SpecE46 Tire Sizing
#39292 from Rob Piekarczyk · Rule change · TB 26-01 (2026-01 Fastrack)
In T3 Spec Lines, BMW SpecE46, change Notes as follows:
"Must conform to all SpecE46 rules Version 3.0. SpecE46 spec tire permitted or any DOT permitted up to 225 245 permitted. No
other touring allowances permitted. Engines may not be modified unless specified in the Spec E46 rules and must conform to
touring tech procedures. Driver must possess a current copy of the rules. Dyno results do not ensure engine compliance. SE46
HP limit does not apply."