't. length will play a role in how long the chain needs to be. in my case it's uncut KMC chain. I think its 114 links.with 11-46T & 34T or 32T oval that works nicely. gonna see how it works with 11-50T x 32T oval it might work, but I will see.

I am happy to see you have successfully upgraded your full suspension mountain bike. I am planning to upgrade from 26 to 29er mtb with SLX 1x12 speed groupset.

Best XT8100 install out there. thanks. I think I screwed up my chain length. I've now got 2 master links in my chain! if i take two links out, Im too short.

Another cool aspect is you can add an under bar dropper lever now that the front shifter is gone.

I think for me 11-50T x 32T will be a good combo, I have tested 34T oval which was too high, so I went down to 32T which was perfect, just enough to not run out of gears. most palces I can't reach much faster than 54km/h for those spots I could there is traffic. there might be one spot I could with no traffic, but never tried. I stop for photos for trailforks anyway. 😄

This bike is not old . I have an XCR enrage the yellow one plus ORBEA ridion Mountain bike , this bike in the video has the same frame patten as my ORBEA . when this yellow bike gets old ? I will be able to afford one .

Thanks!so ill be sticking with my 11speed xt m8000 for two more years then.

Thank you. I am fitting a 13-52 cassette to my recumbent trike. I currently have 22-324-44 chainrings. I am trying to decide whic single chainring to go with as I like them all. I do loaded touring in hilly country. Your video has been Very helpful.

I guess you shouldn't shorter the chain by the next 2 links. The length was OK. I did it on 1x11 and after removing 2 more links the system was less accurate and a bit noisy. But as I said... it was 1x11, I'm just preparing for m8100. And thanks for detailed video.

Kerry, nice work. Rode demo bike with new XTR 12 speed. It was awesome. Bet the XT is fantastic.

Chain length is: 2 max diameters + 2 comlete chain elements (see in the instruction of the M8100) :-)

interesting... that is a nice looking bike for being 7yrs old.. I've got a 2018 Trance Advance 2 w/ a SLX 1x11 speed drivetrain.. I've been debating a 12 speed upgrade. ..not sure it makes sense for the cost.. still tempting however. however I may get a 29er to go w/ my trance instead which would be nice.

Thanks for posting this. Thinking about going to a 12-speed on my 2016 Haibike. And I didn't know Biopace was still a thing. I have that on my 1988 Schwinn High Sierra mountain bike. Lol.

I am a little late to the party. Informative video, especially the problems encountered. I wonder why those 22 gave it a thumb down.

Great videos, really enjoyed them. My want to move out to the US grows stronger everyday, but I just can't find a way!

I don't care what the bike industry says, external routing is the way to go.

My frame is non-boost, so I'm locked up in the 1x11 forever for that bike 😔 1x11 is not bad either, I'm still running the same range as a SRAM NX Eagle but I'm concerned about replacement parts in the near future 🤔 let's not mention the shock size, Fox doesn't make them anymore, so I guess it will last until the shock dies or I resign to use some Chinese brand instead as a replacement.

9:15 smaller cog means higher gear higher gear for higher speed, lower gear for lower speed, bigger cog means lower gear.

my lock ring kept loosening too. I think the cassette is so wide that you cant get enough threads to bite. I bought an aftermarket TOKEN lockring with more threads

Personally I've put a SRAM NX 1x11 on my 2006 Specialized stumpjumper FSR comp, and after a year and a half, I never want to touch a left shifter again.

Thanks, good video(s). Questions: 1. did you have an oval chainring on the previous setup? Is not (1.b) did you notice any significant change on that? 2. what was the cost of the upgrade kit? I had a Peugeot road bike with oval chainring back in the 90s and I thought it was great, I had problems to find them for other bikes in later years.

Thanks for the great vid. But I'm a little curious why you would have any inkling that the 3x would be lighter. Think of all the material that is removed from the bike.

You should get used to the gears first on acar park or something similar then go on a harder stretch of singletrack

So you think XT is better then GX. Going to buy Trek remedy 8 and not sure which version to go for.

looking at converting to the 10 -45 on my bike in my case it will give me both a higher top gear and a lower low although I might not find myself using that low climbing all that much but I do run out of top end down hill. It will give some more top end it will be interesting to see how much if I do it.

Are you going to go to the I spec mounting brackets for the levers? You could also add the Shimano dropper lever that way.

i have the Same FEEDBACK Sports Truing Stand !!!

Did u had any problem with chainline?

Why does the front chain wheel is “egg” shaped ?

why not an 1x11 ? Dos one really need that ultra small gear?

Hey, what do you think, regarding the diagonal chainline, when climbing? I had tried 1x11 on my Fat Bike and felt so relieved when I could go 24/36 (2x10) again, as it is so quiet and smooth. With Race Face narrow wide in front, in sand and dirtI it became more a mill, than a transmission. Had some chain drops, too.

Really liked the video, loved that you went with an oval chainring, but did I miss the cost factor? How much did it set you back?

