That's a really solid base ! The parts are really varied and it looks like there are plenty of ways to go about improving your build.
However I think the complete lack of any information about your current build or what's going on in the race makes it a bit hard to really engage with. Sure I've got a part that increases stamina recovery rates and such but I don't really get to know how that affects how the race goes, and what happens during the race is a bit hard to decipher if a slow down happened because of the opponent's gear or if it did for another reason.
I would love to see a post jam build with extra UI :
Stats in the shop + some quick explanation of what each actually does,
And some feedback during the race on the status of each opponent with the stamina/speed, buffs and such, at least a slider to indicate the position on track to see how much you're crushing or getting crushed by.
Still got a grasp of it and absolutely smoked Chris on all stages though haha !
Overall really well polished, impressive !