When I changed the chain ring to a 42, I went with a Deckas. They are on Amazon for $25. It comes with new bolts. They have a lot of good reviews.
It was a very simple swap... maybe 15 minutes. I did not need to lengthen my chain. I did need to remove the chain guide, but never had an issue of the chain coming off thanks to the narrow-wide teeth on the new chain ring (make sure to slot your chain links on the correct narrow or wide teeth).
It was a very simple swap... maybe 15 minutes. I did not need to lengthen my chain. I did need to remove the chain guide, but never had an issue of the chain coming off thanks to the narrow-wide teeth on the new chain ring (make sure to slot your chain links on the correct narrow or wide teeth).