Pinewood Derby 4 Groove Speed Axle
One important thing you can do to improve the performance of your pinewood derby car is to reduce the contact surface area between the wheel and the axle. There is a lot of friction going on between your wheels and axles. Especially relevant is to note that a little effort will go a long way and a lot of effort brings home trophies! This set of 4 official BSA Pinewood Derby 4 Groove Speed Axle has been machined straight and grooved for friction reduction and the creation of a graphite storage slot. The heads of the axles have been slightly tapered for friction reduction as well.
- Cut in middle of wheel so less axle rubs on wheel
- Wheel does not contact axle so you have no friction (none, zero!!!) in this area
- Provides a cavity to hold graphite during the race
These are made by Derby Worx® and we resell them.
This axle starts life as an official B.S.A. Pinewood Derby axle. It is C.N.C. machined true and round, Derby Worx then adds 4 grooves (1 behind the axle head and 3 in the bore contact area) to reduce friction and hold graphite then head is back-cut for further friction reduction at the hub face on the wheel. They are semi-polished so the builder can finish it their spec. We recommend additional polishing for true dominating speed! Click here for our polishing kit:
Customize Pinewood Derby Grooved Speed Axle to your needs. Stay Legal, know your Rules!
The rules of local events sometimes differ from those of BSA box rules. Due to this, it is necessary to know your rules before choosing our unique modifications for your PWD car. Each pack’s rules will be different. We ask before you make a purchase, please check your local rules to see if you can use grooved axles. If you are unsure about the terminology, just email us, we will get you what you need.