We’ve added the Maxxis Grifter (in 20×1.85 and 20×2.10) and Odyssey Super Circuit tire (in 20×2.10) to the online bmxultra.com Gear Calculator. A big shout out and thanks to Dan Steel from Deadfast Racing for taking the time to contribute with the additional tire measurements, helping us expand our tire library even further.

Maxxis Grifter Tire

The Maxxis Grifter is a lightweight, high-volume casing BMX tyre designed for freestyle riding.

• Dual Compound Technology
• Foldable bead
• Silkworm bead-to-bead protection
• Tread pattern makes landings stick at any angle
• Designed to allow tricks to flow easily

For two decades we have been committed to providing the best and most comprehensive FREE online BMX Gear Calculator available, keeping it up to date with the latest in BMX racing tires. If you notice any tire options missing be sure to contact us and we will add them as soon as we can.

While all other gear calculators provide you with the Gear Inches or Roll Out for your specific gear, ours provides both in an accurate chart based on your tire of choice, so you can compare multiple gear options with just a single gear selection. You can also save up to 5 tire/gearing combinations for quick reference.

As always we do plan to update the iPhone/iPad app soon to bring it in alignment with the online calculator.

The free web based online calculator works well on any browser and device (Android devices, iPhones, iPads, PCs, laptops, etc) and we encourage everyone to take full advantage of the free calculator.

Check out the updated online version here: bmxultra.com/gear-calculator