I've recently switched my bike to a single chainring. All in all I really like it, but my chain rubs in the two smallest cogs of my cassette. I need those two cogs when on the road since I'm running such a small chainring.
TruVativ Elita Cross GXP External Bottom Bracket
39T mounted on the inside
BBG Bashguard mounted outside - 42T max
Redline Chain Keeper
SRAM PG950 9 spd cassette, 12-26
What are some suggestions to try? Guard and chainring closer to the same size? Longer spindle? Washers to push the guard out a bit?
I run a "similar" single chainring 36t w/ 42t franken-grind guard. But I haven't noticed any rub on the guard. I think the washers/spacers inside the guard would be the easiest/cheapest way to go. You may want to get sets of various gauges to eliminate the dreaded "gotta go back to the shop again". Hope you solve the problem.