Only once in a blue moon does one come across anything, be it person, place, or thing, that so clearly stands out amongst the competition so well as the White Industries freewheel.  Precision machined internals with 36 points of engagement coupled with a hardened and nickel coated sprocket result it even chain tension throughout and plenty of durability on the running gear.  The freewheel spins on sealed cartridge bearings ensuring long life and, in the case they ever wear out, hassle-free 'overhaul.'  If you want the inarguable best, there is no other way to do than the White Ind. freewheel.  

Can't decide how many teeth you need?  Look into the Dos Eno freewheel which offers two cogs next to eachother on the same freewheel 2 teeth apart (the Surly dingle cog freewheel equivalent)!

If you want the best of the best, go for the trials version with twice the number of engagement points (72) and more durability (18T only)!

16-22 teeth, trials 18 only, Dos Eno in 16/18 and 17/19

All freewheels are 3/32"