I am confused are you a professional Mountain Bike Rider ? Why the upgrade i switch to XT but i kept my same concept 3x7 on my K2 i dont jump rocks i jump buildings and pools sidewalks do i need this 1x12 ?

Helpful video, thanks! Is this derailleur definitely not compatible with a direct mount hanger?

0:44 have you been lucky with Shimano xt m785 brakes you got there? So far All Shimano brakes I had leaked at some point, 4 sets leaked under m615 2 year warranty, also threads for Torx bolt failed. but now M6000 leaked after few months, and swapped lasted few rides, swapped, lasted few rides, Unacceptable.

Did you use the 10-51T or 10-45T cassette?

After this up grade, do You have a problem with droping chain on cogs 51 45, 37 (three bigest cogs), when pedaling backwards? I did the same up grade in my Trek and now I have a problem with the falling chain ... The chain line comes out about 50 mm, and yet the chain drops.

Hi Kerry, that's a great video and I got confident to perform the same upgrade on my 2015 Canyon Nerve AL 9.0 after watching it. The only issue I'm running into know is about the chain line. I can't pedal back a full rotation without dropping the chain by 3 to 4 sprokets on the cassette. Have you had similar issues? Or not at all. I'D be highly interrested in sharing experiences. Many Thanks, René

I wonder if 116 links chains work on full suspension bikes. How many in total did you cut off the 126?

Hey, is that bike non boost? I want change from 3x10 (24-34-42) to 1x12 (36 with 10-51), but I have non boost frame - GT Sensor Carbon Expert 2014. Will be there some problem?

Love the vid but that's not an "old" bike per say

Is that the stock chainring?

Hi, i have the same problem with the derailleur mount. What is the spec you bought? Does it have a specific name?

Nice upgrate¡ what do you think about boost size in new frames¿

how did you manage to find a specific derailleur hanger for a 7 year old bike?

I am considering the same upgrade on the same exact bike (just a different color!) My question is does the micro free hub body come with the cassette or did you have to purchase that separately? Also, sounds like if I have the original derailleur hanger (I do, I have not made any upgrades since I got the bike) I should have no problem mounting the derailleur?

I would have put a triple chainset at the front as well. be an awesome bike then

For me XTR m9000 was too firm, but I think every thing mechanical will be too firm for me, I also got misalignment issues which can lead to pain if I shift when that happens, but also shifting a lot with hours of riding thumb will hurt at the tip, like a needle. Also the movement to shift 4 gears was too extreme anyway, I rarly did that, cus I would have to move my hand to do so, even 3 was too extreme, but gear shift had too much movement, this is bad, does not work great for adults and it's even worse for kids. Going from older shifters to M9000 the difference in resistance was huge, but also the spring in the rear derailleur will give firmer lever feel, but it's two different things, with M9000 it was a bump in the lever actuation, maybe it was done to prevent accidental shifts, but the rear derailleur spring will make the lever movement it self harder. but with Archer D1X the fit is much better, and it's painless.

Hi, is there a way to mount a 1x12 on an old 3x9 Speed? Or are those Bikes to old? Or is there just not enough space?

Roaming50 I have a 2015 Tallboy LT with stock shock and fork. I run a 1x10 on it. When you changed out the rear shock did it eliminate most of your pedal bob?

Is it recommend to build a new wheelset for the this 12 speed i am new to this i got my bike just recently however the bike is 2 years old running shimano 2 by 10 drivetrain

Hello! I'm upgrading my bike to shimano 12s as well, and I'm facing the same issue you seem to had : can't use the derailler to 12 clics as you at 01:09 on the video). You had resolved it by "adjusting high and low limit screws". What have you done exactly ? I know my H screw is fine as with no cable tension my derailler is perfeclty aligned. Don't know for the L screw because I cannot go that high on the cassette. Thanks !

wow, fun trail, where is it?

How much was the weight savings? Thanks Tony

Awesome video brother.

would you done the upgrade from a m9000 to an 8100 ?

Well, how fast you can go on flat roads? Which tempo you can keep with 32T chainring if you ride about than 10 miles on road? I ask this because I am about to switch to 1x12 slx but I ride mixed routes with mountain steep sections and flat road sections more than 10 miles. Thank you anyway

Hi , Where can I order this back derailleur adapter? R there more adapters r also needed?

What's going on with the sprocket. It looked out of round.

What size wheels is the bike running?

👍🏽

How do you love the eliptical front ring??

The main chainring isn't even circular in motion .. it's oblong .. There must be a scientific reason for that design change . Have you had to change the rear cassette / Main chain ring and the Chain since this video ??????????

works it the m8000 11s crankset?

please where i can find this adapter ? Thanks

Did you need to change the wheel hub for the new micro spline to accommodate the 12 speed cassette? thanks

Don't like that egg shaped front chain ring. Nope.

Hell no, unless you like servicing the POS Shimano 12 speed rear mech every 8-10 rides

Deutsche Technik? Sprichst Du Deutsch?

Use your old front shifter for the dropper post, easily modded with videos on here and works as good as, if not better, than any dropper lever. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CfmdLJ5dOO4.html