on the mechanical side, as i remembered if a chain touches more a surface of the driving or the driven chain ring, than the torque transferred will be theoretically more efficient. a chain guide with a lower guide would do just that.
you mean less surface touched = better torque efficiency? I will certainly agree to that.
What handlebar widths are most people riding on or prefer for 4X bikes? 740? 760? 780?
Isn't it depend on rider's preferences? Personally, I use 740mm, from Funn Fatboy 810 because I searched for a small backsweep (9 degree felt a bit too much for me, the Fatboy has 5 degree). It does make hard to pull up the handlebars, I think. But the leverage is better than my 700mm holzfeller WC bar.
actually, it was in his, not mine anyway, I think what SBK-ID meant to say is if the chain touches the chainring more (just like on a 4X/DH bike with a lower chainguide, compared to XC bike) it gives better torque efficiency. Not sure about this, but isn't a lower guide roller has its resistance to roll? Which means it needs more power to pedal. CMIIW
Updates: Continental X King tyres, Superstar Helix Rotor, Ethirteen G-ring 34t chainring
Just a thought; if you're running a chainguide why not use the bottom roller/guide to tension the chain? That way you won't have to use a tensioner on the back, makes you bike look way cleaner (and lighter if you're picky bout that!)
I think the chain slack will be handled better by tensioner rather than lower guide. (just guessing )
Yes the lower guide does not give enough tension on its own. Also when i put the lower roller, the drivechain has alot more resistance.
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