*Product logistics is currently handled via printing serivce, delivery times are roughly a week.  Finish product photos will be uploaded as they're available.
The first drop in the Bad Investment Builds Cheat Sheet Series — now in towel form, because grease doesn't wipe itself off.
The same neon-on-black cheat sheet that lives on the hoodie is now on something you'll actually use in the garage. Motion ratios, spring forces, ride frequency curves, axle heave and pitch behavior over a bump — all the equations that explain why your car feels the way it does, printed in vivid cyan, magenta, orange, and lime against deep black. It looks like something pulled off a race engineer's wall and repurposed for the workshop sink.
This is real vehicle dynamics knowledge you can dry your hands with. Too soft in the rear and it feels unsupported — great for washboard fire roads, not so great for the chicanes. Too stiff and it bucks and pitches like it can't settle. This towel explains the difference, and the math behind fixing it.
Plush and light enough to live in a gym bag, on a workshop shelf, or draped over the rollcage of your project car. Holds up wash after wash without losing the crisp, high-contrast print — because it'll need washing. You know what you're doing in that garage.
Use it after a track session, to wipe down a beloved project car, or just to confuse everyone at the gym who doesn't know what a motion ratio is.
Learning the how gives you more time to think about the why — and that's the whole point of Bad Investment Builds.
Follow @badinvestmentbuilds on Instagram and YouTube. Use the free Ride Frequency Calculator at badinvestmentbuilds.com to dial in your own setup.
This is for the highly engineered DIYer. Not the one with the most money — the one who did the math







*Currently Print to Order, so the order is drop shipped from a custom clothing supplier once it's printed typically 3 days after order is placed.
Product features

- 52% polyester / 48% cotton blend for durability and quick drying
- Super soft, lightweight feel that's gentle on skin
- Vibrant, high-resolution print with bright, crisp colors
- Absorbent fabric that soaks up moisture efficiently
- One-size: 28" × 16" (71.1cm × 40.6cm); printed on one side

Care instructions
- Machine wash separately: cold (max 30C or 90F), gentle cycle
- Do not bleach
- Tumble dry: low heat
- Do not iron
- Do not dryclean