Chain tension in your pic looks OK, so unless you have tightened it since the photo was taken, it probably won't be the chain being too tight...Check that the tension of the chain doesn't vary too much when you spin the cranks, it should stay at roughly the same amount of tension, unless you have a poorly made chainring/sprocket.
It was grinding like that, I then took the wheel out and then put it back in again, probably a little tighter and it still made noises. I had to peel the chain off the chainring tho, and having now checked on the px site it's defo 1/8 so I'll order a 1/8 chain and run it with my 1/8 17t instead of 3/32 16t which will go begging with the chain, both having done less than 4 miles.
Fail on my part for not paying attention & reading properly first time round.
It was grinding like that, I then took the wheel out and then put it back in again, probably a little tighter and it still made noises. I had to peel the chain off the chainring tho, and having now checked on the px site it's defo 1/8 so I'll order a 1/8 chain and run it with my 1/8 17t instead of 3/32 16t which will go begging with the chain, both having done less than 4 miles.
Fail on my part for not paying attention & reading properly first time round.