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At least from the Absolute Black website it appears that the DM chainring has a normal tooth profile whereas their 104BCD rings have the narrow/ wide (XX1 style) tooth profile. I hadn't noticed this until the other comment here on this thread...
Normal mech, normal chainring and 40g guide will work out pretty much the same weight as clutch mech, N/W chainring and no guide I think. The appeal for me was a "clean" drivetrain but the difference in performance between the two set ups makes me think about a chain guide again
Replaced with original pulleywheels with some MSC alu wheels and 1 bolt with a alu 1. Originale weight was 227 grams.
From the testride today:
Mads Kock wrote:
Trying Sram XX1 crankarms and Absolute Black DM chainring. First testride resulted with dropping the chain about 6 times on a 27 km bumpy singletrack so that wasn't perfect. I will try with a type 2 rear derailleur now
Edit: I have shortened the chain by 2 links after the first ride. Maybe this will help a little bit.
I have a very similar set up; 2011 Scott park 10 with lefty fork, running 26" but thinking on converting to 650b for a while now.
Drive train I'm running a spiderless 36T MRP chainring (standard teeth) with XO crank a XTR shadow plus long cage, Absolutely NO Chain Drop so far. One time It happened because I forgot to engage the locking switch. I know there is a big push on the market for XX1 type chainrings...but as you did switching to XO type two or XTR shadow plus, it should work with no problems.
It's Marcin from AbsoluteBlack.
Spiderless version indeed does not have narrow/wide tooth, so it requires short/medium clutch cage in order to work properly in light riding. But even then for some it may not be enough in very demanding terrain.
My 104bcd chainrings do have narrow/wide profiles and it is impossible to drop a chain almost. What DanW wrote here is the issue with KMC chain. My chainrings does not work with KMC chains and thus problems with mud. Every other chain works, just not KMC as they are out of spec and have to tight links (wrong dimension). KMC got back to me as they found out on my website i don't recommend them so i guess they will soon make a running chain to fix the issue.
I will have in 5-6 weeks also Spiderless version with narrow/wide profile. So if someone is really unhappy with the current performance of regular spiderless chainring please get back to me via email (firstname.lastname@example.org). But please notice that i wrote very precisely on my website that when riding in demanding conditions you WILL need to use chain catcher of some sort on the top.
Most customers of the spiderless solution are singlespeeders and Enduro/DH guys. first ones does use anything and second ones always use a full chain catcher anyway "just in case" as for them is scary to ride without anything. So for these people i have build non narrow/wide chainrings as they don't need it.
New chainrings are coming soon so stay tuned.
Thanks for the post - I must admit that I didn't see that you made different chainrings for spiderless and 104mm but after getting the type 2 derailleur it has been working great for me. No dropped chain yet - I don't ride 2-3 meter drops or downhill but xc in pretty bumpy terrain so I'm satisfied.
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