08/27/2026
October 3rd, 2026 Event!
Alpena Cycle Club Lawn Mower Derby Rules
$50 Entry Fee
Driver must be at least 16 years age and possess a drivers license(Parental consent is required under 18 years old)
ENGINE-
*Vertical shaft engines only
*Stock lawn mowers engines only(Briggs, Tecumseh, Kohler, Kawasaki. No aftermarket engines will be allowed)
*Pulley swapping is permitted. 15mph max. If you're suspected of breaking the limit, you risk being DQ'd)
*Gas only, No diesel. (Pump gas, 93 octane max)
*Exhaust may be modified but must exit up or down only.
*Carburetor and Spark Plug protection is allowed.
*Engines must have shrouds on them.
*Aftermarket throttles are allowed.
DRIVETRAIN-
*Factory rear end/transaxles only.
*Forward and Reverse must work.
*Brakes must work.
*No dually setups.
*AG/ATV tires are allowed, maximum height of 20" tall.
*Air filled tires ONLY. No foam filling, no tire flaps. Tubes are allowed.
*Stock steering/suspension configuration only. No aftermarket steering racks.
*Aftermarket steering wheels are allowed.
*No cutting/shortening axles.
*No tires chains of any kind.
*No wheel weights of any kind.
BODY-
*Leg protection is a MUST, 1/4" Plate max. Plate must not exceed the length of your footwell and must not exceed the height of your rear fenders.
*Stock hoods are okay. You may make a hood but it must not exceed the size of the stock hood and must not be thicker than 1/16"/15g sheet.
*Hood must cover top of engine. Sides of stock hood may be cut.
*Stock bumpers are allowed.
*Side rails are permitted and encouraged. Same rules as bumpers, they must not exceed the width of your tires. If you wish to put narrower tires on, that is the new width or your mower. Side rails must not be bigger than 2"x1/4" angle(with flat side facing out), 2"x2"x1/4" square/round tubing, 2" I beam or C channel(with flat side facing out).
*Custom front and rear bumpers are allowed. Maximum size is 3"x3"x1/4" square or round tubing, 3"x3"x1/4" Angle with flat side facing out, or 3"x1/4" I/H Beam or C Channel with flat side facing out.
*No sharp edges on bumpers at all.
*Stock frames only. No welding plate on the frames.
*Gas tank must be securely mounted and must not be more than half full.
*Rear mounted gas tanks are allowed as long as they're under the body and well protected.
*Any/All glass must be removed.
*Roll bar is allowed but not required.
*Rear fenders can be creased and seam welded.
*Cutting decks must be removed.
Attention drivers!
Mowers will be heavily inspected to ensure safety and fair playing field. If you are told to change something before passing tech, change it or don't run. Club officials make the final call.
You are allowed 2 roll overs. This means if you are rolled once, you can flip your mower back over and if its still good to go, you're welcome to continue participating. If you are rolled again, you will be out.
If any part of your body touches the ground, you will be immediately DQ'd.
If you are pushed over a log, forcing you out of the playground, you are welcome to try driving back over the log and remain in the game but you must remain on your mower whilst doing so.
NO INTENTIONAL ROLL OVERS. We do not have you out there to put each other in danger. You should be focusing on disabling an opponent's steering, axles, tires, etc. Nobody wants to see a perfectly fine derby vehicle sitting there empty because he got pushed over. If you intentionally roll someone, you will be DQ'd.
If your leg protection comes loose from the frame/body, you will be DQ'd for your safety.
If you're unsure of the speed of your mower, download GPS Speedometer: Speed Tracker and check it. If you are suspected of breaking this rules, you will be black flagged for the safety of all participants.
Any fuel leaking will result in DQ
If a mower rolls over, STOP MOVING until we can get the mower upright and ensure the driver is okay and get them off the playground.
You MUST MAKE CONTACT. You have 60 seconds to make contact with someone. No contact is 60 seconds, will result in a DQ.
IF YOU HAVE QUESTIONS, REACH OUT AND ASK. DON'T BUILD IN THE GRAY AREAS. OFFICALS MAKE THE FINAL CALL ON INSPECTIONS.
Call or Text Dakota(989-657-1063) or Dave(989-464-8155) if you have any questions on rules.
