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Is anyone else as uncouth as me & running double chainset on the latest Cotic Solaris Max? Please pick your jaws up from the floor, thanks. I run a 10-speed drivetrain but with 11-speed Shimano M5100-B2* 36T/26T chainset which should be OK (*I couldn't find a M4100-B2). The Cotic website say 36T with 55mm chainline works, and I've measured my big ring chainline & it is 55mm, so it should be OK.
However, I'm getting more chainsuck than I'd like & the space between the 36T chaniring & the chainstay is quite tight (~5mm), which is about half the space there is on my Giant Trance that runs a similar 10/11-speed mix & it virtually never chainsucks. The Solaris has done this from being a new & clean drivetrain around 3mths ago.
I suspect the tight spacing is partly to blame; it'd be better with more space. 34T chainrings don't appear to exist in the needlessly incompatible non-square bolt pattern on the Shimano chainset, so, is it OK to push the drive side BB cup out a bit further than the current 2.5mm spacer by adding another 1 or 1.5mm spacer?
Thanks.
chainsuck is caused by worn/ dirty drivetrain not clearance or frame shape. Yes if clearance is low its more likely to damage the frame but that is not the cause
+1 to that, it’s the chain/ring interface that’s the problem, not the clearance to the frame.
Ahh… I remember winters before we all moved to single chainrings on proper mountain bikes… I’m never going back.
Have you considered hounding Cy for a decade until out of frustration he gives you your money back?
joshvegas, if it works... 😛
Cheers all, I'll go & clean my chain. 🙂
Might be worth asking if it was designed for dual chainrings in mind - maybe it wasn’t really anticipated (even though I guess it has the cable guides) or what you are running is a bit out of spec from what it was designed for?
A bike should be designed with enough clearance so when chainsuck happens, which it will do, then the chain is pulled up and simply drops back down with no issues. If it’s designed poorly then the designer won’t have narrowed the chain stays enough and the chain will becomes jammed and cause damage. You can’t really stop chainsuck 100% so that inevitability needs to be designed into the frame.
Or just make it 1x which I appriciate has solved a lot of issues and even I have gone to it now after a long time rejecting it (mainly cos I was too unfit!).
Hi, the frame does accept 2x drivetrains, I asked Cotic via email before doing it. And the website does say it can take it too, which I didn't notice to begin with; it just needs a Shimano side-swing front mech. I think the clearance could be better basically as that would give a better opportunity for the chain to release on at least some occasions - as is likely the case on other bikes I've run which have more clearance.
I tried 1x12 first but I couldn't achieve enough tension in the system (yes, chain was short enough, shorter than the Shimano instructions etc...), or something or other so I was getting chain slap on the top of the chainstay when I stopped pedalling. Hence, I gave up on it after a few months and went 2x10, since it had worked well for me on my Trance.
2x is no issue on a Soda/Solarismax.
You are using a boost chain set?
Yes, I didn't mention it in my first post but the B2 version of the Shimano chainset is the boost one.