Hi guys,

I installed a new 10 speed setup on my on-one 456, but when im on the biggest cog on the cassette, the chain literally just drops off the top of the chainring at the front.
I have attached an image below to show how the chain bends, im no mechanic, so I was hoping somebody on here might be able to give me some advice on how to sort the issue out?

I tried to fix this, by removing the bottom bracket spacers (which are going to have to go back on) and this didn't help at all.
Its literally driving me nuts, I was hoping to keep things as light as possible and didn't particularly want to use a chain guide, but would this solve the issue? If so, which guide would do the job cheaply?
[img] [/img]

Any help is hugely appreciated!