For trails, going bigger in the back is a NO NO..
For one, you lose ground clearance, and for 2, rear sprockets cost more money to buy.
I guess it depends on what trails you ride..Smooth logging trails, I consider roads..But rocky, rutted tight stuff, I consider trails and IMO you want as much ground clearance and bottom mid torque you can get.
In which case, dropping down your front sprocket a tooth, will make a big differance on bottom end torque.
For me, I run some of the knarliest, tightest, rockiest trails around, on stock gearing on 250R's..I even drag race with the stock sprockets and MX race too.
They work great all around for me.
Here is where my long useless list of stuff nobody cares about should go...
Proudly NOT a member of
"Team on the Teat"