I 'm looking 18 tooth rear gears for a lifelike. I see BSRT 18 tooth gears listed on ebay at times but they go for a ransome. Does somebody still sell them, I know BSRT doesn't have them listed on their website.
You could try www.jandsho.com, John said awhile back that he was going to be making 18 tooth gears. Quicker had 18 & 19's, but I think he is out. I picked up what ever he had left last year @ a Illinois HOPRA race.
When racing on the 50' quad oval at A&M Raceway,
8/18 gears are my choice to get 1.7 lap times with a stock 6 ohm armature BSRT G3.
On anything except a Life Like T you can use a Wizzard RA09B 9 tooth brass pinion,
with a BSRT 420 20 tooth Delrin crown.
Or use a 7 tooth Tyco pinion with a 15 tooth T-Jet crown,
with Wizzard AA7 .020 nylon spacers to get the same high end gear.