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I'm after some long bolts and spacers so I can move my front ring inwards to get a better chainline for 1x9,could anyone point me in the right direction? Thanks.
how much are you moving it by?
Fiddling with spacers on an HT2 BB can get you 5mm?
Prob about 5mm ish,it's a internal rf bb so prob can't do anything with that.
what length axle - if it's 113 and you have enough chainstay clearance you could switch to 108 which'll get you 2.5mm.
I'd be wary of spacing chainrings - there's a lot of grunt going through them and you want maximum ring/crank interface - some long crank bolts won't probably wouldn;t cope.
I run spacers on my BMX and it'll take everything I can give it under full power.
Yeah it's 113,will have a look into it,starting to think I should've left it s/s.
This is something I have been thinking on. On my 1x9 its set up with the chain line pretty much bam on the 5th sprocket ie dead centre.
When clean, the drivetrain doesn't make much noise, whatever gear it is in. However, when dirty, going to the largest sprocket it makes horrid noises like its really bad chain alignment. same dirty chain on smaller sprockets - no problem.
Is it because the chain is wrapped around a larger sprocket, the chain has to flex more, hence it protests more? It doesn't happen for the same offset onto the smallest sprocket. Does that make sense?
Therefore would it be less likely to make horrid noises if I moved the Chainring in a bit?
Or is my mind solving problems that are only in my head and its just a noisy drive chain
If the chainline is bang on the 5th sprocket, as you suggest, then the chain angle will be the same on the biggest sprocket as it is on the smallest sprocket, so that's not it.
I suggest the increased noise is due to the sprocket shape. On the big sprocket the chain is rubbing on the inside of the sprocket teeth (the surface closest to the wheel) whereas on the smallest sprocket it will rub on the outside of the teeth. Given the teeth are chamfered on their outside to aid shifting on to a bigger sprocket, there is less friction and hence less noise when the chain is on the smallest sprocket.