The guys over at CTD pointed out a little error with the IRC tires on the free online bmxultra.com gear calculator. So I’ve dived in and fixed it up. Sorry about that, we hope it didn’t cause any inconvenience, but it should be all correct now.

You should see the full range of IRC BMX race tires. Including;

• Siren Pro Rise
• Siren Comp Rise
• Siren Pro
• Siren Comp
• Siren

Make sure you reach out and let me know if you find anything that doesn’t look right and I’ll get on to it right away.

ABOUT THE BMXULTRA.COM GEAR CALCULATOR

For over 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 store 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