Hi can anyone help with some advice. I have built up a 2007 specialized big hit 2 and fitted it with a 32t narrow wide chain ring as that is what I've been used to riding. It rides great it handles great...but today I have noticed that the lower edge of the chain grinds into the rear triangle with very little clearance. Bearing in mind I am running it with an E13 SRS 32 chain device and shimano zee short cage derailleur. Is there a simple way round this or do I need to run a larger chain ring for more frame clearance. Any pointers would be great thanks.
32 teeth should be enough to clear the frame. Even using a 30 Tooth (pictured below) there is still plenty of frame clearance. That's a different frame, but still, it looks like there would be plenty of room on any frame.
The following picture shows a 2010 Big Hit with a 32 tooth chainring, and you can see there is ample frame clearance. The chain device actually has to bring the chain closer to the frame. Perhaps your chain device what's causing the problem and it is bringing the chain too close to the frame. You should be able to use the bike without the chain guide as the narrow wide chainring should be enough to keep the chain on there by itself. or perhaps use a different chain guide that mounts on the top.