Product Overview
HLD-62244075
This part has been in the testing stage for quite some time. For us, making performance parts isn’t just about outright speed—it’s also about ease of use and understanding. We want to give our customers parts that not only improve their car, but also help them understand why those changes work and how they differ from what’s already on the market.
That’s one of the reasons we go into such depth explaining every part on our website. Knowledge is power, and that’s something that has too often been pushed to the side in RC racing.
Introducing our +2 Toe / +1 High Roll Center C Block
For XB2 and XT2 Series Cars
Over the last year, we’ve tested nearly every C and D block configuration available for these cars, searching for what works best—not just for top-level competitors, but for the average racer as well. What we found was a clear trend across most setups:
- Maximum rear width
- The highest possible roll center (C or D)
- 0–1° of rear toe
At Hot Lap Design, our goal isn’t just to make cars faster—we want to make them more versatile.
After extensive time with the ’24 platform and now deep development on the ’25 and ’26 cars, especially for U.S. carpet tracks, a few issues became very clear:
- The chassis brace is a band-aid
- Rear roll center is too low
- The car has excessive off-power steering
We’ve already addressed some of these issues with parts like our Smooth Steering Plates, but the chassis brace itself creates bigger problems. First and foremost, it negatively affects weight distribution. For a car to be aggressive and consistent, it needs to flex and rotate correctly through the corner.
Proper flex promotes rear grip and prevents the inside rear tire from lifting, allowing the car to rotate naturally instead of micro-sliding through corners. The result is a more planted car that resists over-rotation—especially in tight, low-speed sections.
With these changes in place, the 5-gear transmission went from feeling loose in the rear to becoming an absolute weapon. The car now drives harder into the corner, carries more speed through it, and exits with what feels like unlimited rear grip.
Where Our C Block Comes In
Our newly designed C (and D) block eliminates the chassis brace slot entirely, creating a stronger and more rigid block from the start. Removing the brace allows you to reduce rear weight, and when combined with the 5-gear transmission, it shifts a significant amount of mass forward.
This change allows the battery to move back toward the center of the chassis instead of being forced all the way forward. The result is a better-balanced car with increased consistency, more overall grip, and steering that’s not only aggressive—but far more usable.
