^ you can use a inverse shim. Make one or buy one - the search will help.
Also airwings tend to be the most popular bullhorns/aero bars for general use. So that must say something. If you're using the alu langster are you 100% that the clamp is 25.4? If not, you can get an oversized stem, which'll give you more bar options in the future.
One thing to remember is when you're stretched out on bullhorns you'll prob be futher away than you were in the drops, so you may need a shorter stem. My 2p is by a cheap or cheap 2nd hand stem to check your reach, so you're not going back and forth.
^ you can use a inverse shim. Make one or buy one - the search will help.
Also airwings tend to be the most popular bullhorns/aero bars for general use. So that must say something. If you're using the alu langster are you 100% that the clamp is 25.4? If not, you can get an oversized stem, which'll give you more bar options in the future.
One thing to remember is when you're stretched out on bullhorns you'll prob be futher away than you were in the drops, so you may need a shorter stem. My 2p is by a cheap or cheap 2nd hand stem to check your reach, so you're not going back and forth.